Crankcase Venting In 2024? 😞 Top 4 Crankcase Pressure Questions Answered • Harley-Davidson M8
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- Опубліковано 9 вер 2024
- Yep, crankcase venting and crankcase pressure are still real issues to deal with on our Milwaukee Eight Harleys. Some think that the updated oil pump eliminates that issue, but that’s not the case. I’ll explain this plus the other top three questions I get about crankcase venting, crankcase pressure, and crankcase vacuum.
⏱️ LINKS TO THE 4 QUESTIONS ⏱️
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00:55 Crankcase pressure is still an issue?
03:11 Transmission top cover vent any good?
03:44 Do the external breather mod too?
04:45 What am I using right now?
⏱️ OTHER KEY POINTS IN THIS VIDEO ⏱️
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01:39 Easy check for crankcase pressure
02:17 Dangers of crankcase pressure
02:25 Benefits of crankcase vacuum
04:32 My priorities for pressure & vacuum
05:36 Street Bob Hardtail Mod!
I'm currently riding a Harley-Davidson Softail Street Bob FXBB with 114 Stage III.
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VIDEOS MENTIONED
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PLAYLIST: M8 Crankcase Pressure • Venting • Sumping
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Updated M8 Oil Pump Improvements
• M8 • Wondering If You ...
Transmission Top Cover Vent
• M8 Crankcase Venting •...
External Breather Mod
• Monster Sucker Mod • A...
Vacuum-Ported Catch Can
• ❓Vacuum-Ported Catch C...
Vacuum-Ported Catch Can Follow-Up
• Vacuum-Ported Catch Ca...
Kodlin Lowering Kit
• Kodlin K66025 Lowering...
Check Your Harley For Sumping (Pull Crank Sensor)
• M8 • Wondering If You ...
Convert FXBB Street Bob To Hardtail
• Making The Softail FXB...
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#crankcasepressure #crankcaseventing #m8 #streetbob #ronsworkshop
Have you dealt with crankcase pressure on your bike? Which solution(s) are you using? And do you have any other questions or ideas? Let me know!
Hi Ron. Excellent video as always.
Tried finding the Cole Palmer piece you have listed, but Amazon has none available, and can't find it on the Manufacturers website. Any suggestions on another? Thanks.
@@mariolepore8909 thanks for the kind words! I did some digging and found out that the previous supplier I used no longer carries the check valves, but there is a new supplier. The drawback is they only seem to sell them in packs of 6. Here’s a link to what I found: bit.ly/3GxGyGQ
And here's another one that I have not tried but could be promising: bit.ly/3MgLY9A
Other check valves may work fine, but the lowest possible opening pressure is definitely beneficial (the one I have opens at just 0.1 PSI).
Let me know what you end up with!
Own only two stroke machines
I did crankcase vent mod on my RKS as soon as I brought it home from the dealer (first mod ha!). I rode over 12k miles last year and its great! The check valve still works hose is not deteriorated and no leaks from barb fitting. Used all parts you had listed in the video - thank you Ron!
@@boostedbeercans that's great to hear! I'm so glad it's working well for you. I appreciate you giving an update.
I run the Trask and DK Customs ext breather... No snot into combustion and great venting. My bike runs great with these setups. M8s suffer from blowby and excessive oil consumption. Letting snot into the combustion chamber creates carbon deposits on piston, which over time will cause detonation. Trask highly recommends their vent setup and ALSO venting externally the head breathers. They have a wealth of information and know a lot more than I do. Great video :-)
Hey Richard - thanks for sharing that info, and thanks for the kind words!
I’ve done the breather mod above the air intake underneath the tank. In addition i did your transmission venting mod WITH a check valve to keep vacuum. So best of all worlds, no oil in intake, therfore no carbon buildup on piston heads, underneath the tank so no lines in sight, transmission is breathing with vacuum. So that is what you should do if you listen good to all info, including Kevin Baxter. If you do these mods, do both, not one or the other. Keep the rubber down guys! Have a good one and great footage!! Greetz a fan from The Netherlands, yes land of wooden shoes, windmills and gouda cheese 🇳🇱🧀🤘
Thanks for the kind words and thanks for sharing your setup!
I visited Amsterdam for the first time last October :)
@@RonsWorkshopNice! I was in the USA last year on route 66 with my brother… loved it! When i can i will be back. Hope you liked Amsterdam.. in live near that city.. in a village near a lake. Keep up the good work! It sure helps a lot of us bikers. 👍
Hey Ron. On my 2019 FLHX, I went with a 3/8” hose on the transmission top cover vent to atmosphere through the check valve to a small filter. Installed the vent with an S&S cam chest kit upgrade. Definitely had oil in the intake before the upgrades. I even saw burnt oil buildup on top of my pistons. After the upgrades I’ve seen absolutely NO oil in the intake. Great solution. Bike runs great and verified no sumping during a recent oil change. Great content. Appreciate you sharing your work.
Hey Kenneth - good call on the larger vent hose! If I had it to do over I'd go with 1/4" or larger. Thanks for sharing your project, and thanks for the kind words! I'm glad it's working well for you.
Thanks again Ron! Got my EBS installed with a catch can and I just ordered the A1 Cycles vented dip stick. I was gonna do the vented trans cover, but want to see how the dipstick performs first. If it does good, I'll probably do the trans vent then get me a dipstick with the oil temp gauge on it. Appreciate you Brother!
Let me know how it goes!
I just ordered all the parts to make the top cover mod and I found a new cover on e bay and I will switch them when I have to go to the dealer for service. Problem solved! Thanks Ron.
Nice! Let me know how it goes.
I'm glad you're back!
Hey Tom - thanks for the encouragement! Lots of fun projects underway and in the works :)
Thanks again for the first round of videos. I vented my trans cover last year and it works great. I upgraded my intake beginning of winter and vented the head breathers. On the shakedown ride, my breather assembly blew right off on the highway! (I didn’t have the tubing tight enough). That told me there was pressure on the tubing unless the vibration was enough to rattle it off, but there was oil dribble on the breather bolts after just 2 or three miles. Did a better job installing another one and not looking back…. I have an brand new A1 vented dipstick I didn’t use if anyone wants it cheap but I used the pod filter and hose to vent my trans.
Hey Ralph - thanks for sharing that info! I’m glad it’s working well for you.
I have a HD SE heavy breather intake, very similar to the Arlen Ness. However, each breather bolt exits into a cavity, and the cavity is plugged with a double oring part. The plug is a separate HD part that comes with the heavy breather kit. , Each cavity has the same little hole that goes into the intake of the throttle body. Within each cavity, I have placed a piece of HD detailing cloth (the white ones you can buy at the dealer), cut to fit snugly within the cavity. This absorbs most of the oil mist and I replace each cloth piece every thousand miles or so. I plan on using the Fueling dipstick vent to improve on this, just bought it. You have some great videos on this topic!!!!
Hey Martin - thanks for sharing your setup and thanks for the kind words!
Hi Ron, thanks for all the videos, I watched them all. I had a Sport Glide with a stage 2 and started by fitting a vented dipstick then did the top cover mod, it all worked great and I didn't get any oil in the filter on that bike ! But now I have traded it for a RKS, only stage 1 at present (that may change !) First thing I did was the transmission top cover mod, I just swapped out the Screaming Eagle Elite as it got in the way of my knee and I didn't want to have to carry a rain sock ( I live in the UK so get caught in the rain a fair bit ! ) I have fitted an S&S stelth now and found lots of gunk in the front breather bolt but not the back ! Anyhow I have used the original bolts that vent straight through and then run a piece of hose from each to a T piece and then a catch can just above the starter. I was wondering about just venting the front breather bolt as it had all the gunk in it and letting the rear one vent into the air intake just to give a little vacuum ! What do you think ? Is it always the front breather that get all the oily gunk and if so why ? Thanks again for sharing all your research.
Hey David - Thank you for the kind words! I suspect it’s just chance that just the one breather bolt had the gunk. But it would be easy enough to run your experiment. Give it a shot and see what you get. Based on what I’ve seen, I don’t think you’ll get any vacuum but it won’t hurt anything. Let me know how it goes!
I started out with the vented dipstick that in no time would stop up with oil so I now use the DK Customs “transformer” which mounts on the throttle body and vents to a catch can. I’ve had it on the bike for approximately 4K mile now and definitely has solved my oil carry over issues.
Hey Griff - thanks for sharing that. I haven't yet checked out the Transformer, but I'm definitely a DK Custom fan. I have a couple of their items, no disappointments!
Hi Ron love you work 👍iv done the transmission top cover and been going strong for about a year now so thanks for that. On the thought of other topics for you to cover I think shortening the rear fender ie take away material from the rear and spinning the fender forward + maybe shortening the side struts and rounding the ends ! Again cheers from the uk.
Dean
Hey Dean Moss - thanks for the kind words! And interestingly enough I’m planning on that very project you mentioned. When I converted to the chain (that’s the next video in the lineup) I had the rear fender off and I got a vision for how cool that looks. Hoping to tackle that soon!
And if you want a sticker send me a DM on Telegram, Instagram or Signal with the mailing info @RonsWorkshop
That's great Ron 👍 my thoughts was using the original fender as iv a side number plate holder and small side lights, if cut at engine end there would be no need to have it sprayed ! Would love to see ur input on this. Ps mine is 2019 breakout but similar design to urs.
Dean
Yeah I think that’s viable. Not sure how the existing holes would factor in, but that’s a nice creative approach. If the front edge was cut you could definitely get away with just sewing the raw edge with rust oleum or something compost to prevent rust. I’ll definitely explore that when I tackle the project. Thanks for sharing that idea!!
I vented my dipstick and installed a external breathing system along with complete Air intake system and also made sure to vent my primary on my 2009 TRI-GLIDE and the along with many other upgrades and the results are very good 👍
Thanks for sharing that info!
Hi Ron, great to see a new video. I swapped out my oil pump (to eliminate sumping concerns) to an s&s pump and also run a DK catch can with external breathers. I do not catch very much oil. I only empty and clean the catch can at oil changes (5k) and it’s definitely not full. I wish my truck had that little in the catch can!
Hope you’re loving the hard tail! My spine can’t take that anymore, sadly.
Hey Blackielude91 - thanks for sharing your setup! Glad it's working well. Yeah the hardtail is pretty dang harsh! It has it pros and cons...more to come :)
I'm using the Trask M8 Checkvent to ventilate the crankcase on my 2021 Road Glide Special. I like the appearance of the Trask piece, and it is working great on my bike. I've considered running External Breather System for the Top End but I'm not seeing any oil in the a/c, TB, etc. My combination runs excellent, torque comes on below 2,000 rpm and pulls nicely to around 5,000 rpm. Averaging 46.4 mpg at 75mph highway.
Present mods: Stage-2 S&S 465 cam (full S&S cam chest kit); S&S 2-1 Sidewinder catalyst equipped Exhaust (w/Ghost Pipe for appearance, balance out the back end of the bike); Fuel Moto 3956 Air Cleaner (w/stock OE ventilator cover); HD oil cooler fan; and Dynojet PV3b Tuner w/map by Fuel Moto.
Future mods: S&S 55mm intake manifold (ported by Ward); bore/hone spare set of low mileage 114 cylinders to 4.125" and fit my Carillo forged 10.75:1 pistons (makes a 120 cu. in. displacement with the stock 4.500" 114/117 crankshaft); Dynojet TT-8 Wideband O2 Sensors Kit. Reworked stock heads with upgrades to valvetrain; mild rework. S&S Top End Kit (Roller Rockers, etc.).
Hey T. M. - that sounds like a very nice setup! Thanks for sharing that.
Hey T.M. so you say I only need to do the crank case venting and dont need to be bothered by the still open breather bolts on the top end right? As I understand it works fine for you? I got a 2022 FXLRS and want to keep oil out of the combustion.
@@Andreas-yt9wv I'd suggest to just ventilate the crankcase first (w/Trask M8 Checkvent) and ride some, checking the air cleaner & throttle body for any trace amounts of oily residue (perhaps check every 250-300 miles initially). Hopefully it will be clean, but if not, then you could also go with a Air Cleaner type with Head Breather Bolts that utilize a Catch Can (will need to check catch can every 500 miles, plus or minus, for level in catch can. More than likely, it may also depend on how you're riding, that is if you're riding frequently at high rpm's, then possible you might see "some" oily residue in the air cleaner/TB. Another item, are the Breathers up inside the topside of the heads. Fueling and T-Man Performance offer superior versions versus the HD OE Breathers. I've not researched these yet. My understanding is that you really can't over-ventilate the engine...if both ventilating the crankcase and the Breather Bolts/Catch Can. Hope this is helpful.
@@tommiller8714 great answer, thank you Tom!
@@tommiller8714 Btw, why dont we just close the breather bolts when we have the crank case ventilation installed?
Hey Ron , I have done the vented top cover . I used a stainless bulkhead fitting and cut the inside barb down so not sticking down so far into the oil galley . Ran pipe up behind right hand side Cover installed a check valve under the seat and ran down under the left hand side cover to a small vented catchcan mounted via a stainless steel p clamp to the back of the primary cover . Seem to work fine untill I went for a "spirited " ride and filled the catch can with oil . Oil level was at the hot full mark before the ride and as the vented catch can is quite small didn't lose much oil but made a mess . I have since lowered my oil level slightly to see how that goes . I have a 2018 Fatbob and on the positive side at least my mk1 oil.pump seems to be working just fine 🙂
Hey Dags - thanks for sharing your setup! Nice touch using the stainless parts :) Let me know how it goes after some more miles with that oil level.
Yeh Dags, did the oil level adjustment solve the problem?
I just installed the Trask Vented Transmission Cover. Yes, it's expensive, but it works! It only took 3hrs to remove the stock Cover because all I had was tiny Allen wrenches! Woohoo! Your videos convinced me to go this way instead of the breather mod. I think vacuum pressure is important and felt this was the best option.
Excellent! I’m glad this was helpful. The Trask CheckM8 is a nice piece for sure 👍🏼
@RonsWorkshop , I've noticed a fair number of people referencing your videos on this subject because nobody else talks about this, including makers of EBS. I'm glad you made these videos, as it taught me allot and prevented me from modifications that would've prevented needed vacuum pressure. Thanks for investing so much time! I'm a loyal subscriber to your channel because of it. Keep up the great work!
@FREEDOMGUNNER Thank you for the kind words!
Hey! Welcome back!
I put the CheckM8 on my bike, and pulled the Vent Tubes out of my Stock 114 Oval, and I have practically no oil in the intake issue at all.
Hey FranBunnyFFXII - thanks for sharing that! Clean intake = good news!
Hi Ron, Glad to see your still doing content about the vents. I put a larger two port catch can on my Heritage, (tucked it in the way you did) an vent it with a filter. I am still catching a fair amount of frothy oil so now I'm working on finding the sweet spot with how much oil is sufficient for my bike. Keep up the good work.
Hey T Luck - thanks for the encouragement and thanks for sharing your setup! I’m curious what oil level you’ll end up with.
I did the transmission case cover vent because of your video.
I used clear tubing to see what if anything was happening in the tube and check valve. Pressurized air can get out but vacuum remains.
Hey Len - I like the clear tubing idea…thanks for sharing your setup. I’m betting you that milky gunk in there?
@Ron's Workshop . . . Yes. It was concerning but when I actually checked my oil everything is good. Odd
Yeah I believe it’s mostly condensation with just a tiny bit of oil - but enough oil to make that milky mess.
Thanks Ron 👍 this is a great video
Ron, have you heard of anyone using a brass 1/4 in check valve to relieve the oil blow-by and keep the vacuum?
I think I have - lots of options! Just make sure the opening pressure is as low as possible.
I use an A1 vented dipstick, a diy external breather into a filter to atmosphere on my 131 stage 4 kit screamin eagle (originally 117)2018 cvo roadglide. I haven't done the cam chest upgrades yet but am very close to making the switch to s&s or fueling unless the oil pump your describing is a better choice?
Also relevant according to Baker, my 6 spd, N1 Baker grudgebox has some sumping solution intergrated as well. (Unverified personally) I was happy with my 3 hole fluid change today as all 3 holes had the correct amount of fluid come out as went in last time. (with no more than a 1/2 Oz error of margin)
My throttle body is clean, and no depleted o2 blowby residue🎉
And I ride sportbike hard on my badass performance bagger, 24/7. That cost waaaaaaay 2 much😂
Hey Dean - that sounds like a screamer! As for the oil pump - if you’re not seeing any sumping symptoms you’re probably fine. I wonder if they did an oil pump upgrade with the 131 kit?
hey Ron, I installed the Trask tranny cover to vent the crankcase, I have 2021 Sportglide with 2600 miles on it, my issue is, I had my 1000 mile service done and I'm using Schaeffer Synthetic 20-50 racing oil, great stuff, I had an S+S camplate, oil pump and S+S lifters with adjustable pushrods and S+S tappet cuffs and a Star Racing 30 / 30 cam installed. I've put 1600 miles on it since the 100 mile service, my concern is, I'm burning ALOT of oil, there is no oil currently showing on th dip stick, when I checked it cold on the jiffy stand last week after 100 mile ride, it was 3-4 "dots" up from "add a quart", this past weekend, checked it cold after a 100 mile ride and not a drop on the dipstick, also, let it run 3 minutes per Harley, shut it down and checked, not a drop either on the dipstick, I have 1 month left on my warranty, I have no oil coming out of my A/C ( blow by)or the pod filter from the Trask. I've reached out to my local dealership and they did not seem to be too concerned about the modifications that I have made with regard to warranty work, however, I am extremely concerned, a quart every 1500 miles seems to be excessive, could it be my valve stems / seals, just wanted to get your thoughts, thank you for taking the time
Hey Michael - man…that’s odd. That’s a lot of oil consumption for sure. And you’re right that if it’s not blowing out into the air cleaner or pod filter, it must be getting burned during combustion. Seems like you’d smell it in the exhaust? And if you’re still under warranty I’d press the dealer hard to address that. That’s a bit beyond what I can provide input on, but it does seem like there’s something going on internally. Sorry I don’t have more helpful input - please do let me know what you find out.
You may be sumping... The oil is not being scavenged back to the tank. This will cause a low oil level on the dipstick. The OEM sump plug is too long and can block proper scavenging. Fueling and DK Customs sells the shorter plug. If your bike is sumping, and you add oil you will over fill your engine causing more problems. If your rings sealed properly during breakin, the external case and external head breathers should eliminate blowby. Best of luck :-)
Fueling has released a shorter scavenger plug. What’s your thoughts ?
Hey Charles - I hadn't come across that yet, but I checked it out. I'm intrigued. It's simple concept, but it makes sense. I'd be willing to try it based on what I've seen at this point. Let me know if you give it a try!
Ron, thanks for your channel!! I have an ‘84 FLHT Electra glide. The previous owner ran the crank case breather hose into a catch can, and that catch can is filling up with oil and spewing out the the vent… Here’s my question since this is my first Harley, can I run that crank case breather hose to the oil tank and let the oil that’s being blown out, just dump back into the oil tank and then I could also create a breather for the oil tank? I don’t see any questions about that, but it seems to make a lot of sense to me. Although I’m not the smartest bulb in the box. Thanks again for all your help and all your videos!
Hey John - thanks for the kind words! I’d be hesitant to run that into the oil tank since it could pick up contaminants along the way. Let me know how it goes if you try anything.
I had a 351w ( small block ford) built with a stroker kit thats been burning oil for about 2,000 miles now. People were saying the ring never seated but Im thinking its the crank pressure since its also leaking and blowing oil out the vent at times, and my dipsticks always pushed out.
Thanks for the vid. Im still looking for a solution
Good ole 351! Yeah it’s simple to try a venting solution, and cheap too. You could probably just use a standard PCV valve from the auto parts store.
@@RonsWorkshop yeah, it has a pvc installed but its nowhere near enough. Its 12:50 1/4 mile street car 4spd , im thinking about an old school style vacuum off the exhaust collector to assist the venting in place of the pcv.
My bikes are ktmexc200 and xr250 so no problems there. Thx for the vid, it got me thinking of something new
Yeah, old school exhaust vacuum setup should do the trick.
Thanks for this update Ron! What are your current thoughts about one-check valves in the trans vent line? Any specific recommendations for that?
Hey Randy - I’m a fan of the check valve. If you do both mods the check valve wouldn’t really be needed because the vacuum source would be eliminated. The original check valves I liked are a bit harder to get now. I did some digging and found out that the previous supplier I used no longer carries the check valves, but there is a new supplier. The drawback is they only seem to sell them in packs of 6. Here’s a link to what I found: bit.ly/3GxGyGQ
And here's another one that I have not tried but could be promising: bit.ly/3MgLY9A
Other check valves may work fine, but the lowest possible opening pressure is definitely beneficial (the one I have opens at just 0.1 PSI).
Let me know what you end up with!
I installed the Trask trans cover👍
Hey Dan - that’s a really nice piece! How has it done for you?
@@RonsWorkshop so far excellent I’m been running it now for about 3000 miles and I check the air filter and just a trace of oil. Great improvement
Still running your transmission vent style with a s&s 475 full cam kit , barley any oil in my aircleaner
Excellent! That for sharing that update.
I wonder??? So the new121 VVT deleted the head breathers and vents out of top cover like all of us none VVT motor guys. I wonder if the breathers can be blocked off?
Hey Simeon - that’s a good question. I’m not sure, but I’m confident they’re venting it somehow. Whatever you do, you’d want to make sure you allow for venting.
Question why do you, and Trask think it’s necessary to add a filter or catch can to a transmission top cover vent? If you add a additional vent why not just do a curved hose like it comes from the factory?
That's certainly an option that could work well. My only concern with that would be the possibility of foreign material entering the vent hose.
Ron, as a life long technician I applied that knowledge to this issue
Im using a Ness backplate modified to vent to atmosphere
I have drilled the trans top cover, plumbed it to catch can. The out port on catch can I have installed a Honda PCV valve for a sealed evacuation system.
Seems to work great, I have a slight vacuum at the head breather ports
Care to share your thoughts?
Hey Keith - thanks for sharing your solution! That sounds like a great implementation. I like the idea of adding the PCV valve right to the catch can.
@@RonsWorkshop
I checked the can today, 150mi or so.
Water was the thing found, an it was basically completely clear.
Almost no oil at all to be found
Shut the engine down and remove oil cap, you can hear air entry from from vacuum still present
I believe throttle response is better, hot idle is great cold idle marginally higher
Stock valves are still present in rocker boxes, but plumbed together into an aluminum 1/4" fuel filter for air inlet
@powerhaulic sounds like it’s working well!
Hi Ron! Have you found any information about how much vacuum is a “good” vacuum in the crank case? Is it ok to get the vacuum at that hose above the throttle body in the m8? Great content as always! 🙌🏼🙌🏼🙌🏼
Hey João - no, not yet. I haven't found any solid info. When I tested that vacuum fitting on my bike, it pulled about 9" of vacuum (if I remember correctly). I was concerned that it was too much, but I do not have any facts to back that up. So I'm just not sure. Let me know you find anything, and thanks again for the kind words!
Hey Ron thanks for the great info. I have a new 22 street glide st with no miles yet. Should I do the crankcase vent at this point or will it void my warranty. I know first hand what too much pressure will do. I have a jeep grand cherokee with a 6.4 hemi and after installing a supercharger kit I found out that the check valve on the catch can was defective and would not let any thing past it. The results were oil coming out of the intake gaskets and it even blew out the dipstick. I know this is not a motorcycle issue but it is relative. Vent that sucker! Keep up the great videos.
Hey rlsticks - thanks for the kind words! The question about the warranty is good one, and from what I’ve heard it varies from dealer to dealer. You may want to ask yours to be on the safe side. I’d recommend a crankcase vent of some sort for sure - and your experience with the Cherokee is a great example. Let me know what you find out!
Hey Ron, great information. I planned on doing your diy trans vent tomorrow, but came across a video that had a warning about 19 and prior M8's not having a seal between the oil pump body and the crankcase inside the cam chest and that by doing the vent you run the risk of pushing excessive amounts of oil out of it. I have a 17 RG do you still recommend I do the vent?
Hey Rob - I’ve heard different reports from various people. It might be worth checking how much pressure you’re getting with the plastic bag or balloon trick. If it’s a decent amount, you could try the vent and if you get oil problems you could decide on how to deal with that. Of course it’s easy to seal the vent off but you’d still have the crankcase pressure issue. Let me know how it goes.
Ron, Great Videos! I have been looking into doing the trans cover venting solution that you've done in your videos. I don't want to spend the big money on the Trask, which I think is a quality solution, but pricey. just wanted to give you a heads up. I seen a video lately, where they have a M8 121 CVO motor apart, and he shows that they no longer have the breather(PVC) system in the heads, and are using a venting solution directly done by the moco, in the trans top cover, so there is no venting into the intake. so now that they have done this, I wonder if they plan on doing this to the 2024 model bikes. He does state that they are using a catch can and not just a filter. He doesn't go much further in the video as to say if they are running a vacuume back to the system. I plan on doing your mod here this winter.
I dont have a link to add this, but I think that its a great idea, Keep it up!
Thanks!
Hey Sean - Thank you for the kind words! And thanks for sharing that info as well. I’m glad to hear they’ve made some changes to address this issue.
Thanks for another great video and follow-up on this. I've got a thought I'd like your opinion on if you don't mind.
What do you think about putting two fittings in the transmission cover over the crankcase. Routing the head breathers to one of the fittings and putting vacuum to the other. Would that provide the vacuum needed for the rings to seal and all the other vacuum benefits while keeping the blowby oil mist out of the combustion chamber? This would also eliminate the catch can.
I appreciate your thoughts and opinions.
Thanks again for your time.
Hey Pete & Donna - I appreciate the kind words! My only real concern with venting the head breathers into the crankcase is the possibility of introducing contaminants into the crankcase. I’m not sure if it’s a factor, but it came to mind. Let me know if you give it a try!
Hey Ron I really appreciate all your videos. So far I've decided against draining beathers back into the crankcase. I rerouted the breathers to a catch can and ran the output from the can to the vacuum fitting on top of the throttle body. Do you think that this should relieve the pressure and create enough vacuum in the crankcase? Or should I still consider venting the transmission cover? If so, I was thinking of running the vent to a "T" in the hose going back to the throttle body. I'm thinking this would add vacuum to crankcase and make sure oil was caught in can not crankcase. I very much appreciate any thoughts you have. Thanks
Hey Pete & Donna - I appreciate the kind words! I think you’ve got a good solution, and determining whether or not to vent the transmission top cover is probably just personal preference. My initial thought is that it would likely be beneficial. But if you’re unsure, you could monitor things for a while and then make your final decision after some miles. Since you’ve added vacuum using the throttle body port I don’t believe there’s really a drawback to adding the transmission top cover vent (as in the head breather mod would eliminate the potential for vacuum but you’ve introduced another vacuum source). I’m not sure if that helps at all, but let me know what you decide and how it goes!
Run A1 dipstick also external airbox runs like a top
Thanks for sharing your setup! The A1 dipsticks seem really well made.
Hi Ron, I have a 2007 Road King. I just found your videos once I searched for catch can installation methods. What I am doing is the same as what you've done. The transmission cover, throttle body with same same Arlen Ness filter set up as yours and then a vacuum source at the filter. My question is what is the catch can fitting hole size to the same can your using, so I can purchase the same 90 degree fitting? I can't find the size anywhere.
Hey Franco - these are the fittings I got for the catch can: amzn.to/489LlJc
Let me know how it goes!
I just tried the plastic bag over my oil fill hole. I had no air going into the bag. I have no oil in my intake. This is a 2020 FXLRS with woods 22xE cam. I think I am good.
That’s great! Thanks for sharing the results.
@@RonsWorkshop thanks for the great video’s.
Hey Ron, love the content. I was wondering if you have ever had oil come out of the filter media for your top trans cover? I’m having that happen on mine. However, I did not have a check valve in line with my set-up. I will be installing that valve and see if the issue continues. Thank you in advance
Hey Junior - Thanks for the kind words! I haven’t had any issues with oil but some people have. Where do you keep your oil level? And do you know which oil pump you have (pre-2020 or after)?
@@RonsWorkshop My oil pump is an aftermarket one. It is the S&S oil pump. I recently swapped cams and oil pump.
Ok good. Check the manual to make sure you’re running at their recommended oil level. I’m not sure if they recommend anything different, but it’s worth checking.
Just did a 107 big bore, big cams high compression motor with head work. Bike starts and runs fine. But puking oil from head breather bolts. Checked the coffins and were installed properly. Could the trans breather be a fix also the oil cap breather mod. Please help. 107 twin cam.
Hey Rick - what year is the motor and does it have the original oil pump? And what’s the oil level at?
Neither the crankcase vent nor the vented dipstick are likely to solve that issue.
Where is the swing arm back? How much was the price? Nice to meet you.
Hey Lose Truth - that's a La Rosa swing arm bag. They make many different styles, so the price varies depending on which one you pick. You can find them online, on eBay, in stores - all over the place.
Shame I have to update to the 2020 oil pump before I can fit a vent
Yeah that’s frustrating. Seems like that should be covered by warranty. If there’s a sumping issue they may indeed cover it. I’m just not sure.
Vented transmission top cover. Blowing lot's of oil out. I mean another. What do you think is happening?
Hey Jeff - what year is the bike, and where are you keeping the oil level?
Hey Ron I traded my 22 street glide in on a 23 breakout 117 I see a small rubber hose in the front of the trans cover. Is this a vent of some kind? It does have a small hole in the end of it. Thanks!
Hey rlsticks - on my 2019 FXBB the transmission case is divided into two compartments: one for the gearbox and one for the crankcase. On mine the rubber hose is on the gearbox side, leaving the crankcase unvented. You could try a balloon or plastic bag over the dipstick tube to see if you’re getting crankcase pressure on your 2023. Let me know how it goes!
Installed trask vented tranny cover, now under hard accell i only get oil spit from front breather. Eliminated 90% i know you stated there would still be vapor mist. But im confused why only the front breather and why oil spit on hard accell. Wondering if its not enough oressure relief? New 2024 RoadKing 2500 miles.
Seems like that should be enough pressure relief unless there is something else going on. What’s your oil level? I can’t remember if Trask recommends a lower oil level or not.
@Ron is there any particular spot to drill for the transmission cover for the vent ? Or does anywhere work as long as it's in the crank too oil area ?
Just make sure it’s on the crankcase-vented side of the housing (not the side with the little rubber hose) and the fittings have clearance inside.
So if I just purchased a 2019 FXFBS, is it in my best interest to upgrade oil pumps along with these other mods?
You might consider doing the crank sensor sumping check before going that deep in. Of you have no symptoms and get very little oil you’re probably fine. ua-cam.com/video/F2N7kwCspQE/v-deo.html
Hi Ron. I did the trans cover mod. I used the check valve you recommended and today when i got home from a 50 min ride on the exspressway, doing about 75-80mph, i noticed oil dripping from the breather. Its a 2018 107 M8. Probably has the old oil pump in it. I have not done a sumping test. Could it just be a fluke or do i have problems? Thanks, John.
Hey John - it’s hard to say. What’s the oil level at? You might want to go ahead and do that sumping check too. It’s easy and quick but just a it of a hassle because everything is hot when you do it.
@RonsWorkshop I will do that, thank you! And thank you for all your great and informative videos.
Me again! Do you have any experience with the fueling billet head breathers?
Hey João Maurício Basile de Souza - no, I haven’t done anything with them. Let me know if you try them!
Hey guys, me and @Tom Miller were debating the crank case venting in a comment sub section. One question remained: Can we close the breather bolts once we installed a vented crank case? It would be easier than installing an additional external breather and pressure would escape through the crank case vent. Do I miss something?
Sure you could close the breather bolts. You will likely still get some oily residue, but much less than you’d get without any crankcase ventilation.
@@RonsWorkshop oily residue due to oil being pushed along the threads?
Oh I misunderstood - you mean replace the breather bolts with standard bolts? Yes that should be fine and would make sure there’s no oil in the throttle body.
@@RonsWorkshop thats it! Standard bolts instead of breather bolts and venting the crank case is what I ment. ...Today I am thinking that it might leave me with no vacuum inside the engine due to no source if vacuum. Well your Videos really do cover it all 👍
@@Andreas-yt9wv If you put standard bolts in there wouldn't it build up condensation all the way back to the plastic breathers in the heads? I have a catch can and it gets a lot of water (condensation in there). With the bolts you're talking about I would think blocking the plastic breathers in the heads would stop the whole channel through the block filling up with water and sludge! from Breathers in head to bolts at air cleaner. Water would have nowhere to go.
If you have the trask transmission top cover can you block of the breather bolts?
Hey Chris - I wouldn’t have any concerns about that since the crankcase is vented.
Will trans cover venting void the warrentee?
Hey Nelmar55 - from what I can tell it varies by dealer. In general I’d expect them to look for any reason possible to void the warranty, even though venting the crankcase actually helps engine life.
How do you decide to where to drill hole for barb in transmission cover? Thx
It wasn’t an exact science when I did it. I just checked the depth of the hose barb and made sure it wouldn’t contact the case when it was mounted.
@@RonsWorkshop ok. Thank you for your time
Is these mods per M8 only or will they work for a 96 or 103.
My 09 streetbob is blowing oil out past the umbrella valves even after replacing them with new ones. S&S 585 cams.
Hey Ray - I don’t know how similar the twin cams are. I’m sure crankcase venting is beneficial for them as well, but I’m not sure of the best location for the vent. Let me know what you learn!
The 2024 baggers have a vented trans top cover.
Much needed! How did they do it?
@@RonsWorkshopit routes up the rear cylinder, over top of the engine & into the intake.
@hydroboy35th interesting. I don’t love that it’s routed back to the intake but I suppose they had to do that for emissions, to the gasses being vented with to filtration. It’s definitely better than no crankcase venting!
Do I understand correctly you said you're using both the transmission vent and the external breather into a catch can and then back into the tube into the intake?
Hey DylanDream - yes, that's correct. Although it would be about the same just venting the catch can to the atmosphere. The point was to get vacuum from the intake tube, but I haven't really been able to measure any vacuum from that source.
@@RonsWorkshop Do we need this vacuum? One of the main reasons was for ring seal and if rings are sealed properly on break in I would think you wouldn't need constant vacuum. I have to look it up, but look at the shovelhead it vented to atmosphere, now did it have vacuum as well from top end?
@@dylandream2248 I posted this on your other question as well: Even with proper break-in there will always be blow-by that gets past the rings. And as mileage and wear increases that blow-by will likely increase as well. The vacuum just helps with ring seal and also benefits the lubricity of the oil by reducing aeration. That also helps the oil pump more efficiently, helping keep sumping in check. In general, the engine will before better if the crankcase is under vacuum. I'm not familiar with the shovelehads, so I can't comment on those.
I see a difference on my 2017 ultra limited I have breather bolts to a catch can and trans top cover to intake one way valve with fuel filter oil went from being aerated to no air at all oil reading on hot went from 4 dots to 7dots
And cold checks went from 3to 4 dots and now always at 5 very happy all stock no updated oil pump transmission levels always the same
@@robbysowells3099 Thanks for sharing your setup! I'm glad it's working well.
When are dealership mechanics going to train for this crankcase pressure?
They are aware of it you say……
Not the mechanics where I bought my bike.
They must of been sleeping that day in school.
I have a brand new bike with an oil leak that happens after a good ride. They took the chain, and front sprocket off, started the bike and put it in first gear.
Then said, see, it’s mint leaking.
Either they’re stupid or they don’t give a flying fk.
I say they don’t give a flying fk.
That’s frustrating for sure. I hope they stand behind it and get your bike sorted out!
Yes, I deal with it by not F'ing with it.👋👎