Briggs & Stratton Engine Valve Seat Repair - Video
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- Опубліковано 27 вер 2024
- Briggs & Stratton Small Engine Valve Seat Repair
In this easy to follow video I show you how to fix a valve seat that has popped out of it's location. You will also see the steps that led me to this specific diagnosis and repair.
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Easy to follow and thorough step by step tutorials do it yourself (DIY) to help you with your broken lawn and garden equipment including snowblowers.
I do my best to teach you how to easily diagnose problems the fastest, quickest and most efficient way with real repairs beyond just replacing a spark plug. These tips are for both the homeowner and shop owner.
Whether it be a handheld, two stroke, two cycle engine like a chainsaw, weed eater, weed wacker, string trimmer, grass trimmer, line trimmer, hedge trimmer, strimmer, brush cutter, leaf blower, or four stroke, four cycle units like a lawnmower, wood splitter, lawn tractor, snowblower, pressure washer, generator or a ride on mower that needs parts installed or replaced, I’m your go-to guy.
My favorite brands of spark plugs are NGK and Champion and are the ones I recommend.
I’ve been a small engine mechanic for many decades and also run my own repair shop so my videos are loaded with tips and tricks that I have learned and want to share with you. You will also find many tool and product reviews from top brands on my channel as well.
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Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DONYBOY73 “The Small Engine Doctor” assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DONYBOY73 “The Small Engine Doctor” recommends safe practices when working with power tools, hand tools, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DONYBOY73 “The Small Engine Doctor".
Don, great video. It's so good to see you doing complete fixes. I know it's time consuming to film these types of repairs, but it's so much appreciated. Keep up the good work!
Too bad he is not at least 95% thorough!
Exactly - it’s tough enough just Living ...
A joy to watch, almost hypnotic watching a man who is well versed in his trade.
The Brothers got his -- together 👍🏻👍🏻👍🏻
And Don is a gentleman too.
You could “sweat fit” the valve seat in by heating the head in an oven or bbq grill, and chilling the seat with dry ice or regular ice. It should then just drop in. I would still peen the metal over to lock it in place. Nice video !!
That seems a bit extreme! No problem with cracking the head or breaking the valve seat? I put the valve seat (ring) in the freezer for a few minutes and used a propane torch around the exhaust valve area.
Wow, I never knew a seat could break loose! What I love about your channel is your an excellent mechanic and sometimes you pull off little miracles. Definitely one of the best mechanics on youtube! How the hell do you only have 207k subs?
because I don't use clickbait titles and thumbnails
I saw Mustee 1 do the same type of valve seat repair. He claimed nothing is certain about fixing the seat like that@@donyboy73
the trick with the center pin is GENIUS! i have never seen that before - top vid!
I do appreciate these videos when im trying to figure out a problem and reach a point that im lost i know i can turn to your channel
Thanks to people like you I have learned so much. I fix my own machines without worry.
Owesome Don. Learned many things from ur videos.
Great video. I've found the best way to seat the valve seat is to put the valve in and tap on it with a socket. This ensures that the valve will seat evenly in operation.
Exceptionally clear video on valve adjustment-- an area most engine repair videos do not even attempt. Not only did you show the problem condition, but exactly how to adjust the valves and lap them properly. As a bonus, I discovered I do not need a valve spring compressor or other sophisticated tools. This video covered a woefully overlooked area in our developing knowledge of small engine mechanics, and without your careful, explicit instruction, many of us would remain in the dark.
This guy is a genius
WOW! I am very happy I found this video. I have a 1978 Wheel Horse D200 with a Kohler K532 engine. It's been running great until about one month ago. While removing snow with the snowthrower on the front it suddenly lost power. I was able to park it in the shed. A week later I found zero compression in one cylinder. I feared a possible broken connecting rod, or possibly a broken valve spring. I never considered a valve seat like this. The engine turns over easily so I'm going to investigate the valve issue first. This video is the perfect instruction for this repair......I just pray it's this and not the rod.
Thank you!
Like like thumbs up! That valve seat won't pop out again. good video.
Man this guy is way better than any small engine guys on UA-cam including Bruce Pender
I like ed bassmaster too
There's four top techs on UA-cam that I follow. Donyboy73 is the Boss.
thanks lol, do you actually do HVAC and are you in Ontario Canada?
Ontario County, New York State. Just south of Rochester. Don, you have a problem with your furnace? Maybe I can talk you thru. Lord knows, I owe you some info!
furnace in my house is 20 years old, still runs good though, it's an olsen high efficiency - natural gas. I was just wondering what the max life span is
this is literally the most useful mower repair video ive ever seen in my life thank you so much for taking the time to make it
I have owned a Craftsman 18HP intek for 13yrs now , still runs like new.I haven’t had to go inside the motor yet, an watching your videos will really help when the time comes to. I just love how these motors can be fixed & resurrected back to life.
I can tell this guy really knows what he’s doing gives you a good view and a good explanation and I really enjoyed it and learned a lot I mean he doesn’t fall around like others fix Tyrell fixtures at all and I’m a very serious person I preferred this way
I've seen a few people now working on lawnmowers and I just want to say dons videos I think are the best and this guy knows his stuff. That's why I'm now only going to watch dons videos and I can say I love them, I only buy broken engines from any thing has a hobby myself but find it so unwinding to watch someone like Don working on them, don't stop making them kind regards colin from croydon surrey England 👍 👍 ❤
Great video!! Wish I had stumbled across this sooner! I just pulled a 18.5 apart with the exact same problem. Didn't think it could be repaired so found a used head on eBay. Definitely would have tried this first. I'm still gonna try this repair and keep it for a spare. Thanks again for the great info!!
one of the best technician what I ever see. Because I hate dramatic technicians.
In my world of tool & die making we call that a $ 60,000 dollar a year ping man ,seriously in 45 years of tool making I have done this to solve and save many tools good job !
I've never seen that punch trick before, of course never had this seat problem, good vid.
been in the briggs manual for years
I've seen Mustie1 do that before.
Edited perfectly. Doing the same job on a flathead Kawasaki minus the valve seat. Thank you for your time.
This is how a mechanic could help someone who hasn't much money to buy brand new one set cylinder head. Nice effort.
I've said it before but I will say it again, your videos are superb. Thank you.
thanks man
definitely one of the best small engine mechanics I know of.. excellent video and presentation.. JD
First rate tutorials. I'm a second-rate DIY mechanic and every minute I watch is a minute I save. Keep it up just like you're doing it now. Thanks.
Me too - but I call myself a shade tree Mechanic 👍🏻
I'm french and i don't understand all the things you said but that was very clear and instructive !
Thanks for that good vidéo !
je parle francais aussi
@@donyboy73 c'est stylé ! Comment ça se fait ?
Had the same problem on an OHV16 Tecumseh last year. Did same procedure but as you said no guarantee. It lasted almost exactly 1 year and threw the seat again. Had to put in a new head. The owner was aware that it might not last and was ok with it. Nice job with the video and explaining the process
I've watched Dony do this a couple of times now on different mowers...I don't even own one 😉. Top man and very knowledgeable, he make every video enjoyable ❤️️
He is the Best I’ve Seen 👍🏻👍🏻👍🏻
good fix , thanks . if you don't have the lapping tool and compound , you can chuck the valve stem in your drill and use soft scrub or a similar product .
great video... straight to business and no suffering through endless monologues
no bs here lol
You came highly recommended by AlchemistLair and I'm glad he did! This could be the fix for the Briggs and Stratton on my Craftsman self-propelled push mower. It has Zero Compression after its 2nd use of the 3rd mowing season. Briggs and Stratton small engine quality sucks since manufacturing was moved to China!!! I never had any issues at all with Craftsman self-propelled push mowers before this one. Thank you, Dony!
also check valve lash
@@donyboy73 Thanks!
We were taught in military maintenance school to torque 3x. If final value was 90 ft lb the 1st torque = 30#, 2nd = 60#, 3rd = 90#.
Sequence was the same, start in center, crisscross, work toward outer edges so metal stress movement wasn't impeded by an already torqued fastener.
Great vid as always. Been a small engine mechanic for 12 yrs and if I ever have an adjustment that far off I make it a habit to remove the push rods and check them before I even setting the lash.
Or some kind of compression check.
Ok nice job 👍. Years ago I started out as a lawn mower mechanic. Working for Sears. That was 30 years ago. I'm retired now.
Wow your good, thorough and well presented, I learned more here than I thought possible. Didnt think I would be capable of this you make it sooooo easy Thank you
Good video, one very important note:
This engine comes equipped with a compression release on the cam, the valve adjustment needs to be performed with the piston 1/4" past TDC on the compression stroke for the release to perform properly. The starting circuit is not strong enough to bleed off the full compression on the cylinder during cranking speeds. Lots of starters and batteries are mistakenly replaced due to this procedure being overlooked. If an Intek of this style is locking during cranking, follow the valve adjustment procedure with the piston in the proper position. This series is notorious for either spinning too freely (lash too tight) or locking (lash too loose) during cranking, the proper valve adjustment is critical.
That's excellent info.
I have a valve issue I would like to discuss with you
I have a B&S 331877-0036-G1, I see the same thing in the B&S repair guides to adjust at 1/4 past TDC. I've read mixed results on the technique. Many people say Don's method always works while other people have problems doing as B&S recommends. I'm working on my mower now and not sure which approach to do.
Every thing I have read about RTV is to let it set for 24 hrs to cure before letting the motor oil contact the RTV. And since I have been following the directions I have not had one leaker to come back
Nice video! Perfect speed. Thank you!
Excellent video.
Great work.
100,000 subscribers congrats Dony
Star man donny.
Another good vid brother, thank you.
Wouldn't start, turns over easy. Just like my Kohler K241AQS engine. I also had lots of blow by in the crankcase. Almost was blowing the dip stick out. Broke down engine for rebuild and found the exhaust valve has been leaking. Rings are warn with end gap almost 1/4 inch, but no ridge at the top of the cylinder wall. Going back together with standard size parts and new valves which will be lapped in. Your video is spot on. Thanks for sharing.
That's a real small engine mechanic there. Skill and years of experience.
EXCELLENT camera work, lighting, sound. Sound is clean, no wind or background noise. Vocals are clear, concise. I am hoping I don't need to go this far but I will be following this video if I do. THANKS
You do the valve clearance adjustment exactly like I do for years! Never go for TDC👍👍👍
Man, I actually went to a lot of trouble signing in just to give props to you for a very clear instructions. Thanks man! *Subscribed.
Thanks for making this repair procedures . Your close up screen shot are great and detailed. It would also be helpful if you can list all the tools you used . Thanks again .
I cant believe a new head is 2 to 3 hundred dollars..I've never had to buy one..but I know you know..good repair and good video..thanks Don..Cheers 🍺🍺🇺🇸🇺🇸
Great Video
Thanks for the video. Runs great. 👍
I did this same repair on a B&S twin 18 hp 15 years ago, and it is still going strong.
WOW Amazing 👍🏻👍🏻👍🏻
Don, congratulations with hitting 100k subscribers!
Thank you so much for the longer video on diagnosing, and repairing a Valve Seat. Well done!
Cheers! :-)
Loctite makes a high temp seat and stem retainer which would have worked better than doing that to the head, not that what you did is going to hurt anything, small engines are pretty forgiving. Just something to keep in mind for the future. Thanks for the vid. Loctite 640.
640 is only good up to 350° F
Great video Don. That seat is there to stay. That is great you mentioned to the owner that this may not last forever but it most likley will last a long time.
I enjoy watching you work! My first repair was a helicoil on a 1950s 2 stroke HD head back in the mid 1960s and my hobby and livelihood is anything to do with tools. I picked up quite a bit watching your techniques. See there you can teach an old dog new tricks, if he will just watch and listen Thank you for time you spend at this.
Your videos are awesome for an engine dufus like me. Great job and much appreciated.
My dad is a automotive machinist I grew up working on all motors red lock tight then punch will keep it there for ever but we would count out the head and install a over sized seat point being very nice job donny.
I always learn something new here. Thanks Dony.
Good job brother 👍
Don - You just can’t beat that, you tha Man 👨 thank you very much and Im still buying you a beer monthly 👍🏻👍🏻👍🏻
Great fix! Glad to hear it is still workingafter all this time.
Excellent explanation, thank you for sharing your video 👍👍👊👊🍺🍺
Great video and thank you
Very good video. Content was clear and easy to understand
excellent video, and good edits. Thanks
Donny boy is awesome. Just helped me with a head gaskey repair and timing of my engine. Thanks a lot.
Yes he is. 👍🏻
Only thing I might do any different is to test it for compression and running b4 complete assembly. You know what your doing and your confidence shows. Thanks for the awesome video!
Love your videos
Good job donnie
I had to repair a similar motor for someone only they drove it around ( the motor was on a ride on lawn mower) with it burning heaps of oil as the head gasket was blown & sucked in a lot of oil from the crankcase.
They also were sold the lawnmower for $1000 AUD second hand in exchange for their old mower with a blown Briggs motor on it,well,the mower they bought had loud tappet noise as if it had never had a valve adjustment.
Well,the exhaust valve stem tip wore out,the spring retainer fell off & the valve fell on top of the piston then pushed the valve through the cylinder head.
A brand new B&S cylinder head kit was sourced for a bit over $200 AUD down from $300.
After I fitted that,the engine ran like new again with no more smoke.
That valve repair is a very clever repair,more clever than my dad sometime like the L36 Buick V6 motor in his car needs a valve job or at least another cylinder head,the compression is o.k. except for number 2 cylinder where the exhaust valve & seat has suffered badly from valve recession as liquified petroleum gas makes the engine run leaner.
Well,the exhaust valve head probably warped when it was held open on its exhaust stroke.
The engine is losing oil through its front & rear seals so doing it my way would be cheaper,he wants to replace the motor & he wants my help.
My point is why should I help anyone who doesn't want to listen to what I have to say to the point that they think I'm wrong ????
congrats on the 100k mark you work hard for it
Great video!
good job danyboy .
Hi Don, love watching all your videos.
One reason for a dropped Exhaust Seat is an over heated engine. Always check for grass packed in around the cylinder cooling fins or a plugged flywheel cover screen. Great video and keep up the good work.
Cheers
Willy
I was just going to ask about reasons and/or causes. this answers my question. Thanks!
Good point.. who'd have thought? So the head expands so much that the ring pops out. I usually blow the tractor out with compressor hose after cutting..now I'll be sure to be very thorough around the engine block.
I forgot to mention if you have equipment stored out side watch for mouse/squirrels building nests inside the cooling shroud and around the cylinder. Willy
i know this is an old video but it is awesome great job donyboy
That fix will last a long time.
You're a great teacher, excellent video!
EXCELLENT VIDEO! Thank you for uploading!!!!
Good job as usual Donny. Thanks for the video.
I have always adjusted the valves 6mm past TDC on the compression stroke. and I set the gap at.006" for both inlet and exhaust valves. this has solved a lot of the starting issues I get with customers mowers. saying that, I appreciate your video and your channel as it has helped me with other issues in the past. thanks :-)
Great job, always amazed by your expertise.
Helpful detailed tutorial once again! Great filming and very good pace! Thank you Don 😁
Awesome info, wish I'd known the tapping trick many years ago
That's one complete tutorial, well done.
nicely done!
Great video and very step by step instructional. Now I am going to practice on and old engine.
thanks so much great video
Great video. Very professional. If you were local I would take all my small engines to you. I have a riding mower that I'm thinking of tearing apart. It stopped while mowing and won't turn over. Don't know if it is locked up. Afraid to look. I'm retired and not much to do so may as well tear it apart. I may be able to fix it. If I run into problems I will contact you. Thanks for sharing.
The engiine was overheated at some point. That is what usually causes valve seats on those engiines to drop out.
I always use Loctite sleeve retainer when installing a seat besides the center punch
An excellent step by step process cool and calm presentation. Super cool individual with explenaitions. .
I torque in 3 steps. 5, 10 and 18. Remember that is soft aluminum. Would also sand the head on a piece of plate glass, especially on Briggs Intek engines know for eating head gaskets.
Great troubleshooting video, I learn a lot from watching. Thanks Donyboy
Nice work
I have used staking on mine that keeps popping the seat out but doesn't hold anymore so now to use some Seal-Lock.
always enjoyable Dony, thank you ...
Don, previously when I’ve seen you and others adjust valves, there’s an emphasis placed on making sure the piston is at TDC during the compression stroke. I really didn’t see you do that specifically, at least initially, in the early part of the video, and I assume you just know it’s at TDC as you rotated the flywheel. An experienced technician like yourself, i guess, just “knows” where the piston is as you watch the valve stems and rocker arms move. I’ve seen other videos where screwdrivers, wooden dowels, or other objects are placed in the cylinder through the spark plug hole to confirm TDC. You obviously do not need that crutch. Thanks for sharing your expertise with the less knowledgeable and experienced. Your time and effort is appreciated.