Replacing the PCV System on a BMW V8 Engine Part 1 of 2
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- Опубліковано 22 вер 2024
- blog.BavAuto.com -- Failure of the BMW Positive Crankcase Ventilation (PCV) system is a common problem that can lead to catastrophic engine failure. In this two-part series, Bavarian Otto shows you how to do it yourself on a V8 engine and save hundreds of dollars over what a dealer would charge. Everything you need for the job is available in our online store at www.bavauto.com/ (For our video showing how to do this on a BMW 6-cylinder engine, go to blog.BavAuto.com/go/PCV.)
Highly recommend wearing a Breitling Navitimer while completing the task.
I have performed this job many times. One clue that the diaphragm is ruptured is the engine will "moo like a cow" upon shut down. It is true the Dealer will tell you that you need to pull the manifold and also tell you that it is required because "there are new updated manifold gaskets to be installed," bull. Those torx machine screws that hold the valve to the back of the manifold are very tight and the recessed portion of the screw is not very deep,one slip and you damage the flanks on the screw and you may end up pulling the manifold. use a torx bit with the newest,sharpest "teeth" on it you can find.
I was taught how to do this job at a Dealer that did not pull the manifold to make this repair. I moved to WI and was dispatched this job. They never said how I was to do the job but when I got it done so quick they asked "how did you do it". I told them I did not pull the manifold. They took some time off because of this (customer pay job). This is simply what happens when a shop gets a long term employee in a decision making position,an employee that did not have the needed hand dexterity to do the job so he lied to customers and management and said manifold gasket replacement was required.
Some techs like to call this valve an "oil separator"for some reason. I always called i a "crankcase vent valve".
bloody true - stripped the bottom two screws! i had to break the valve and the take screws out using vice grips! i had a new complete PCV (03 X5)
Dan R yes sir I just finished and engine is whining like a cow and it looks like it comes from the intake any ideas what I can do to fix it?
It's an oil separator in my e39 m5. No need to replace just a thorough flush with parts cleaner is needed
Good thoughts. Thank you for sharing. We have added a note about replacing the bolts, on our listings for the kits.
if the car starts but turns off if i take my foot off the gas could this part be the problem?
I tried this on my 95, 740il. The screws were so tight, that of course they striped. Called the dealer, and they wanted, $875 for the repair, so I did it myself. When I actually took the manifold off, the screws were so tight, that 2 of them wouldn't come off with vise grips. I had to use a grinder and cut the piece off. It took a whole afternoon just to put the part on the manifold. Just wanted to share this. In some cases it might be easy, but if your not lucky, you'll have a bad day.
great video. I took the oil fill cap off and the motor ran like a champ. I knew it was the osv valve. I was ready to scrap the car. LOL. Hey, 23 years it lasted. Not bad. Great video. yes, the bottom 2 torx screws are a pita.
Would the pcv prevent car from starting after long term parking of a year or maybe a dirty maf?
The PCV system should not cause a not-start, with the following notes: If there is a major vacuum leak due to one of the PCV hoses being cracked and open, this could cause difficult starting. If the PCV oil separator is clogged, this can cause major amounts of oil to be sucked into the intake and the cylinders, causing a hydraulic lock. In this case the engine would not crank (or turn over).
This is an excellent video, thank you for sharing the detail process.
You do not have to take off the whole valve, i just reach back with a straight screw driver and pop off the round cover that holds the rubber diaphragm , its a 5 min job.
Thanks SO MUCH Nathan, you saved me hours of frustration with this simple fix of the seal & cap, Cheers!
i am happy it helped, thanks for watching
Too true this make a simple job complicated or perhaps he's a mechanic would charge you a small fortune for a job you can do yourself
Thank you for showing this replacement with the engine IN the car. That seems to be the hardest part!
Would this be the, "55 Activation, Secondary-air valve" coming up on my C110 code reader?
I have 1995 BMW 740il i completed this with that exact PCV. when i pulled the old one off and it looked the same except it doesn't have the middle black nipple. instead the old one is smooth. when i put the new one on and put everything back i heard loud hissing and then the car stalls. could that center nipple be the reason for the hissing?
All parts needed to do the repair, are in the kit. You may, however, wish to order the short vent hose (# 11 61 1 440 126) as this may be brittle and crack or rip while being removed. This applies to the V8 M62 engines from 99-on (540i, 740i/iL, X5 4.4 & 4.6is through 03).
I replaced one before and is there a recommended interval time frame to change them? I did it slightly different, I took just the center piece off and replace it with the new one without having to take all that other stuff apart. After seeing your video I think it be wise after a few times to replace the entire part due to the gasket on the back of the manifold possibly being crystalized.
Is the PVC same for the M52, 6 cylinder engines?
if we already put the pvc back on without making sure the tube is properly connected, how will we know if its connected or not?
Could the cyclonic oil separator valve behind the timing cover also cause oil in the throttle? I am a little confused on how the system works... I have oil in the throttle body and I took off the osv like in this video and inspected the diaphram put my diaphragm wasn't that bad, a little dry and bumpy (definitely dirty and old) but no cuts. What else could cause oil in the throttle and manifold? I will replace the pcv anyway since it is off already
Thank you! I would of never known about that tube so now I know to be careful on my vehicle
Yes, the check valve assembly certainly could be at fault. We would also check the condition of the spark plugs if it has been using the oil for a while. Additionally, you should clean the MAF with our Mass Airflow Sensor cleaner. You can see it at bavauto.com ... part number 05110
Great video as always. Will you guys be doing a chain guide replacement video for this engine? Mine went out and would love to grab your kit and get to work!
Do you lube that red gasket with silicone grease or just install it as is? BTW is there any benefit to removing the cowel and the firewall first?
Great video, thank you.I did as you said with the gasket replacement but the service engine light is still coming on.Quick question, the tube you refer to inside the manifold, I didn't feel one after carefully taking off the plate.All I felt was a hole where the nipple, presumably, butted up against. Am I supposed to be able to actually feel this tube? If so, why can't I...could it be disconnected inside the manifold? The BMW dealer said the smoke (test) was pouring out through the plate...?
I think that the bolts are actually RIBE head bolts. The Torx T-30 works but is always in danger of stripping the head. A ribe head socket will work much better and have less risk or stripping the bolts. These are the only ribe head bolts that I know of on the M62 or M62TU engine, and I think that they are a legacy of the original supplier of the intake manifold back cover.
+g mak
I would just add that many replace the ribe head bolts with hex head bolts of the same size for future. They are M6 x 25 size.
@paulcomi
Good comments! Thank you.
I have a 97 e38 and I just changed the intake gasket at the recommendation of a failed emissions inspection. The problem still exists and I'm wondering how to test if the pcv system.I'm kicking myself for not changing it with the intake out of the car but can't cry over spilled milk.I am a very minor backyard mechanic.In fact I'm a disabled auto body man but still do my own repairs due to low funds.I hear a whistling when driving at times.I also notice a large white cloud coming from the exhaust at start up from time to time but not all the time.I have a check engine light on and have no scanner to check for error codes.It also has a ticking that I'm told is common for the e38's but unplugging the coil packs doesn't drastically change idle.The car has almost 200,000 on it.In your opinion is it worth changing the pcv system valve.I don't know how to check valve other than to replace it and see if problem subsides
How come on your website the Crank Valve Kit includes an O-ring and a Cap that you do not use in this video. Do i need to use all that or is just replacing the gasket and intake manifold rearcover (like you did in this video) fine?
Hi!!! I have question about that thing! What if shut at all pcv?
Typically how many miles before they start to go bad?
I tried and the tube came out, do I really have to take the cover out to put the tube back?
Could you tell me what the two upper hoses go to on that assy.? My 94 740il has these lines blocked off, not sure where they would go.
Hello, ihave LandRover LR3 V8 4.4 and its leak from PCV and VVT , do sell the parts ? Is there video for my car ? Thanks
Just finished but the engine sounds like a cow whining looks like from the intake
Any ideas how to fixed?
does this work for an 525i with smoke and engine pressure light
I have a 95 740i ND I noticed the pcv valve dosnt have a center nipple and the manifold dosnt have a pipe going through the middle
The earlier M60 V8 is slightly different from the later M62 V8 shown.
Nice video ,could you tell me what does two Hoses with the yellow clip at the back of the crack case are connected to or could be trace back too.
I have a 2001 540i my hoses aren't connected to the crack case and its difficult trying to find out what hoses or where the hoses are. I'm debating on taking off the whole intake manifold looking for these hose.
Mine got similar problem. And the big hose was connected to the brake pump, is this a correct fitting ?
Hello im curious if this part could be my problem with my 740 il as well. My car runs very rough and seems to be blowing blue smoke, i know its burning up the oil and seems to be going through fuel as well faster. It will cut off some times when i stop amd has trouble taking off seems bogged down if you will.. would this part being faulty cause these problems. I work on mu own vehicles bc i cant afford to send the bmw to a shop with their high costs. This one seems like a simple enough fix. Shan
Hello i have a bmw 540 2000 and i use the scan tool and i have the engine code p0011 wich is variable timing solenoid.can you help me and show me where is located the part at the engine?i aprecciated your help.thanks
The hiss is a big vacuum leak I'm pretty sure that nipple thing was stuck on the tube you should of removed it off before installing the valve. I understand this comment is 3 years old but yeaaaa...
In order to help you out, we really need more detailed descriptions of all of the symptoms and problems ... and exactly how and when they are happening. Additionally, have you done any work or diagnostics toward solving this issue? Have you used a tool to check for any stored engine fault codes? For further assistance, please email to us at info@bavauto.com .
Yes, the tube can indeed become disconnected from the forward manifold cover (throttle body mount plate). If you remove the front cover and throttle body, you can check this .... and it's much easier to do. You will need a new gasket for the cover and for the throttle body. We have these in-stock at bavauto.com or call at 800-535-2002.
Is there a part 3 to this video? My tubes came off the front of the intake and I don't know how to put them back on?
i have a 98 740il i thought i had a radiator leak .i have changed the radiator and put a new fan clutch but still its leeaking towards the passenger side firewall but not going into the car just leaking and steaming white vapor what could it be need advice!??
check the hose below the rear ccv , notorious for leaking only when pressurised
Hi. Thk you for this video. I have 04 bmw 545i n there is white smoke when I idle not all the time. Would this process help? Thk you.
The N62 engine in your 545i is totally different from the M62 shown here. On the N62, first try replacing the crankcase ventilation valves, on the valve covers. If this has no effect, you may have faulty valve guide seals ... which is common on the N62 engines.
Crankcase ventilation valves - blog.bavauto.com/9477
Thk you, For responding...
Bavarian Autosport
you shoulde change valve seals
hello .
i have a problem that i need help with .
i have the same bmw but 540i tring to replace the pcv as well but the bottom right 3 torx bolts are stripped what would be the best thing for me to do at this point?
Many people are able to remove a stripped bolt using a small pair of needle-nose vise-grip pliers. A "last resort" option is to break apart the cover to gain more access to the bolt.
Hey thanks for video what if the screw is stripped what do I do?
I have the same question. I stripped the screw at the bottom left of the cover. What would you do now?! I read that using a ribe bit instead of the Torx T30 would force the screw out. Any advice ?
Well I tried the needle nose plier! Not enough room!
So I'm going with taking off the intake manifold now ...
Any advice on that anyone?
I carefully cut mine off with a reciprocating saw, I separated the ccv from the throttle body with a small flat head I had two torx bolts left ,was able break the plastic to expose the bolts and use a miniature grip pliers to unscrew the bolts.
1 out of 10 that you can remove it this way.
Almost impossible in high mileage vehicles,
Bolts are usually torqued to oblivion.
The chance you going to strip at least one of them is almost certain.
I strongly recommend to remove intake.
Might be even faster.
I’ve done over 300 of these engine since my heydays in Bmw Autec in Prague so take this advice.
Ill try the little vice grips just incase that doesn't work how would you suggest to break it off !
Now if I do break it off will it ruin the housing for where the bolts sit in?
We have never had to break one apart. We would suggest pry tools and pliers. Just be careful not to damage the intake manifold itself.
what we did was; use a sawzall, very carefully, with a long blade. Started at the top right standing working from the left side, and just trimmed away all the plastic above the bottom screws. then the big vice grips worked easily and quickly. Like firing a weapon, be sure of what is behind, and don't hit that.
Eric Fullerton
- Good input
Horn Like Sound from New CCV
I just changed my CCV on 02 540I M6. I had to pull the manifold off due to the bolts being corroded. Cleaned and inspected the manifold and made sure the tube inside was secured. I am now getting a low horn like sound... has anyone had this problem. The metal tube was attached and secured and no cracks in the small hose on the back or under the manifold going to oil separator. -Thanks
You have a vacuum leak at some point. Perhaps a faulty diaphragm in the check valve.
where can i get a little ratchet like that??
listen to vladamir,he knows his shit.right arm!
I need help with my BMW 740 IL
i have a 1999 540i is it same as this video? some cold day it starts fine but idle is very rough and when is hot seems normal.
when driving and accelerating it makes airy sound like pushing air out or sucking air checked with auto parts store and shows none of cylinders firing and told maybe some vacuum leak problem. is this same PCV problem or any other problems i can see very lite smoke from back of manifold near intake cover.
Thank you very much
Yes, you can use this video for the 99 540i. Your symptoms certainly could be due to a faulty PCV check valve assembly. The smoke may be from an oil leak at one of the valve covers., unless the check valve cover is cracked.
99 540i PCV check valve kit:
www.bavauto.com/fland.asp?part=M62%20CVRK%2096
BavarianAuto Thank you very much I purchased repair kit and installed but somehow more smoke came from passenger side valve cover and engine runs rough and vibrate a lot then alaram goes off.
What could it be?
Joshua k
Can you explain in a bit more detail, what you mean by "more smoke came from passenger side valve cover"?
BavarianAuto its left side of the engine before i replaced new pcv system very a little smoke came from left end back side of engine but after replaced a lot more smoke came from whole left side of the engine.
it seems running fine then runs very rough and vibrate a lot and then the alarm sound goes off real until turn the ignition key off but if turn the key on then alarm goes off again. it scared whole family... lol but not really funny,,,
i checked oil level but was good.
did i do something wrong to install or any other problems?
thank you very much for your help
Joshua k
well, it's hard to really say what's going on, without having the car here. You need to locate the source of the smoking. Is it oil running onto the hot exhaust? If so, exactly where is it originating? Once we know just where the smoking is starting, we can address what to do. There isn't much that we can think of in performing the PCV replacement that would be a potential problem to cause the smoking.
We are now ready to remove the bolts *audible sigh*
you can doit in 10 minutes with a scruedrive there is a video of how to doit but the dealer want to maket look hard
Some wise man once said, "All engines and marques have their issues". A Friend just bought a high mileage 750li. This is just poor, unproven engineering. I wouldn't touch one of these with a 3.048 metre pole. Give me a 327cu-in in a Chevy II with a borg warner T10 super - and a PCV that I can pull off with no tools, then soak in some kerosene and reinstall. Jeepers Crow! Gluttons for punishment. I will say that Bavarian Autosport and the excellent videos are a godsend to the Bayer Motoren Werke devotees - Sandy
Ok😊🥰
Changed mine and didn't cure the problem :/ I'll just have to deal with it until I can afford to have BMW do their thing.
What thing does the BMW dealer say they are going to do?
I haven't gone to them. I'm just debating on dropping it off there.
But first I'm going to be doing the throttle body and intake gaskets. I'm almost positive that's where my problem is.
Vince Hodge
What are your symptoms?
I had a puff of smoke on start up but that's gone. I still have suction in the dipstick. It idles extremely rough until its warm. And once its warm, I get a random misfire code under load at low rpms.
Vince Hodge
- Make sure you have all of the hose and pipe connections proper. Are you certain that the pipe that runs through the inside of the intake manifold did not become dislodged during the replacement?
A truly miserable job. First of all you are working blindly. The worst part is that the TORX screws were overtightened from the factory. They will strip, at least half of them will. The other problem is getting your hand back there. I quit. I will get it towed to my INDY. I HATE TORX BOLTS AND E BOLTS. I just recently did the driveshaft bearing, flex disc, trans mount, radiator and trans service. If I didn't put all that work and money into the car I would have junked it. 1997 E 38 with 225000 miles. I recommend replacing the torx bolts with hex bolts and putting a little MMO on the threads.
I have 1995 BMW 740il i completed this with that exact PCV. when i pulled the old one off and it looked the same except it doesn't have the middle black nipple. instead the old one is smooth. when i put the new one on and put everything back i heard loud hissing and then the car stalls. could that center nipple be the reason for the hissing?
there are two types one for the m60 and one for the m62 . the m60 has a plate ate the back . the m62 has a hole for the internal tube to connect to
I tried and the tube came out, do I really have to take the cover out to put the tube back?
Is this the same on a 2003 e65 745i?
Joshua Gerena no