Audi B8 S4 Leaking PCV Diagnosis & Fix
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- Опубліковано 6 вер 2024
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Last time I was out at the dragstrip I saw incredibly high Intake Air Temps and a bunch of coolant was missing from my reservoir. Thank goodness I log my car so frequently that I knew that something was seriously wrong and I needed to stop drag racing. As much as I missed filming some of the repair, I tried my best to catch all of the action for you to see how Kyle from Reiter Performance diagnosed and then fixed the issue at hand.
All hardware installations are performed by Reiter Performance. For more information on their services please reach them at info@reiterperformance.com or check out www.reiterperformance.com for more details
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#AudiB8S4 #PCV #Repair
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Knew from the previous video that the culprit was the PCV.
Had the same exact problem on my A6 with the same motor. My coolant was basically sludge and found just in time to save the motor.
Very common on the 3.0TFSI.
So glad you were able to sort it out!
Keep those videos coming!
so my coolant is leaking in my b8 s4 but I can't see it on the floor or anywhere in the engine bay. I haven't taken the supercharger off. do u think it could just be the pcv water pump and thermostat?
@@vadymgotra1558 did you ever find out what was the problem. Mile you have kinda curious was ot the pvc issues? I do have high mileage B8 and runs like a champ everything still original!
Glad you caught this in time. Looking forward to the next vid. I am surprised that by removing the secondary cooler that it will infact make cooling more effective and give you lower temps. I'm about to get into this myself and now will hold off until you give us your feedback on this.
Audi got rid of the secondary heat exchanger in the 8.5 models. They are a bottleneck in the B8's.
@@VancityAudi Good to know. I will work on removing this also. I've heard of others that have done it but hadn't seen the proof. The fact they aren't on the B8.5 is all the proof I need. Thanks!
Wow. I am very surprised you didn't have more damage from that getting into the oil. Glad your up and running. It will make me pay more attention to my oil changes and temps.
We are very lucky for sure.
Very lucky indeed. My B8.5 threw a rod through the block a little over a month ago. I was stage 1 Integrated Engineering ECU and TCU with their intake. After a month I lost all oil pressure on the highway and the motor went boom. My PCV valve was in the way out so I’m guessing that was the culprit
@@motormouth813 sounds about right. I'm really sorry that you had to go through that.
Kyle seems to be a hero! Thank God for such a good guy, they don’t grow on trees…😉🏁
I'm EXTREMELY lucky to have his support, knowledge and efforts backing me up
@@VancityAudi yes it’s all to have such help if you build cars, I have such a good guy also here in Sweden 😊🙏💙🏁
Great news it wasn't something major! Didn't know the PCV valve was water cooled?
Great video btw. I guess I’m gonna tackle this myself. I’m sure a dealer would charge an arm and leg for this.
Waiting for the upcoming vids 👍
Aah typical issue with those 3.0 chargerd motors!
Good content again Adam!!! 👍💪🔥 Hope it runs like hell now on the track!!
Thanks!
Dealt with this earlier this year. I replaced the PCV and the bricks. You don't actually have to remove both intake manifold flaps if you're only doing the PCV. Really only need to take the RH (passenger side) one off. Glad you got it fixed tho now time to see what it can actually do on the track!
Now you’ve got me worried about my baby’s PCV. I assume this same issue is possible across all of the 3.0 platform vehicles. Thanks for the great video and a heads up I suppose😂
Yes, this is a common problem with the supercharged 3.0L V6 motors found in a few different models in the Audi lineup.
Glad you got it figured out! Sucks that it was the PCV.
Glad you find out on time 😎
Nicely done!
Thanks!
Great work 👍 ready for racing again!
Can a bad pcv valve force air (exhaust) into the coolant?
looking forward to seeing those new IAT's!
They are GLORIOUS!!!
Awww yeah. Totally amazeballs. I have never seen a pcv fail so catastrophically. And I've spent a lot of time reading up on SC core replacements to get ready for this adventure, lol. Well, I'm really glad it was a simple fix and we can see the S4 back on the road. 👍
You and I both.
I’ve been smelling coolant for months now in my 3.0T after it gets warm. Drives me nuts. Coolant never drops so I just live with it. Wish it would just gush out like yours so I could fix and eliminate the smell!
Could be an extremely small, slow leak perhaps?
Wow. So I am experiencing the same thing as a few of these guys said. The smell of coolant on start up as well as driving down the road with the windows down. No leaks or drips whatsoever but my reservoir level keeps dropping it seems like. I don’t have a dipstick though. I did see a video of where the intercooler in the charger was leaking into the valve assembly.
We thought it was the supercharger bricks as stated in the video. Then upon further diagnosis we proved it wasn't.
I had Kyle do the water pump on my b8.5 this week and he also did 3/4 hoses as well. I just wish I would have logged before so I could see if they made much of a difference on the stock HX.
I bet they did. The additional flow I'm sure helps even with the crappy OEM heat exchanger.
I and this happen to my car, except instead of a simple PCV valve it was a cracked oil/coolant passage and long story short, rip car. But its ok because that was years ago and now I have a B9 S5.
You've stepped up to a much better car in my opinion.
Glad it was as simple as a PCV replacement man. I'm sure seeing that water coming out of the bottom of the engine was not a good feeling. Did you scan the car by chance? Did it have a PCV fault code?
Scanning is always the first thing we do. A PCV code was never present.
@@VancityAudi Insane that the PCV can fail that badly and not throw a code.
@@AudiC7Owners scary actually, and proves why so many people have this issue and it causes serious damage to their cars, yet they have no knowledge anything is happening except for seeing coolant missing.
Wait till you go to replace a water pump and find out the fins are gone! Hahah love this engine but I think they coulda did a better job with water pump, Intercoolers and pcv system
Had the mysterious coolant disappearing, with no visible leaks and it was the PCV 🙁 on mine, hence I asked on the previous vid. Glad it’s sorted👍. Mines a 2013, so I take it mine doesn’t have the second exchanger? I need to look
B8.5's removed that secondary heat exchanger. A 2013 is an 8.5.
@@VancityAudi yeah it is the 8.5, thanx fir the feedback, much appreciated 👍
Great video! glad you caught it early!
is there any way to replace with more durable, upgraded parts?
or do we have to replace and then 🤞🏻? what mileage were you at? how often will we need to replace if we are running hard at the track? thank you!
135,000km. From what I know you'd just replace it with another OEM PCV.
@@VancityAudi thanks for the reply.
Audi C7 owners has a video about relocating the PCV valve to the engine bay and using a different, more simple PCV
a year ago. I had the same loss of antifreeze, my car is a 2013 S4. AUDI MEXICO claimed that it was an overheating of the engine, 3 times they removed the engine without evidence of what they alleged. in an audizine forum I saw the same fault and commented that it is the PCV valve. AUDI didn't have any technical bulletin about it and they didn't know what was going on. AUDI GERMANY also did not know what caused the leak. I insisted that the PCV valve be replaced and problems ending a whole year after being in the Audi workshop.
Wow! That is horrible! Dealerships are sometimes the worst place to have problems diagnosed. Sorry to hear that.
Good job 👍
Thanks
Morning. I have a big problem with my VW Golf 5 1.9 TDI 77KW 2008. I have been trying to solve the problem I have with the consumption of both engine oil and antifreeze for several months without success. The fact is that the engine consumes approximately 1 liter of oil per 1000 km, but what is difficult to understand is that the consumption of antifreeze also occurs at the same time, also about 1 liter per month, so the levels of both fluids are constantly decreasing. What is noticeable is that every 10 days of driving, the hose from the uberlauf gets dirty, so that in the area from the PCV valve to the pipe itself, grease accumulates, like chocolate mixed with milk, which for me indicates a mixture of oil and antifreeze. During those ten days, the grease clogs approximately 3/4 of the space in the pipe, however, it is never found in the suction hose itself towards the intake manifold. As for the engine, it has covered 330,000 km, it behaves normally while driving, has good power, there is no significant smoke from the exhaust, the oil in the crankcase is always brown and when I check its level, I never notice any admixtures of water, there are no external leackages on the engine. Therefore what im doubting now is that the problem is actually in PCV valve, that it's only thing that causes creating mixture of oil and water? Sorry for the long text but I would really be extremely grateful for your opinion regarding this problem, any help is welcome and appreciated.
I checked with Reiter Performance and he immediately knew your head gasket is the problem. Good luck!
@@VancityAudi thanks for your quick response and opinion. At first i was immediately suspecting on head gasket, however what i cannot understand in this case is how it's possible to have consumption of 1 liter per 1000km of both oil and coolant. For example, if the coolant mixes with oil in the head gasket, how its possible to have such a significant loss of oil, shouldnt the oil level on dipstick increase in this case, or at least remain about the same? This is the main reason i started to suspect on oil separator/pcv valve, however im not sure is it even possible to have this oil/coolant mixture only due to faulty pcv, does the coolant go through this valve at all?
Wow, that was painful to watch coolant pouring out of the oil pan.
Imagine being the one standing there watching it happen to your own car! Lol
@@VancityAudi Seriously, I feel for you.
can we get my mans to 10k or what
Thanks dude!!! I'm counting down the days as well!
Quick question would the Pcv cause Mis fire and cylinder suppression for Audi s4 2012
If it's leaking badly enough. Possibly.
@@VancityAudi I appreciate the response 🙌🔥
@@VancityAudi cause for me it just one cylinder as well
@iigod_liike1396 a single cylinder is more than likely a spark plug, direct injector, or coil pack.
@@VancityAudi oh okay appreciate the tip🙌
Is testing the pcv valve as simple as having the car idling and opening the oil cap and Seeing if there is any large vacuum pressure making the oil cap hard to remove???
To my understanding there will always be a slight vacuum. I think that would be a great initial test but until you actually pull it off and visually inspect it, you wouldn't know for certain
Hey! I have a 2010 audi A6 with 3.0t and having the same coolant loss issue recently.
Do you have a suggested shop to go to? I'm also in the lower mainland
Thanks!
Email me at adam@vancityaudi.com and we can get you sorted at Reiter Performance.
well shit. my dads 2016 A8L 4.0T has a vacuum leak and the coolant seems to be disappearing… i had a feeling it was the PCV but this confirms it. If only the PCV wasn’t impossible to get to for me 😖
Why is it impossible for you and only you
@@fredfrederickson i don’t have the tools or the skill to access it..?
@@LP620 you can buy tools and learn it’s not that hard of a job to do yourself
Mine just exited via a coolant line all over the floor 😂
Wouldn’t it cool better having two heat exchangers instead of one or having better flow?
I know the e55 amg guys do that by putting a second heat exchanger to help with cooling
I hope u data log plz
Ummmmm, lol. Did you even watch the video? Haha. We have 2 heat exchangers from the factory. I removed 1 for better flow. The smaller heat exchanger is a bottleneck on these models. That's why it was removed from the system the following model year.
Adam, how long did it take for the coolant to drop when you pressurized it? Was it quick? 5 mins? 10 mins?
I've gone from Max to Min over 3k miles. I think mine is the IC cores; but, I might as well go ahead and do a PCV, Tstat, Water Pump, etc while the charger is off.
My guess is your PCV if it is still the OEM part. Mine was so bad after like 5 min of being pressurized you could see the coolant level drastically drop
@@VancityAudi I figured. I saw lots of cracks in yours. Mine is OEM but I'm a 2015 at 72k. Supposedly it's been revised since the B8 models; but, at the end of the day it's still a plastic part underneath the supercharger.
Cool vid bro
Thanks
Pretty sure my PCV is shot too. Go a day or so with not much coolant loss, next day overflow is empty. no visible leaks..
Could also be the supercharger cooling bricks like we thought.
Did you consider the impact of changing your coolant pump, increased pressure pushing oem PCV more...
No, because as I clearly show in the video the seals are completely worn down in certain parts. There is also cracking of the dried plastic. This has nothing to do with increased pressure and everything to do with age, wear and tear.
I do suspect my pcv needs to be replaced as well as the water pump and thermosthat , my car does not appear to have the same issues than yours but I do see some coolant reservoir variances ( sometimetimes is low, sometimes is high) and also there is a rather unusual whine sound coming from the water pump area; not the type of whine I would like to hear.
Just for a frame of reference, could you share how many shop hours would it take to get to the PCV?
Cheers
That sounds like you got air in your system or a crack that is allowing air in. I would first recommend to bleed it.
It would take a couple hours for sure. The stupid PCV is buried.
Yum, forbidden Gatorade!
Tasty, tasty!!!
Would a bad pcv also cause white smoke coming out of exhaust ?
I have the same question?
@@daniel85444 Yes it will I fixed PCV and it took off I did have light white smoke that looked more like vapor....No more problem
@@hurtado98 thank you very much
Running the motor with coolant in your oil has got to be bad on the engine internals. Surprised you don't have further damages.
We got lucky
Ask you mechanic how did he enjoy removing that water pipe that goes over the PVC 😂. It was a PITA for me and a few others I've asked that did this repair before I did it.
He hates working on this car regardless of what he's doing on it, lol
To much flow doesn't give enough time for the coolant to cool in the exchanger / rad , no?
I didn't notice that at all
Will a leaking pcv allow water into the oil?
Watch the video and find out 👍🏻
That rabbit tho!!!!!
What a garbage design, fails and dumps coolant through the engine. Like Chrysler putting the water pump weep hole internal to the pump which would leak inside the engine as well
Did all that and didn’t do the carbon cleaning lol 🤔🤔🤔
We media blasted the valves 5000km ago. I just didn't make a UA-cam video about it. I shared it on social media. They still look mint.
Bet somebody's driveway in Germany is full of coolant from your car right now
no idea what this is supposed to mean, sorry.