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Old 06-13-2017, 11:18 PM   #18
RacingManiac
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So I did an oil change this last week before the weekend's autoX and I think I might have put in a bit too much oil(or if the evac pump method didn't suck enough out). Either way the first session out the car spewed a bunch of smoke after a few run and was running with severely reduced power. Checked the oil level after and it was fine. Pulled a couple of code on the Torque and it was AFR related(makes sense if there are oil in the intake being burned and unaccounted for) Reset the code and ran the afternoon session and it never returned. No code, no smoke.
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Old 06-17-2017, 03:55 AM   #19
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Ran two sessions today. Around 90 degrees out today. Drove an hour on the highway to the track. First session was 25 min qualifying session and then ran a 6 lap 3.5 mile race. On the way home my low oil warning message came on. After checking the oil I am down about a quart. Wish I would have checked it before but I can tell you I've run about 4 other similar sessions and put on 500 miles since last oil change. So I would say that the MK7 does burn oil during hard use, not a lot but it will. So check it often if you are tracking. Will run again today after adding and check.

May add the pan first and see if that helps.

Last edited by edge04; 06-17-2017 at 02:55 PM.
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Old 06-18-2017, 11:21 PM   #20
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^ Do you have any kind of catch can already? I think a new or baffled pan might help if we're seeing any oil starvation issues (like the pickup getting starved), but with this issue of oil actually pooling in the heads then being dumped into the inlet is easiest mitigated with a simple catch can setup that keeps the stock PCV to provide a safe place to dump oil into ...versus the intake.

Then I'd just add some oil after track sessions to bring it back up to full as needed.
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Old 08-26-2017, 04:11 AM   #21
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A week ago I did some lapping day sessions at HPR. Stock PCV plate.
With very firm braking to corner entry, the engine oil would overwhelm the PCV system, enter the combustion chambers, and create a huge cloud of smoke.
I could make this happen at will.
I could also pretty much keep it from happening by not braking quite as firmly; which I had to do because I had only so much extra engine oil on hand.

Installed the VWR Oil Catch system and went back out today.
No matter how firmly I braked, there was no smoke.
Very pleased, to say the least.

For the vast majority of drivers, the stock PCV setup works well.
But if you track the car, and brake as firmly for as short of a period of time as you can before turn-in, the VWR kit sure seems to solve the oil surge/consumption problem.
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Old 08-26-2017, 05:10 AM   #22
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Quote:
Originally Posted by normcaldwell View Post
A week ago I did some lapping day sessions at HPR. Stock PCV plate.
With very firm braking to corner entry, the engine oil would overwhelm the PCV system, enter the combustion chambers, and create a huge cloud of smoke.
I could make this happen at will.
I could also pretty much keep it from happening by not braking quite as firmly; which I had to do because I had only so much extra engine oil on hand.

Installed the VWR Oil Catch system and went back out today.
No matter how firmly I braked, there was no smoke.
Very pleased, to say the least.

For the vast majority of drivers, the stock PCV setup works well.
But if you track the car, and brake as firmly for as short of a period of time as you can before turn-in, the VWR kit sure seems to solve the oil surge/consumption problem.
Thank you for the feedback; glad to hear that it solved your issue.

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Old 08-27-2017, 06:24 AM   #23
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Quote:
Originally Posted by normcaldwell View Post
A week ago I did some lapping day sessions at HPR. Stock PCV plate.
With very firm braking to corner entry, the engine oil would overwhelm the PCV system, enter the combustion chambers, and create a huge cloud of smoke.
I could make this happen at will.
I could also pretty much keep it from happening by not braking quite as firmly; which I had to do because I had only so much extra engine oil on hand.

Installed the VWR Oil Catch system and went back out today.
No matter how firmly I braked, there was no smoke.
Very pleased, to say the least.

For the vast majority of drivers, the stock PCV setup works well.
But if you track the car, and brake as firmly for as short of a period of time as you can before turn-in, the VWR kit sure seems to solve the oil surge/consumption problem.
what are you running for tires?

beers
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Old 08-27-2017, 04:04 PM   #24
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Originally Posted by swoope View Post
what are you running for tires?

beers
Michelin Pilot Sport Cup 2.
235/40/18 on 18x8.5 ET45 wheels.
Stock brakes, Ferodo DS2500 pads front and rear, Motul RBF600 fluid.
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Old 09-07-2017, 11:04 AM   #25
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(Thankfully) never experienced this. I thrash the pants off my car on the track. No puff of smoke or limp mode. But I may not have reached the conditions most talk about. 125deg+ engine temps. Racing in winter I haven't seen over 120C.
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Old 09-14-2017, 05:01 PM   #26
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Originally Posted by tripleS View Post
^ Do you have any kind of catch can already? I think a new or baffled pan might help if we're seeing any oil starvation issues (like the pickup getting starved), but with this issue of oil actually pooling in the heads then being dumped into the inlet is easiest mitigated with a simple catch can setup that keeps the stock PCV to provide a safe place to dump oil into ...versus the intake.

Then I'd just add some oil after track sessions to bring it back up to full as needed.
I've been wondering this as well - the VWR and IE PCV system replacements are nice, but it seems like you can solve this problem with a simple catch. Any excess flood of oil that the PCV can't handle would just get caught by the catch can right? It doesn't seem like the $500-600 is worth it when you might be able to find a simple catch can for $200-300. Plus, you wouldn't have to regularly check and empty the can as often as you would if you replaced the PCV system.

This is just speculation so I could totally be wrong, but I'm just trying to figure out if a PCV replacement is necessary
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Old 09-14-2017, 06:26 PM   #27
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Originally Posted by teemmy View Post
I've been wondering this as well - the VWR and IE PCV system replacements are nice, but it seems like you can solve this problem with a simple catch. Any excess flood of oil that the PCV can't handle would just get caught by the catch can right? It doesn't seem like the $500-600 is worth it when you might be able to find a simple catch can for $200-300. Plus, you wouldn't have to regularly check and empty the can as often as you would if you replaced the PCV system.

This is just speculation so I could totally be wrong, but I'm just trying to figure out if a PCV replacement is necessary
Good question.

When I had the oil/smoke issue a few weeks ago, I had the stock PCV plate. A lot of oil was consumed; and the huge majority of it was through the intake valves into the combustion chambers. There was some oil spray into the turbo inlet, but not all that much. So, a catch can only wouldn't have kept all that oil from being consumed. The VWR plate/cap configuration not only kept the oil from being sent through the intake valves, it also did not send a significant quantity into the catch tank.
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Old 09-14-2017, 10:24 PM   #28
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Originally Posted by normcaldwell View Post
Good question.

When I had the oil/smoke issue a few weeks ago, I had the stock PCV plate. A lot of oil was consumed; and the huge majority of it was through the intake valves into the combustion chambers. There was some oil spray into the turbo inlet, but not all that much. So, a catch can only wouldn't have kept all that oil from being consumed. The VWR plate/cap configuration not only kept the oil from being sent through the intake valves, it also did not send a significant quantity into the catch tank.
Interesting. I have replaced my PCV valve on my Golf R with the latest version part no 06K 103 495 AT. The former one had the number 06K 103 495 AA. I have just tracked the car once after the PCV swap. No big consumption during that visit. It was not a very fast track (no extreme braking) so I really can't tell yet.

My "track friends" says they can't detect any smoke from my car during many different days.

A tread I've posted in the subject:

http://www.golfmk7.com/forums/showthread.php?t=33373

/Peter
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Last edited by TheSwede; 09-14-2017 at 10:37 PM.
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Old 09-14-2017, 11:31 PM   #29
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Thanks for the post. I've been looking at the VWR, IE and CTS. Can someone tell me the difference between these three? https://www.urotuning.com/Mk7-GTi-Ca...its-s/4457.htm


It looks like the VWR one actually has an extra connection for the fluid that gets put into turbo inlet unlike the IE and CTS...
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Old 09-15-2017, 01:47 AM   #30
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Interesting. I have replaced my PCV valve on my Golf R with the latest version part no 06K 103 495 AT. The former one had the number 06K 103 495 AA. I have just tracked the car once after the PCV swap. No big consumption during that visit. It was not a very fast track (no extreme braking) so I really can't tell yet.

My "track friends" says they can't detect any smoke from my car during many different days.

A tread I've posted in the subject:

http://www.golfmk7.com/forums/showthread.php?t=33373

/Peter
My stock plate is part number 06K 103 495 AH. It looks like the current number for the GTI is AP.
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Old 09-15-2017, 02:57 AM   #31
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Thanks for the post. I've been looking at the VWR, IE and CTS. Can someone tell me the difference between these three? https://www.urotuning.com/Mk7-GTi-Ca...its-s/4457.htm

It looks like the VWR one actually has an extra connection for the fluid that gets put into turbo inlet unlike the IE and CTS...

I recommend the VWR. Sent you a PM.
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Old 11-12-2017, 07:59 PM   #32
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Had the same issue with oil consumption on hard braking (Cup2 tires, repeated threshold braking on rally roads).

I noticed that once enough Gs had been reached, the PCV never returned to its normal operation, as though the bypass valve stayed open. The symptom of which was positive crankcase pressure, diagnosed by pulling dipstick at idle: air would push out of the engine instead of being sucked in.

Went through three new PCVs. Each time, once a certain load was placed, the positive crankcase thing was happening.

I've kept the old PCVs and when I make time for it I'll do some dissecting & see what I find.
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Old 11-12-2017, 08:48 PM   #33
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Originally Posted by LeGti View Post
Had the same issue with oil consumption on hard braking (Cup2 tires, repeated threshold braking on rally roads).

I noticed that once enough Gs had been reached, the PCV never returned to its normal operation, as though the bypass valve stayed open. The symptom of which was positive crankcase pressure, diagnosed by pulling dipstick at idle: air would push out of the engine instead of being sucked in.

Went through three new PCVs. Each time, once a certain load was placed, the positive crankcase thing was happening.

I've kept the old PCVs and when I make time for it I'll do some dissecting & see what I find.

Wow, good info, thank you.
Looking forward to what you find during exploratory surgery!
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Old 11-12-2017, 08:54 PM   #34
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Originally Posted by LeGti View Post
Had the same issue with oil consumption on hard braking (Cup2 tires, repeated threshold braking on rally roads).

I noticed that once enough Gs had been reached, the PCV never returned to its normal operation, as though the bypass valve stayed open. The symptom of which was positive crankcase pressure, diagnosed by pulling dipstick at idle: air would push out of the engine instead of being sucked in.

Went through three new PCVs. Each time, once a certain load was placed, the positive crankcase thing was happening.

I've kept the old PCVs and when I make time for it I'll do some dissecting & see what I find.
Thank you for the update; looking forward to what you may discover.

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