Tried to modify m PVC system and got white smoke.

[under50k226]

My dipstick started to pop out again, so I went to this thread –

http://www.dsmtuners.com/threads/the-4g63t-pcv-system.366890/

The first time; I just changing the PVC fixed it. This time I was missing 2 or 3 barbs on the dipstick. So, in addition to changing the dipstick; I added a check valve in between the PVC and the IM. Car worked fine. Then I tapped my FP intake to attach my VC breather to. Problems. The car started to push smoke out of the exhaust under load. The turbo seemed to have oil all over it. I started reading on tuners; and concluded that maybe my stock oil return like is backing up for some reason causing this; NOT SURE WHAT ELSE IT COULD BE.

I put my breather hose back to its proper place next to the coolant overflow hose and went to dinner. Car feels the same (thankfully I didn’t brake anything) and no smoke.

What do you folks think?

 

[Boomdeeze]

When you say you put the breather hose back to it's proper place, what do you mean? The breather hose should go to the intake pipe to draw out gases during boost.

Your turbo inlet is covered in oil? You may need to use a catch can to catch those gases before they hit your turbo.

What boost level are you at? If you are popping your dipstick out with the 16g, you have excessive crankcase pressure. Have you done a compression test lately?

 

[under50k226]

When you say you put the breather hose back to it's proper place, what do you mean? The breather hose should go to the intake pipe to draw out gases during boost.

Your turbo inlet is covered in oil? You may need to use a catch can to catch those gases before they hit your turbo.

What boost level are you at? If you are popping your dipstick out with the 16g, you have excessive crankcase pressure. Have you done a compression test lately?

Thanks for getting back to me.

My valve cover breather hasn't been properly connected for years; as I researched that thread I inferred it should be connected to the intake to relieve as much pressure as possible. So I tapped my intake tube and connected it. When it is connected; the car smokes from the exhaust and there is a bit of oil on the intake tube near where it connects to the turbo and around the center of the turbo; it looked bad like the turbo was leaking, very scary to me.

So i wanted to see if i broke it finally; so I took it off and let it dangle again and there is no smoke, seems to work fine again.

I've not done a compression test it years since I've not gone out and got and air compressor. My car doesn't see over 25 lbs of boost.

I actually got this knock off from amazon with the check valve expedited for free -

https://www.amazon.com/gp /product/B077GVLN21/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1

I decided on that one because it looks like this more well known one inside:

https://www.amazon.com/Mishimoto-MM...rd_wg=rNZtn&psc=1&refRID=49G0JRX68VSK2PBN6ZAA


I figured I could block off 1 of two inlets then install it in between the valve cover and my intake. I thought I'd hook it up like it should be first and it smoked from the tail pipe.

 

[Gandalf]

post a picture of where you hooked it up to. when you say that you hooked it up to the intake, are you referencing the pipe between your maf and turbo inlet... because that is where it needs to be hooked up to; without a check valve. if you are talking about hooking up the intake manifold to the rear of the valve cover, dont. you should block off the intake manifold side of that and route both of the valve cover ports to the pre-turbo intake pipe; or to a catch can. you need to create vacuum inside the crank case.


If you have it hooked up correctly, then the oil is coming from the valve cover... a little oil is normal, that's what catch cans are designed to catch.

 

[under50k226]

post a picture of where you hooked it up to. when you say that you hooked it up to the intake, are you referencing the pipe between your maf and turbo inlet... because that is where it needs to be hooked up to; without a check valve. if you are talking about hooking up the intake manifold to the rear of the valve cover, dont. you should block off the intake manifold side of that and route both of the valve cover ports to the pre-turbo intake pipe; or to a catch can. you need to create vacuum inside the crank case.


If you have it hooked up correctly, then the oil is coming from the valve cover... a little oil is normal, that's what catch cans are designed to catch.

"So, in addition to changing the dipstick; I added a check valve in between the PVC and the IM. Car worked fine. Then I tapped my FP intake to attach my VC breather to."

So yes; the breather is run to the big aluminum tube between my turbo and intake.

I did not put the check valve between the stock breather nipple on the passenger side of my valve cover and 3/8" npt nipple I drilled and tapped into my FP intake; that's for use with a oil catch can.

If the car is hooked up stock, white smoke comes out of the exhaust.

I didn't want to go take a pic so I used an old engine bay pic and MS paint.

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Not sure what else it could be since the oil return is the only stock thing in the set up.

 

[1990TSIAWDTALON]

Snot tube it and see if it smokes. 3/8 line off of the VC dangling down to the under part of the car for a test. You could even run it out the back of the hood to see if it smokes like a freight train under load. That is excessive crankcase pressure you are dealing with.
Do this just as a test, it might be very revealing. Plug the intake hole while doing the test. The oil in the intake tube is a good sign it is seeing lots of pressure under boost in the crankcase.

 

[under50k226]

Snot tube it and see if it smokes. 3/8 line off of the VC dangling down to the under part of the car for a test. You could even run it out the back of the hood to see if it smokes like a freight train under load. That is excessive crankcase pressure you are dealing with.
Do this just as a test, it might be very revealing. Plug the intake hole while doing the test. The oil in the intake tube is a good sign it is seeing lots of pressure under boost in the crankcase.

Thanks for the reply, but I don't understand what you're asking me to do here. The intake hole was plugged right away so I could still drive the car.

 

[1990TSIAWDTALON]

A snot tube is simply an open hose attached to the VC nipple and allowed to breath freely.