High oil psi and burning oil

[tsi87889095]

So my car has been burning oil and had high oil psi for a while. I got home today and noticed the oil catch can was full so i went to empty it and clean it and there was a milky mixture in the can. So i think oil and antifreeze mixed together. Well my antifreeze looks good and my oil looks good. Neither one is milky. I have noticed that its been pushing antifreeze into the overflow to were the overflow is full and then its low at the thermostat.
This all started last year when i put a 2g head on my 1g. My 1g had 165000 on it when i did the swap and did not burn any oil and ran great. Compression was around 140 to 130 and i have checked it recently and it is the same. The balance shafts are still in the block. The 2g head i did new valve seals arp head studs an oem head gasket and ferrea 1mm over sized valves and hks cams and Farra springs. That's when it started burning oil and antifreeze. I have put a different turbo on and still did the same thing and changed the pcv valve and did the same thing. I think its something in the head either the head has a crack or the some how i installed the head gasket wrong or it did not seal. I dont think the rings are shot because of the compression being pretty decent for the miles and how good the car idles and runs. Its weird that its milky out of the valve cover into the catch can but not in the antifreeze or the oil. I appreciate any help.

 

[ulitka]

Water condensation mixed with oil vapors may produce milky looking mix in you catch can which is normal.
How is your catch can setup? Do you have one or two catch cans? I hope you have your catch can(s) connected to intake pipe and intake manifold and not to the atmosphere.
Do you always see smoke from your tail pipe or under certain condition? What color is the smoke? How much and how often do you have to add coolant and engine oil?

 

[tsi87889095]

I have the pcv valve going to the intake and the other port on the valve cover goes to the can and then a line runs to the intake on the turbo and it has a filter on top of the can. I just didn't think it should be that milky. I add a quart every 3 to 4 days and coolant once a week or so.

 

[ulitka]

The filter on top of the can should be removed and replaced with an air tight cap. With that filter in place under boost you would not be able to evacuate enough of a positive crank pressure. Positive crank pressure causes oil leaks through seals, oil contamination, and other ill affects. If positive crank pressure pushes oil through your turbo seal, you burn oil. Also, if you are using a stock MAF, an unmetered air will pass through that filter and cause A/F ratio issues.

 

[Kickerbeast]

Funny, I was just messing with this today too. My catch can also had a lot of condensation in it. Enough that it froze and plugged up the hose. The pressure pushed oil past the turbo seals and made it smoke REALLY bad. My catch can isn't hooked up up to the intake, only the valve cover. I was thinking about running it back through the intake but I haven't decided yet. Under boost the PCV will close off so everything will be pushed through the same single hose that mine is hooked up with now. Seems like it would work better if I routed the PCV line to the catch can and then used a little larger filter on the can.

What kind of oil pressure are you running? Mine is right at 100psi on a cold start and 50+ from 1500-2000 RPMs and up. It will climb close to 100 if I wind it out. I was thinking the oil pressure was my problem with burning oil too until I checked out the catch can today. If yours was completely full, it likely was building too much crankcase pressure and pushed oil past the seals in the turbo. If you think it's an issue from the head, pull your plugs and see how they look. If they look fine, then the oil is being burnt post turbo. Hope this helps.

 

[tsi87889095]

Well i capped off the catch can. Didn't get a chance to drive it so i will c in the morning when i go to work. I have a stock mas with no wide band. Its on the list of things to purchase. My old plugs that i changed a mouth ago were very corded with oil so i put new ones in. I will check them tomorrow when i get home. I think it was pushing oil past the turbo i just hope since i have drove it this way for a while that i didn't hurt the turbo. I know once a seal leaks it usually doesn't reseal so maybe i will need to rebuild the turbo. Thanks for the info and i will keep you posted with what i find out.

 

[Kickerbeast]

The turbos have a metal seal, so you will probably be fine. Have you checked it recenly for play?

 

[tsi87889095]

The turbo has some shaft play but not a lot. I capped the catch can off and have not seen a difference yet. I'm really noticing smoke when I'm in the boost and on deceleration. I think i fixed the antifreeze problem. The seal on the radiator cap was bad so I'm getting a new one tonight and see if that fixes it. I wounder if the turbo seals are bad and that's the problem. Thanks for the help.

 

[Kickerbeast]

What color is the smoke? You could be just blowing some carbon out of the exhaust or the car may just be on the rich side. If your going to get a wideband soon, I would go ahead and get it first and see how that looks.

 

[tsi87889095]

The color is blue which to me would mean oil. I hope to buy a widw band soon but i dont want to mess up the 02 sensor because I'm burning oil. I'm afraid it will clog up the o2 sensor. I know its a little rich because i can smell it at idle but its definitely oil under boost or deceleration. I'm woundering if the high oil pressure is because of the two oil mods i did to the 2g head. When the car is at operating temp at idle its 22psi and doing 75mph its around 85 to 90psi. One other question whats your boost gauge read at idle for vacuum. Mine is around 9 and i thought that is should be around 15. Just curious. Thanks

 

[Kickerbeast]

Your oil pressure is just barely higher than mine, so I wouldn't worry about that too much. Did you say you are running stock oil lines to the turbo? If so, then It's probably not the oil pressure to the turbo. My car idles at 18 inches of vacuum if I remember right. It could just be oil getting past the rings with that many miles, but it's hard to tell. Did you pull your spark plugs?

 

[tsi87889095]

I have not pulled the plugs i will tomorrow. I had a braided line going from the oil filter housing to the turbo. I had put this on before the head swap and never had a problem but since burning the oil have gone back to the stock line just in case this was my problem. I noticed that right after boost it will smoke and it will smoke if i get right back in the gas after boost. I might rebuild the turbo before i assume its the rings being that it is the cheapest and easy next step.