1G high oil psi and burning oil

[tsi87889095]

So here is my problem and i have done a lot of research but have some questions and need advice. I have a 90 tsi talon with 168000 miles. Rebuilt the head with a 2g head with new valve guides 1mm over sized ferra valves springs and retainers and hks cams with a 16g and arp head studs and new valve seals and top line revised lifters. Since i did this it burns oil when i rev it up and on deceleration right after getting out of the boost. I did a compression test and its 140 through 130 on all 4 cylinders. Could be better but with the miles i dont think this is to bad. My plugs all have a brown color but they are not wet with oil. So it looks like it is burning the same in every cylinder. It runs great other than the burning oil. My mechanical oil pressure gauge reads 32psi at idle when the motor is at 190 degree's and at 70 mph it reads 100 or so. I have the oil feed line for the turbo going to the oil filter housing. I have even put my 14b on thinking the turbo was burning oil. I read about the trimming the spring in the oil relieve passage in the oil filter housing and porting it out. I think because it has so much psi that it is pushing oil through the seals on the turbo. I'm woundering if the increase in psi is because of the 2g head or the new lifters or the oil feed line for the turbo. I have had this line on for a while before i rebuilt the head and never noticed an increase in psi. I dont think its the rings and i have know boost leaks. Thanks for reading and the advice.

 

[tsi87889095]

Really would like some advice with this guys. Thank you

 

[LiquidX]

Paragraph your posts and don't bump your thread.

I would suspect an oil seal on the turbo first and foremost depending on mileage on them and if the oil pressure is a recent change.

Also is your PCV still working properly and is your breather vent off the valve cover still hooked up to the I take or not?

 

[tsi87889095]

I changed the turbo a couple days ago. When I ran this in the past it never burned oil. The pcv valve is new and goes to a oil catch can. The oil pressure raised after I rebuilt the head. My thought is something raised the oil pressure and is pushing threw the seal on the turbo. What caused the oil pressure to raise. Do you think there is trash in the oil filter housing and its not letting the piston relieve pressure?

 

[LiquidX]

Who did this head work? I k ow that valve guides to to be measured properly for installation for correct height and all.

Have you done a leak down test at all?

 

[tsi87889095]

A machine shop back home did the head work a few years back. They are a very reliable shop that has been in business for a long time. There mostly do V8 but do some 4 cylinders. Next time around i will deal with somebody that knows about are cars. I have not done a leak down test yet. I need to i guess that's the next step but even with that it doesn't explain the high oil pressure. I'm going to pull the oil filter housing off today and clean it and go through it and make sure there is not a lot of trash in there. I will do a leak down test this weekend. Thanks for the advice.

 

[tsi87889095]

I took the oil filter housing apart last night and cleaned it up. I put three washers on the end of the bolt for the pressure relief and put it all back together. Noticed little change in pressure but did fix some oil leaks. Tomorrow i will try and do a leak down test and maybe trim the spring a little. What section of the housing do people port? Thanks for the help.

 

[LiquidX]

http://www.dsmtuners.com/forums/articles-engine-fuel/319342-oil-pressure-relief-valve-porting.html
http://www.dsmtuners.com/forums/newbie-forum/331385-did-i-port-oil-relief-valve-too-much.html
http://www.dsmtuners.com/forums/newbie-forum/297246-porting-oil-housing-relief-valve.html
http://www.dsmtuners.com/forums/newbie-forum/356675-oil-pressure-relief-valve-end-bolt-torque.html

 

[tsi87889095]

I shimmed the bolt for the pressure relief valve the other day and it helped a little. Going down the interstate now at 75mph oil psi is at 80 or so and at idle is at 25. I can tell its a little rich and now the smoke is more white than blue. I was hoping some one can answer why it went from blue to white? I hopefully will do a leak down test but i still have yet to figure out why the oil psi rose so much.