Burning oil at 10 psi

[spook302]

So here is the deal. i rebuilt the top half of my engine due to timing belt slipping cause of a bad replacment job a shop did before i bought the car. while the motor was apart i looked really good at the pistons and the bores. the pistons were fine and the bores had the factory cross hatch marks still on them with no lip at the top of the bores. i replaced the valve seals on the new head and i prelubbed everything while rebuilding the head. I am getting a little oil burning smoke at full boost. not allot at all. I can only tell cause a buddy told me that was chasing me. it does not burn while cold start warming up. It does not burn while reving in nuetral. only when at full boost. it wont do it at say 7psi i have to be at full boost for it to happen. basically right before i shift 1st, 2nd, and 3rd. Any ideas

 

[DSM1G90]

You're gonna burn some til the rings get's seated if you're seeing the bore's hash marks...and take it easy on it until it get's fully broken in.

 

[spook302]

I never pulled the pistons out of the block. I pulled the head, cleaned the tops of the pistons and spun the crank over a couple times after cleaning. everything looked fine so i didnt change them. Compression is good on the motor as well. Could i have leaking turbo seals maybe? its the stock turbo with about 180,000 on it. I mean the car runs great. i cant smell burning oil. i can barely see it myself while accelrating and looking through my rearview but it is there.

 

[spook302]

So with a little research I think my problem may be in the turbo seals. It only seems to do it at high boost applications

 

[DSM1G90]

Yes, you mentioned that you did top end and quoted that you saw the cylinder score lines that was done with a honing tool. Just saying that the block hasn't been broke in yet if you're still seeing the score lines on the walls and oil is going to go past them score lines.

It also could be the seals in the turbo as well if yu got that many miles on the original turbo.

 

[portnpolish97]

Yes, you mentioned that you did top end and quoted that you saw the cylinder score lines that was done with a honing tool. Just saying that the block hasn't been broke in yet if you're still seeing the score lines on the walls and oil is going to go past them score lines.

It also could be the seals in the turbo as well if yu got that many miles on the original turbo.

I say turbo seals. I have seen engines with 40k on them still have the crosshatching on the cylinder walls.