20g blown ??? Oil inside compressor ,,, NO SHAFT PLAY AT ALL,,

[BOBS90TURBO]

I need to know if a turbo seals can go bad and have no shaft play at all, feels like new.

It has some oil inside the compressor inlet and on the wheel, Just a tad of oil inside the intercooler pipe, none up by the intake elbow.

Only blows a puff of whte smoke if sitting at idle for a minue or so right when you hit the gas it blows oe quick puff... Headgasket and compression are perfect at 170 psi

Boosts hard and only normal black/little white under heavy boost 20psi..

Is it possible to hae bad seals and no shaft play AT ALL!!!!!!!.

The pic shows no oil, I wasjust showing where the oil is showing up at.

 

[yokotabrat]

According to Forcedperformance, No.

See the last question here.

 

[BOBS90TURBO]

Ok thanks, Its just so strange, I can not figure how the oil is getting inside the turbo compressor inlet.

 

[twicks69]

well, if you are either running a K&N filter that was oiled too much, or running the recirculation tubes from the valve cover into the intake pipe, these will both cause oil residue on the compressor side.

You more than likely have nothing wrong with your turbo.

 

[TSIMonsteR]

I had some oil dripping into mine from an over oiled K&N like suggested above. I think your turbo is fine.

 

[yokotabrat]

It could also be from excessive oil pressure if the balance shafts have been removed and the oil relief valve hasn't been ported enough.

 

[twicks69]

not likely with this person's current scenario, since I do not see that in the user profile for this person's mods.

If Darren (FFWD) made this motor though, he would have more than likely reccomended doing a BSE kit on it.

 

[yokotabrat]

I didn't see it in his mods, however I assumed they might be gone since the motor has been built.

I'm not sure I follow you twicks. Even with a proper BSE kit, the oil pressure could be high as a result of blocking the front oil passage.

 

[twicks69]

I didn't see it in his mods, however I assumed they might be gone since the motor has been built.

I'm not sure I follow you twicks. Even with a proper BSE kit, the oil pressure could be high as a result of blocking the front oil passage.

Just saying, if it was high oil pressure that was a potential failure of the turbo (which in this case, it is not), you would see blowout of the carbon seals at the center cartridge and/or oil seeping out the exhaust side of the turbo if the seals were blown. Oil pressure relief is not an issue in this circumstance.

 

[yokotabrat]

Just to clarify, I'm not suggesting that the turbo has failed. Oil can push past the seals without them necessarily being "blown".

This exact case happened just recently to a friend. 16G turbo; one day he sees some blue smoke, and there was oil pooled in the compressor housing inlet. He pulls the intercooler to find a couple quarts of oil. He suspected high oil pressure, so he ported the oil relief valve further and now no problem for the past 3 months, all without changing the turbo. I've also heard of multiple cases of people burning excessive oil because of a clogged crankcase vent. All these point to oil seeping past the seals.

Just a friendly debate. I'm just trying to see your side and how your discounting oil coming from the center cartridge so adamently. I do agree, I would think it would go out the exhaust as easily as the intake, though.

Also, do mitsubishi turbos have carbon seals? Thanks.

 

[crazy_quick]

if your pcv from the head recurculates back into your intake tube, then that is where the oil is coming from.

 

[twicks69]

I've also heard of multiple cases of people burning excessive oil because of a clogged crankcase vent.

This can also be a potential issue, if his PCV is old/clogged, etc.

Just a friendly debate. I'm just trying to see your side and how your discounting oil coming from the center cartridge so adamently. I do agree, I would think it would go out the exhaust as easily as the intake, though.

No problems, I don't mean to be rude -- as well, I don't mean to discount high oil pressure causing excessive pressure at the oil feed inlet at the turbo, causing oiling issues.

Also, do mitsubishi turbos have carbon seals? Thanks.

I am not sure exactly if they are carbon seals in the mitsu turbos -- I do believe that it has journal bearing seals, shaft seals, and two O-rings. (here's a generic pic for mitsu turbo rebuilds)