travail

OK I did a boost leak test. So the intake pipe is NOT hook up to the intake manifold at all right I have it plug off and I have a plug on the inlet on the turbo thats were I am adding air. I tryed to put 23lbs in thats what I running for boost and there is a leak but whats F**K up is there AIR COMING OUT OF THE VALVE COVER were most people put there oil catch can hose at. Any idea on why this is happening.
Here are some pics

BluEVOIX

iTrader: (69)

Possibly the turbo is going bad or not sealed correctly.

Air leaking from turbo compressor to the hotside and following into the exhaust valves. From there its making its way into the cylinders slightly leaking past the pistons and into the crankcase. From the crankcase it will lead up to the valve cover pcv to vent to the atmosphere.

03whitegsr

iTrader: (8)

Air is getting past the compressor seals. Vents into the oil drain tube, and out the valve cover through the drain back passages in the block.

4g63smokinall4s

iTrader: (64)

turbo needs to be rebuilt.. seals are going bad
gl

barneyb

There is a hole there - I can see it.

If you look at you cam specs you may find the cause of the problem. I'm guessing you have an intake valve open.

travail

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Yes all of them have this hole there.

travail

I was thinking that because there is more smoke when I am in boost.
But were is a good place to get a rebuilt kit for a ball bearing 35r turbo.

240Z TwinTurbo

iTrader: (25)

Are the seals in the turbo not dynamic seals? I would expect air to have the ability to move past the seals. If you have minimal shaft play and no thrust play I would not assume the turbo needs to be rebuilt.

luckybull

iTrader: (7)

take the ic pipe off the outlet of the turbo, and plug it, then test again. if no more air escapes, then you just found the turbo to be the issue.

evo_glasses

iTrader: (1)

I agree with 240zTT.... Start small dude... Not to challenge your car skills but how many times have you done an air leak test? I haven't personally but I get the basics.

The air is compressed into the turbo, then intercooler, then to the manifold... for the most part... You aren't really testing your engine, that is what compression tests are for. It is the turbo compressor side that you are worried about right? So you have to make sure intake valves are closed. Exhaust valves shouldn't matter I am thinking... So, if your intake valves are open, on a cold engine, the air will leak pass the intake valves through the piston rings (remember cold engine), to the crakcase, then out that hole...

If I am not right please correct me.. and you might wanna cover up that hole with something... lol...

240Z TwinTurbo

iTrader: (25)

I can tell you on the Garrett Ball bearing turbochargers you can leak past the seals on the compressor side while the turbo is not spinning.

griceiv

iTrader: (2)

First boost leak test? Air always comes out of that hole. It's normal, don't sweat it.

20gmr

iTrader: (7)

wow a lot of ppl didn't look at where he has the upper i/c pipe capped before it goes to the intake manifold. A few ppl got it tho lol

evo_q8

iTrader: (20)

dude! just try changing your PCV valve. I had the same problem and its fixed now.

To check after you change it, pull it out of the valve cover and let it be hooked up to the hose that connects to the intake mani and then try a boost leak test. It shud be fine!

best of luck!

compscibOi

iTrader: (19)

Positive crank ase ventilation (PCV). Imagine that. What is your engine at? Valves open?!