two issues:

1. I have an AEM oil pressure sensor on a t-fitting right before the oil line goes to my turbo
(refer to pic). I've been running this setup for over a year with no problems. Recently,
however, the oil pressure sensor went bad and leaked open, so I had to replace it. I replaced
it with a new one, and the same thing happened to the new one- as if it can't withstand the pressure.

what can be causing this all of a sudden?



2. I've been getting a little smoke at idle out the back of my exhaust and I heard a subtle
rattling sound from my turbo when it spun (refer to video)- something I havent heard before
in its prior use. I mailed it to precision since its still under warranty, and they said they
examined it and everything was fine. My question is: is this subtle rattling noise normal?
whats causing it? What else could be causing the smoke from the exhaust if there are no other
issues with the engine according to my logs?

http://www.youtube.com/watch?v=UrKM_77M6Ds

do you guys think these two problems are related in the sense of some kind of oil/pressure issue?

 

Are you sure the rattling noise is coming from the turbo and not somewhere else, like a pulley bearing? I had one of my pulleys make a similar noise.

 

no... its is 100% coming from the turbo- i made sure of it. in the video, its not the regular engine tick, but the higher pitched and faster rattling noise thats coming from the turbo

 

Hmmmm.....How old is the turbo? Is it ball bearing or journal?

 

7 months old, barely used. ball bearing...

 

That is weird. I have a journal bearing turbo and it doesn't even make any noise like that. As far as the burning oil issue goes, my car was burning a little oil at idle. I took the PCV valve out and it hasn't since. Maybe you are building up too much crankcase pressure. also are you running an oil restricter going to the turbo?

 

yes i am running an oil restricter to the turbo, but there was a recent time where I temporary wasn't

I cant imagine it being crankcase pressure because i have an oil catch can can with two drilled-in -10an lines (no pcv valve)

 

Not a good spot for the sensor. It is right next to the turbine and directly over the CHRA. Would get very hot.

 

But I never had a problem with it until now (twice back to back). Either way I'm going to move it because of what you said.

Do you guys have any pics of how you have yours set up so I can get some ideas?

the exhaust manifold from this Mase kit is blocking any space to run a t fitting after the oil pressure switch. I may have to get an extended line or something...

 

My guess is vibration causing the failure of the sensor. It seems to be hard mounted to something that is exposed to a lot of vibration and my guess is that the motor mounts or something has worn in the last year changing the overall vibration 'signal'. This is now probably hitting the resonance of the oil sensor setup causing the failure.

As for the turbo, check for shaft play. And read this article:
http://www.motoiq.com/magazine_artic...eshooting.aspx