I've had this turbo on the full-race stage 1 GT kit on the car for approx 5,000 miles now. I was driving it the other day and the turbo started to act weird, almost like a silicon tube popped off or something. I limped it home about a mile and looked for problems. Well after finding no couplers loose, I removed the air filter. When I tried to spin the turbo it was not spinning as easy as it used to. Not completely seized, but definitely something wrong. I had good oil pressure, and never had signs of any problems before. If you guys could maybe recommend some things to look at before I install my new turbo. Thanks for any help


Modified by dkboyny11 at 9:42 AM 2/25/2007

 

Do you have your coolant lines hooked up to the turbo?If so what are your sources?

 

where is the feed for the turbo taken from?

did u run a restrictor?

pics of drain.

 

My oil feed was taken from the brace tee fitting that full-race supplied to be located where the stock oil light sensor was. I originally wasn't sent the restrictor in the beginning and had to send the turbo back to garret because I thought it was leaking through the seals or something. I think was was due to no restrictor. They rebuilt it anyway and sent it back to me. I ran it with a restrictor the second time with no problems. I could always hear the turbo spin forever after shutting the car off. The drain is the one supplied with the full race kit run to a Z10 oil pan. No kinks or anything smooth transitions. Also, I first has a #4 AN oilfeed line, but used a #3 oil feed line with the restrictor after the first problem.

 

Contact a Garrett distributor, and ask them about they're CHRA replacement program. I just heard about this the other day from Garrett's news letter. If they will replace the CHRA or give credit for a new turbo unless they find a reason that the turbo was improperlly used or taken care of.

 

I just found the source to the failure. I had a very tinny piece of silicone stuck in the oil feed line restrictor. Was I supposed to run a filter along the oil feed line???? Has anyone else experienced this before. Man realy sucks that a little piece of silicone F'd my $1000 turbo up. I don't even know if they will be able to fix any part of this thing. I could see broken pieces inside the oil housing on the return side. Mother F'er

 

I've had that exact problem before, a piece if excess grey silicone from the engine assembly got in there and it destroyed a $1000 ball-bearing turbo. With the tiny little restrictors that the BB turbos like, any little thing will clog it. Since then I used a -4AN line with a ATP restrictor fitting on the turbo and a wire-basket style strainer filter inline. NOS makes a nice aluminum one that fits inline with a -4AN oil feed line. Since then I've had no problems.

 

Thanks for sharing, that certainly gives me food for thought. Not exactly a scenario that I had considered, but another case of benefitting from others misfortune. None of us are as smart as all of us!

 

On my oil distribution manifolds, I always put a little screen in front of the outlet for the turbo. It goes from 1/4" NPT into a 1/4-1/8" bushing, to the 1/8"-to-AN fitting that I make into a restrictor; the screen is wedged in right before that first bushing, pushed in from the other side of the manifold.

 

Thanks for the info. I have a GT28RS dual-ball bearing turbo as well. I had a little grey piece of silicone stuck in my .035" restrictor also. Man what a shitty thing to happen. I guess it's just our luck

 

Also, a great idea. Thanks for the input, but I think I would feel better with some sort of in-line filter.

 

Can you show me the exact filter from NOS that you are using on the oil feed line. The only one that I found was a high pressure Nitrous filter(aluminum). Thanks

 

That's the one, it has a screen basket filter inside of it, works great as an oil filter for my turbo oil feed. The -4AN filter screws right in to a -4AN oil feed line, and it's easy to open and check the strainer. Here's a pic of it on my motor:

 

I just bought this one:

There's a 10 micron stainless screen inside and -4an ends. It's overpriced, but a nice piece.

 

thanks again, I just placed my order for the same filter.

 

does the oil sandwich plate get filter oil to the turbo???

 

the golden eagle one does.

 

Unfortunately, the oil isn't always filtered no matter where the source is. If the oil filter is operating in bypass, then your turbo is getting unfiltered oil.