7mgte turbo trouble

**Crseta** · 06-10-2013, 08:30 PM

Hi , I have just got my 7mgte into my Cressida and got it running, problem is when it's switched off the turbo will spin freely but when it's running its tight and dosent want to spin... Has to be related to oil pressure? Anyone ever heard of this problem? Probably worth mentioning that we have just replaced the compressor wheel and put a rebuild kit through to but like I said it spins ok when it's not running. Cheers

**dnegative** · 06-10-2013, 08:47 PM

When its running it wont spin at idle?
I've never looked at a journal turbo running at idle (well... have but never took any notice) but pumping 60psi and shitloads of oil through the center of it is going to have some effect on how it spins.

**Crseta** · 06-10-2013, 08:57 PM

No it won't spin at idle and is hard to turn with ur fingers when it's idling, havnt tried to rev it yet as the afm not hooked up n I won't rev, have shimmed the oil pump also so was worried I might have to much oil pressure?

**dnegative** · 06-10-2013, 09:08 PM

Nah, oil pressure wont be the issue but its why its not turning.
At a guess, the oil pressure has more force than the exhaust gasses at idle.

I would just run it and see how it goes, I had a quick google and there are a heap of people with the same question.
If it was a ball bearing turbo I would be worried, my GT35 spins if you blow into it lol

**Crseta** · 06-10-2013, 09:27 PM

Lol I'll try and run it tomorrow and see how I go, hope it's nothing to worry about. Thanks for the reply

**Cuzzo** · 07-10-2013, 08:00 AM

Wouldn't be sticking my fingers anywhere near a running turbo

mic* · 09-10-2013, 04:27 PM

If you haven't revved it, how did you discover this "problem"? Have you let the oil get hot?

I kind of agree with Cuzzo. It is not really wise finger territory...

**dumbass** · 10-10-2013, 07:50 AM

U mention that u put a kit thru it
Did u do it or did u get a turbo shop to do it

**lexsmaz** · 10-10-2013, 11:23 AM

I would say you have some major issues there, have you got much end clearance or side clearance at the shaft, I wouldn't be driving it till I did some further research / checking

**Crseta** · 10-10-2013, 01:58 PM

It's all good I hooked up the afm so I can rev it a bit and it spins just fine, my old man put the kit in it and he has built many turbos in his time, it just wasn't spinning at idle and was a little stiff but one it revs it spins ok and is now spinning at idle