sc0tty8 wrote:
Your local parts store should have metric bolts if you don't want it to seperate again
Or maybe do it "right" and use studs. Make the threads of the stud take the load of the header not the threads in the head. Just a thought.
If your looking for a somewhat local shop that can rebuild/repair your turbo check out
http://www.midwestturbo.com.
Even with an exhaust leak you should have made some boost. Off hand I'd say your problem is not solved yet. I'd look more towards the WG being stuck open (I assume there is one?).
Do you have an A/F gauge?
Was it reading lean?
Where you getting "backfiring"?
I'll have to find a picture of your oiling system, I don't get it. But if I understand it right, your bearing/s could be "floating" in oil that is well upwards of 250+++. That will kill the oil and bearings pretty quickly.
John
*edit*
Ok your running a GT-28R (as far as I know from the web site listed). I did not see anything that resembled an "oil resivour", so that still confuses me. For those bearing to work properly there has to be oil pressure. On average 20 - 40 psi should be pressant after the oil restrictor.
"Garrett ball bearing turbochargers require less oil than journal bearing turbos. Therefore an oil inlet restrictor is recommended if you have oil pressure over about 60 psig. The oil outlet should be plumbed to the oil pan above the oil level (for wet sump systems). Since the oil drain is gravity fed, it is important that the oil outlet points downward, and that the drain tube does not become horizontal or go uphill at any point." -- From:
http://www.turbobygarrett.com/turbobyga ... ch101.html