I'm hoping to not have to re-build the turbos. They are brand-new Precisions. It sucks to spend $700+ per turbo and then another $400 each for rebuilding them after only a few times driving them.
The bolts that broke were the backing-plate bolts for the exhaust housings. They hold the housing to the cartridge. There is a little heat shield "cup" behind the wheel that is sealed to the cartridge when the bolts are tightened down. I'm crossing my fingers that replacing these bolts will cure the leaks. The oil actually leaks from the turbo (at rest) from between the "cup" and cartridge. Here's a pic of what I'm talking about.....
See the "cups" behind the wheels? The one on the left is shiny, as the one on the right is sooty. It appears that oil is leaking from between the mating surfaces of these little tin cups and the cartridge. Usually, what keeps these tight together are these (broken) bolts and the housing. The housing presses the cup against the cartridge. Dig?
This is all my theory and I'll let you guys know how it goes. Another reason I'm leaning this way is because they just now started leaking. I'd think that if the drain was bad, it would have leaked immediately.
Either way, I will have the pan off anyway, so I'm putting -12 drains in before replacing it. Just to fix it once and for all. They feed above the oil level, but below the screen and scraper, at about the #2 main.
It'd be nice if some of the turbo gurus on here would chime in. I know you're out there.
