I am having big turbo problems ever sence i blew a head gasket. i fixed the head gasket and had to put new valves in and while i had the turbo off i put stingers tubbler header on with his new oil lines and 3 inch down pipe. i also bought a garrett t3t4 hubrid turbo and a turbonetics external waste gate. i followed the instruction that came with the turbo like put new oil in and unhook the ciol and turn it over till i get oil pressure and then start it. well it fired right up and sounded fine. after it wormed up i drove around the block and parked it. the next day i drove it to an exhaust shop because all i hade on was a down pipe. on the way home from the exhaust place my turbo started to sound funny like a worn out dremel tool so i poped off the air filter and the shaft was just floppin around and it had ate up the berrings and grinded it self up. i got it towed home and was trying to figure what happend. it had oil and the return wasnt blocked . So i put my stock t3 on there still using all the new parts. i changed my oil agin ant started it up and it must of blew the iol seal out because raw oil was porring out my exhaust like a sive. So now i have killed two turbos in two days and im not shure what i should do before i try a third turbo.
if you have ate up 2 turbo's I.E. the bearings are geting chewed up causeing the shaft to bounce around. your not geting oil or not enough.....i would test O/P at the line with a manual guage.
1: check oil pressure from the pressure sensor outlet. (ie: crank engine w/o ignition coil hooked up) 2: Did you check for shaft play on the turbos you put on. Rebuilt or not those are expensive to replace after they have been used. If its a defect prior its best to remedy that before you install it. 3: If you have oil pressure from the outlet by the oil pressure sensor, check the feed line to the turbo. They do get oil build up inside. I always replace them when I swap a new turbo on, same with the outlet tube. thats pretty much all i can think of. it has to be oil related. cause everything your describing points in that direction. On another note, the way I have my oil pressure guage plumbed to is right off the turbo inlet. that way i know what oil pressure the turbo is getting and use the gauge on the dash for the rest of it. I've chewed two turbos myself (it sucks) and oil pressure was always the problem.
Sounds like the first turbo was from ssautochrome as they are the only ones with instructions like that...they are known to fail in short order. As for the second, do you have the oil return running downhill or flat all the way...no going up hill?
to prime a turbo all you have to do is hook up your return line dump some oil into your feed hole spin the shaft around a little then throw the feed line on and fire it up.
The first turbo i chewed up was new and i primed it just like it said. and my return line is the the one stinger sells for his tube header.
its a possibilty the fed/return line is defective. if i lost a turbo from a oil problem like yours i would have pitched the lines.
If the crankcase is pressurized from blowby , the oil seals could possibly leak by. That happened on my cummins turbo. also check the drain line foe obstructions.
