I have a 87 turbo II 105k on the enigne. Still pulls strong, but I'm getting smoke through the exhaust. It only seems to smoke at lower speeds like 35mph and lower. I pulled the spark plugs and there is oil on them. The previous owner thought the t4 turbo had a blown oil seal, when I pulled the turbo and exhaust manifold there doesn't appear to be any wetness, which I would expect to see a little bit. Is it possible that I have a blown oil seal and whent he engine is off oil is draining into the engine. Is this possible? Also is it posisble that one of the oil injectors is leaking? I know there are internal oil orings, but that's the extent of what I know about them. I'm assuming it's possible that I blew an oil seal as well. I'm going to swap the stock turbo and exhaust back on and see if it still has the problem. Any help or ideas to try would be appreciated.

 

i had a simalar prob w/ my 88. i blew the oit seal on the exaust side. in turn it just dumper right into the down pipe and burnt off. only thing is, mine smoked when coming off high rpms. other than that im lost.

 

There are basically three ways oil can smoke out the exhaust...

1) Compressor seal bad - check IC and IC pipes; if there is oil in there, it's obvious.
Turbo needs to be rebuilt.

2) Turbine piston compression ring bad or too much pressure in the "crankcase" - oil leaking past the turbine compression ring; if "PCV" is not vented properly, it'll smoke like a bitch.

3) Internal oil control rings - do the 3k to 4k RPM high idle test; does the exhaust smoke noticably?
Engine needs to be rebuilt.


-Ted

 

It was a bad exhaust seal on the turbo. I put the stock one on and now it's perfect. I'm just really glad it wasn't a internal oil seal.