lummert
Active member
- Joined
- Jan 11, 2008
- Location
- Portland IN
Been having an issue with my 88 765 Turbo wagon. K-Block B230FT (294K miles). 90 manifold with TD04H-13C which appears to be a late model low pressure turbo. I placed thick washer for each bolt between compressor housing and wastegate actuator. It seems that everything is fine until getting into boost while passing slow cars on 55 mph 2 lane highway (going as fast as 85 mph while passing). The next time I park the car I notice oil on the tip of the tail pipe. The engine is old enough to smoke and does it fair share. Most likely the intake valve seals are leaking oil.
Vacuum/pressure test gauge was pegging the needle indicating 7 psi while in boost. The gauge has a stop pin at 7 psi. I removed the thick washers and installed thin washer for each actuator mounting bolt. Test gauge still indicates between 6 and 7 psi while in boost.
My theory is that the high mileage engine running at more than stock boost is causing excessive blow-by while in boost.
Vacuum/pressure test gauge was pegging the needle indicating 7 psi while in boost. The gauge has a stop pin at 7 psi. I removed the thick washers and installed thin washer for each actuator mounting bolt. Test gauge still indicates between 6 and 7 psi while in boost.
My theory is that the high mileage engine running at more than stock boost is causing excessive blow-by while in boost.