|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,561
|
The 77S mag case from the factory has steel studs.
The fast expansion of the cylinders has a tenancy to pull the steel stud out of the mag case
The fix in the 80/90s pull the steel out, install inserts and replace studs with dilivar
This requires a complete disassembly because the drilling and tapping produces chips of magnesium everywhere.
Suggest, if there is no known problem, keep driving the car.
The mag case, on rebuild far exceeds the value of the used engine.
I, for years, have suggested to my friends get a 3.0 because build costs are way less on the aluminum cases but broken dilivar are always a possibility and reason to replace with steel studs.
Bruce
|