Converting a Z code motor to a W code CPI for a 1995 s-10 2 wheel drive


#1

I need to know how to retofit timing covers to allow for converting a Z code motor to a W code CPI. I am having problems with oil leaking from the timing cover seal surface on the Z code block using a new W code plastic timing cover. Is there any way to find a timing cover that matches the block gasket surface with room for the exciter ring and crank shaft sensor mount in the cover? It is a high performance vortec engine longblock.


#2

solution : sell truck and buy new one.


#3

Even tho the blocks may be the same configuration, the ‘W’ code block may have extra metal flashing cast in at the foundary to accomodate the larger timing cover. I encountered this when doing an engine swap on a Buick LeSabre. The donor block was from a car with a distributor, and the patient had DIS. I swapped over the cam and valve covers, then found out about the extra metal for the larger timing cover when it started leaking oil. I had to fix this with some aluminum plate and JB Weld to modify the timing cover for the missing mating surfaces.


#4

Yup, that or silicone, lots and lots of silicone. Good luck.