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johnanc
02-20-2006, 12:50
Getting ready to switch long blocks. Does anyone know size and thread pitch so I can have longer bolts ready for engine stand attachment?
More Power
02-20-2006, 23:08
Depends on model year.... GM switched to metric bellhousing bolt threads in the last few years of production. Previous bolt threads were SAE.

Jim
tommac95
02-22-2006, 11:14
i think the threads are same on all bolts. some are studs...mine 10X1.5 ...IIRC.
olddieselboy
03-03-2006, 03:52
My experience with these engines shows that all used 3/8' NC up to '97 for sure. No experience with anything newer. When I hang an engine on my stand I always use the same bolts 3/8"NC X 4". Have never worked on Military so unsure about them. Good luck! Gord
ronniejoe
03-03-2006, 05:50
The newer ones are metric as MP said. Can't remember right off, though, the size...10 mm 1.5 I think.