What are the bolt tightening sequence and torque for a 1995 GMC Sonoma pick up truck?

Answer 1

I RECENTLY AND PUT IN A 1995 4.3 Litre 262 C.I. MOTOR IN MY 1985 TRUCK, USED HEADS INTAKE AND EXHAUST OFF the 1985 MOTOR...BUT IF YOU TRY TO DO THIS PLEASE REMEMBER TO INSTALL AN ELECTRIC FUEL PUMP and fuel regulator if going to newer style motor.....

torque specs for 1985 Chevy 4.3 Litre V-6 which basically is the same motor until 1995 other than a valast shaft, and roller lifters in the newer one i put in the truck, which was throttle body fuel injected, instead of carburated

but the late models are not compatible in some parts:

including the timing chain and gears and the cover for timing chain ,plus there was 4 different flywheel patterns for the 1995 model motor which means there is four different crank shafts for it also: but the 1985 model automatic transmissionbolted right up no problems........ might be a good thought to know too if you get needing one, the automatics bolt up on certain models of the motors at least

and there is a difference between the manual transmission version motor and the automatic on newer models too is my understanding.

1985 model has mechanical lifters and 1995 has roller lifters if you find this when doing a motor changeyou better start looking for a new timing chain cover because the 1995 model has an valnce shaft it the top of it right where the intake bolts in, cant miss seeing it there, that is driven by the timing chain, which changes the shape of the timing chain and gears cover.ok bolt specs were:::::

camshaft sproket bolts.......................20 ft lbs (27) (N.M.)connecting rods............................ .45 ft lbs (61)cylinder heads...............................65 ft lbs (88)exhaust manifold bolts.......................20 ft lbs (27)flywheel to crankshaft.......................60 ft lbs (81)intake manifold bolts........................35 ft lbs (47)main bearing caps............................70 ft lbs (108)oil pump bolt................................65 ft lbs (88)vibration damper bolts.......................60 ft lbs (81)water pump bolts.............................30 ft lbs (41) (N.M.)

sequence should be very similar to Chevy 350 models...

and remember heads and intake manifold should be torqued in a set of 3 groups

for instance cylinder heads to block is 65 foot pounds but should be torqued at 35 50 65 in appropriate sequence.....sorry don't have torque sequence anymore.........