Most repair manuals usually call for 25 lbzperiodz/ftzperiodz on aluminum and 45 lbzperiodz/ftzperiodz for iron, but since it's almost impossible to get a torque wrench on the 4 bolts in the center, you'll probably have to use an end wrench and take your best guess at getting them all about the same. Start in the center and work clockwise.
Answer #2For a 96 to 2000 Chevy pickup ( 8th VIN number M ) models were you use the plastic gasket with the rubber seals, you will torque three times in a sequence.
As for the sequence of tightening the bolts. There 8 bolts four in front and four in rear of engine, but you have to look at them as being two rectangular patterns, an inter and an outer.
Rear
5 6
3 2
1 4
7 8
Front
Do this Three times starting with 3 Ft. Lbs. then 8 Ft. Lbs. then finish with 11 Ft. Lbs.
If you do not have a Torque wrench, 11 Ft. Lbs. is not Crank down as tight as you can.
11 Ft. Lbs. is Just pretty snug with lots of room to go still, using a regular 3/8 Drive ratchet. Not a breaker bar for more torque.
35 ft. lbs.
1996 chevy c1500 pick up 305 motor bolt torque spec intake manifold
8ft pounds
89 in. lbs
Intake manifold (Cast Iron) is 30 ft/lbs with non-hardening sealer. Exhaust manifold 25 ft/lbs with anti-seize lubricant. Heads are 65 ft/lbs
35 ft. lbs.
13-16 ft lbs
30-ft. lbs
Intake Manifold (Cast Iron Heads) Non- Hardening Sealer 30 ft-lbs.
With cast iron heads it is 25 ft-lbs.
35 ft. lbs.
Torque for the 300 6 intake and exhaust manifolds is 28 to 32 foot pounds