Quote:
Originally Posted by TJ's GMC
Alot of this stuff doesn't actually HAVE to be torque to spec. Tight will do.
Mains at 130-140 ft pounds. I did 135.
Be sure to torque the two rear main 1/2 inch cap bolts at 55-65. I did 60.
Rods at 55-65 ft pounds. I did 60.
Oil pump I did Tight.
Oil Pan 10-15 I'd say, If you use a good gasket and gasket maker.
Flywheel bolts at 100 ft pounds.
Heads 65-72. I did 70.
The clutch pressure plate bolts I'd say no more than 35 foot pounds as they are small and can snap easily.
Bell housing 50-60. Or Tight with a 1/2 drive ratchet.
Intake 20-25. I didn't calculate.
Valve covers. Snug.
Carb. Snug.
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Go by the GMC manual. It's already in the manual 50 years ago, *somewhat repeated above.
Manual X-6023:
Rod bolts 55-65 *
Head bolts 65-72
Main Brg cap bolts (except 1/2" rear) 130-140* Rear 1/2" bolts 55-65* Flywheel to crank bolts 100-105 Intake manifold bolts 20-25 Exhaust man bolts 15-20 Front cover to block bolts 22-27 Camshaft thrust plate screws 4-5 Fuel pump eccentric bolt 60-70 Oil pump cover screws 10-15 Oil filter by-pass valve plug 35-40 Spark plugs 23-27 Rocker arm shaft bracket bolts 20-25 Damper to crankshaft bolt 135-145 Flywheel housing bolts 50-60
* Oiled with SAE no. 10 engine oil
You are not assembling a motor without a manual are you? If torque values are not given, use an approved torque chart for size and material of fastener, and consider if there is gasket squeeze involved. Creating a reference list on here is not a good idea, as regards to motor assembly torque. It's too risky not to check out official documents. *The book gives oiled thread torque values and dry values. It speaks of %10 reduction for oil vs. dry and other pertinent assembly info. So we have already created misinformation (Ref X-6023). Unless you don't care about accuracy. Also: I don't see "snug" and "tight" in the book for motor work. I don't know what "I didn't calculate" means.