The "pattern" for ANY cylinder head is pretty much the same...start with the bolts in the center of the head and work your way out to both ends.
Torquing the cylinder head on your 5.7L Vortec engine to manufacturer specifications requires the use of a "torque angle" gauge, as well as a traditional torque meter.
The torque specifications are as follows:
> Step 1: All bolts: 22 Ft Lbs (30 Nm.)
> Step 2: Short bolts: Additional 55 degrees; Medium bolts: Additional 65 degrees; Long bolts: Additional 75 degrees
Hi Ronnie, Begin the sequence in the middle of the cylinder head and work outwards using a spiral pattern. A good substitute for an angle gauge is to paint a dot of white paint onto each forward facing bolt head and an alignment dot to match each required angle. Regards John
SOURCE: Torque Specs for Head Bolts on 1997 GMC Sierra V8 5.0 Vortec?
.0L Torque Specs Belhousing to engine bolts 28-38 ft/lbs Camshaft sprocket bolt 40-45 ft/lbs Camshaft thrust plate to engine block bolts 108-144 in/lbs Crankshaft pulley to vibration damper bolts 35-50 ft/lbs Cylinder head bolts -1979-1992 --Step 1 55-65 ft/lbs --Step 2 65-72 ft/lbs -1993-up --Step 1 25-35 ft/lbs --Step 2 45-55 ft/lbs --Step 3 75-85 ft/lbs Differential shaft lock bolt 15-30 ft/lbs Driveshaft U-joint to pinion flange bolts 70-95 ft/lbs Exhaust manifold bolts 26-32 ft/lbs Flywheel mounting bolts 75-85 ft/lbs Front engine mount nuts 72-98 ft/lbs Intake manifold to head bolts --Step 1 96 in/lbs --Step 2 16ft/lbs --Step 3 23-25 ft/lbs Intake manifold (upper intake to lower) 12-18 ft/lbs Oil filter insert to engine block adapter bolt 20-30 ft/lbs Oil pan mounting bolts -1979 --Step 1 (Large bolts) 11-13 ft/lbs --Step 1 (Short bolts) 7-9 ft/lbs --Step 2 (Large Bolts) 15-17 ft/lbs --Step 2 (Short Bolts) 10-12 ft/lbs -1980 to 1987 9-11 ft/lbs -1988 to 1993 6-9 ft/lbs -1994-up 110-144 in/lbs Oil pickup tube to main bearing cap nut 22-32 ft/lbs Oil pickup tube to oil pump bolts -1979 to 1987 10-15 ft/lbs -1988-up 12-18 ft/lbs Oil pump mounting bolts 22-32 ft/lbs Pinion bearing preload 8-14 in/lbs Pressure plate to flywheel bolts 12-24 ft/lbs Rocker arm fulcrm bolts 18-25 ft/lbs Spark plugs 7-14 ft/lbs Timing chain cover bolts 12-18 ft/lbs Vibration damper to crackshaft bolt 110-130 ft/lbs Wheel lug nuts 85-105 ft/lbs
SOURCE: head bolt torque settings for a 1998 gmc 1500 5.o
Cylinder Head Torque
1st - step, all bolts; - 22 ft./lbs.
2nd - step, long bolts; - turn 75 degrees
3rd - step, medium bolts; - turn 65 degrees
4th - step, short bolts; - turn 55 degrees
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