Sbc Main Caps Torque Specs

Connecting rod bolts 19 24 ft lbs.

Sbc main caps torque specs.

Front cover bolts 12 15 ft lbs. Rocker arms 17 23 ft lbs. Oil pump bolt 23 28 ft lbs. Intake manifold bolts cast iron heads 30 ft lbs.

7 16 main caps 2 bolt engine oil. 7 16 main caps 2 bolt engine oil. Outer main cap bolts 35 40 ft lbs. 7 16 inner main caps 4 bolt.

Always torque bolts in three equal increments. Sbc crank main caps and rod bolts main bearing caps on 327 engines should be torque in two steps to between 60 and 70 lb ft while 350 engines should be taken to 75. Cam thrust plate bolts 8 10 ft lbs. Size use torque lubricant.

Specifications for the four bolt main are 70 ft lbs for the inner bolts 65 ft lbs for the 7 16 inch outer bolts and 40 ft. Main cap torque specification on the typical chevrolet 350 two bolt main engine is 70 ft lbs. Oil unless noted oil pan to front cover 80 lb. 1 4 20 oil pump cover 80 lb.

Intake manifold bolts 23 25 ft lbs. Flywheel flexplate bolts 75 85 ft lbs. For 289 hp boss 302 cylinder head bolts 65 72 ft lbs. Inner main cap bolt.

Outer main cap bolt. Outer main cap bolt. Verify your engine specs with a service manual for your year and model. 7 16 inner main caps 4 bolt engine oil.

Cam bolts 40 45 ft lbs. Screw in rocker arm studs. Pressure plate bolts 35 ft lbs. These are the caps on the crankshaft.

Jumping even later in the 1960s chevy made major design changes to the block crankshaft and connecting rod areas including a new large journal crank with 2 10 inch rods and 2 45 inch mains compression heights varied and in 1968 chevy started to introduce new bore and stroke combinations like the 307. Rod caps or rod bearing caps should be torqued to 45 lb ft for the 327 engine and 35 for the 350 engine. Fastener type torque spec main cap bolts 60 70 ft lbs.