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Exhaust Manifold Torque Sequence

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Old Sep 21, 2022 | 06:03 PM
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Melonmuziq's Avatar
Melonmuziq
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Exhaust Manifold Torque Sequence

Should be an easy one for someone who has a manual.
Problem is that i am in the middle of moving and cant find mine. Tried to search for it but google is about worthless.
Had to change out a couple expansion plugs behind the motor mount. All back together now except for torquing the manifolds.
1978 F150 351m
 
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Old Sep 21, 2022 | 06:21 PM
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All torque specs for 351M and 400, print this out.Camshaft sprocket bolt--------40-45 ft.lbs.
Camshaft thrust plate bolts---9-12 ft. lbs.
Crankshaft damper bolt--------70-90 ft. lbs.
Crank pulley bolts------------35-50 ft. lbs.
Cylinder head bolts---------step one--75 ft. lbs.
step two--95-105 ft. lbs.
Distributor hold down bolt---20 ft. lbs.
Exhaust manifolds------------18-24 ft. lbs.
Fuel pump to engine----bolt10-15 ft. lbs.
-----nut- 14-20 ft. lbs.
Intake manifold bolts--------3/8 in. bolt--22-32 ft. lbs.
5/16 in. bolt-19-25 ft. lbs.
Main bearing cap bolts--------70-90 ft. lbs.
Oil pan bolts--------------7-9 ft. lbs.
Oil pan plug--------------15-25 ft. lbs.
Oil pump bolts-----------22-32 ft. lbs.
Fan to waterpump bolts---12-18 ft. lbs.
Rocker arm cover bolts-------3-5 ft. lbs.
Rocker arm stud/bolt--------18-25 ft. lbs.
Rod bearing cap nuts--------40-45 ft. lbs.
Spark plugs----------------10-15 ft. lbs.
Starter mounting bolts----15-20 ft. lbs.
Timing cover bolts--------12-18 ft. lbs.
Water pump to engine------12-18 ft. lbs.

While we are on the subject. https://www.projectbronco.com/Techni...the_rumors.htm

And some say grade 5 bolts 19-27ft lbs, grade 8 bolts 28-39 ft lbs

Exhaust and Intake Manifold Bolts

Tighten the bolts on the ends of the exhaust manifold first and work inward. Tighten the exhaust manifold bolts to between 18 and 24 foot-pounds of torque. The intake manifold bolts should be tightened in a crisscross pattern to ensure even gasket sealing. Tighten the intake manifold bolts to between 23 and 25 foot-pounds of torque for all model years except 1975 and 1976. Note that the 351s produced during the 1975 and 1976 model years featured three sizes of intake manifold bolts. Tighten the 5/16-inch bolts to between 21 and 25 foot-pounds of torque. Tighten the 3/8-inch bolts to between 27 and 33 foot-pounds of torque. Tighten the 1/4-inch bolts to between 6 and 9 foot-pounds of torque.

 
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