Moparts Tech Archive

Motor General

Engine Factory Torque Specs.

HEMI 426
Fastner Type Torque spec
Main cap bolts----------------------100ft.lbs
Main cap tie bolts------------------45ft.lbs
Connecting rod bolt(7/16in.)--------75ft.lbs
Cylinder head bolts(iron head)------70-75ft.lbs
Cylinder head bolts(aluminum)-------65-70ft.lbs
Camshaft capscrew(street hemi)------40ft.lbs
Camshaft capscrew(race hemi)--------75ft.lbs
Rocker shaft bracket bolts----------30ft.lbs max
Harmonic damper bolt----------------135ft.lbs
Flexplate bolts---------------------70ft.lbs
Torque converter to flexplate bolt--65ft.lbs
flywheel cap screws-----------------70ft.lbs
clutch cover to flywheel bolts------30ft.lbs
--------------------------------------------------
BIG CHRYSLER 383,400,440 B/RB
FASTNER TYPE TORQUE SPECS
Main cap bolts----------------------85ft.lbs
Connecting rod bolts(plain)---------45ft.lbs
Connecting rod bolts(heavy duty)----50-55ft.lbs
Crankshaft rear bearing seal retanier bolts--30ft.
Cylinder head bolts-----------------70ft.lbs*
Rocker shaft bracket bolts----------25ft.lbs
Intake manifold bolts---------------40ft.lbs
Oil pump cover bolt-----------------10ft.lbs
Oil pump attaching bolt-------------35ft.lbs
Oil pan bolts-----------------------15ft.lbs
Cam locking bolt--------------------35ft.lbs
Harmonic damper bolt----------------135ft.lbs
Flywheel/flexplate bolts------------55ft.lbs
Flywheel housing to engine block bolts--50ft.lbs
Flexplate to torque converter bolts---270in.lbs
Water pump bolts--------------------30ft.lbs
Fuel pump bolt----------------------30ft.lbs
Starter mounting bolts--------------50ft.lbs
Exhaust manifold bolts--------------30ft.lbs
--------------------------------------------------
SMALL CHRYSLER 318,340,360 A ENGINE
FASTNER TYPE TORQUE SPEC
Main cap bolts----------------------85ft.lbs
Connecting rod bolts(plain)---------45ft.lbs
Cylinder head bolts,273-318---------85ft.lbs*
Cylinder head bolts,340-360---------95ft.lbs*
Rocker shaft bracket bolts----------17ft.lbs
Intake manifold bolts---------------35ft.lbs
Oil pump cover bolt-----------------95in.lbs
Oil pump attaching bolt-------------35ft.lbs
Oil pan bolts-----------------------15ft.lbs
Cam locking bolts-------------------35ft.lbs
Cam thrust plate bolts--------------210in.lbs
Harmonic damper bolt----------------135ft.lbs
Flywheel/Flexplate bolts------------55ft.lbs
Flywheel housing to engine block----50ft.lbs
Flexplate to torque converter bolts-270in.lbs
Clutch housing bolts----------------30ft.lbs
Front cover bolts-------------------30ft.lbs
Water pump bolts--------------------30ft.lbs
--------------------------------------------------
* indicates to follow factory torque sequence

Thanks quicktree

Tech Index