1.5 Flywheel Housing
DETROIT DIESEL 53
Fig. 3 -Flywheel Housing Bolt Sizes and Tightening Sequence (Operation 1)--In-Line Engine
It is very important that all old gasket material be thoroughly removed from the flywheel housing arid the end plate,
otherwise run-out of the pilot and face of the housing may be affected when the housing is installed on the engine.
Remove and discard the crankshaft rear oil seal. Install a new oil seal as outlined in Section 1.3.2.
Install Flywheel Housing
Lubricate the gear train teeth with clean engine oil.
Affix a new flywheel housing gasket to the rear face of the cylinder block rear end plate.
3. If the flywheel housing has an integral cast hub, install a flywheel housing-to-end plate shim (.015 " thick). Use
grease to hold the shim to the cylinder block rear end plate (Fig. 2).
4. Coat the lip of the crankshaft oil seal lightly with engine oil (single-lip seal) or vegetable shortening (double-lip seal).
Do not scratch or nick the sealing edge of the oil seal.
5. Thread two pilot studs J 7540 into the cylinder block to guide the housing in place (Fig. 1). On In-line engines, to
pilot the oil seal on the crankshaft successfully, use oil seal expander J 9769 (standard size seal) or J 21278 (oversize
seal) on the end of the crankshaft.
6. With the housing suitably supported, position it over the crankshaft and up against the cylinder block rear end plate
and gasket(s). Remove the oil seal expander.
7. Install all of the flywheel housing bolts, lock washers, flat washers and copper washers in their proper location, finger
tight. Remove the pilot studs.
NOTE: If the engine is equipped with a clutch