1.5 Flywheel Housing
DETROIT DIESEL 53
Fig. 3 - Flywheel Housing Bolt Sizes and
Tightening Sequence (Operation 1).-ln.Line
Engine
It is very important their all old gasket material be
thoroughly removed from the flywheel housing and the
4. Coat the lip of the crankshaft oil seal lightly with
end plate, otherwise run-out of the pilot and face of
engine oil (single-lip seal) or vegetable shortening
the housing may he affected when the housing is
(double-lip seal). Do not scratch or nick the sealing
installed on the engine.
edge of the oil seal.
Remove and discard the crankshaft rear oil seal.
5. Thread two pilot studs J 7540 into the cylinder
Install a new oil seal as outlined in Section 1.3.2.
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
Install Flywheel Housing
size seal) or J 21278 (oversize seal) on the end of the
crankshaft.
1. Lubricate the gear train teeth with clean engine oil.
2. Affix a new flywheel housing gasket to the rear face
6. With the housing suitably supported, position it
of the cylinder block rear end plate.
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
3. If the flywheel housing has an integral cast hub,
proper location, finger tight. Remove the pilot studs.
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 ).
NOTE: If the engine is equipped with a clutch
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