DETROIT DIESEL 53
1. 7. 8
ENGINE FRONT COVER ( UPPER )
In - Line
The upper engine front cover is mounted against the cylinder block at the upper front end of the engine. The camshaft
and balance shaft oil seals (In-line engine) are pressed into the cover.
Remove Cover
When necessary, the oil seals may be removed without removing the upper front cover. This may be done by drilling
diametrically opposite holes in the seal casing and threading metal screws, backed by flat washers, into the casing.
Remove the seal by prying against the washers with pry bars. Install the new seals with installer J 9790.
If necessary, remove the engine cover as follows:
1. Remove the various parts and sub-assemblies from the engine as outlined in their respective sections of this manual.
2. Remove the pulleys from the front end of the camshaft and balance shaft (In-line engine).
Refer to Section 1.7.2.
3. Remove the upper front cover-to-cylinder block attaching bolts.
Engines
4. Tap the cover and dowel pin assembly away from the cylinder block.
5. Remove the Woodruff keys and oil seal spacers from the shafts.
6. Remove all traces of the old gasket material from the cylinder block and cover.
Inspection
Check the oil seals and the spacers (or wear or damage. Replace them if necessary.
Remove Oil Seals
1. Support the inner face of the cover on wood blocks at least one inch thick to protect the dowel pins in the cover.
2. Drive the oil seals out of the cover.
Install Oil Seals
1. Support the inner face of the cover on wood blocks.
2. If the outside diameter of the oil seal is not pre- coated with sealant, coat the bore in the cover with non-hardening
sealant.
Fig. 2 - In-Line Engine Upper Front Cover
November, 1973
SEC 1.7.8
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