DETROIT DIESEL 53
1.7.7
ENGINE FRONT COVER (Upper)
The upper engine front cover is mounted against the
4.
Tap the cover and dowel pin assembly away
cylinder block at the upper front end of the engine.
from the cylinder block.
On a 6V engine, the crankcase is ventilated through a
breather tube connected to the cover (Fig. 1). The
5.
Remove the Woodruff keys and oil seal spacers
camshaft oil seals ore pressed into the cover.
from the shafts.
6.
Remove all traces of the old gasket material
Remove Cover
from the cylinder block and cover.
When necessary, the oil seals may be removed without
Inspection
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
Check the oil seals and the spacers for wear or damage.
the casing. Remove the seal by prying against the
Replace them if necessary.
washers with pry bars. Install the new seals with
installer J 9790.
Remove, clean and reinstall the wire mesh pad
(element) in the upper front cover.
If necessary, remove the engine cover as follows:
Remove Oil Seals
1.
Remove the various parts and sub-assemblies
from the engine as outlined in their respective sections
1.
Support the inner face of the cover on wood
of this manual.
blocks at least one inch thick to protect the dowel pins in
the cover.
2.
Remove the pulleys from the front end of the
camshafts Refer to Section 1.7.2.
2.
Drive the oil seals out of the cover.
3.
Remove the upper front cover-to-cylinder block
Install Oil Seals
attaching bolts.
1.
Support the inner face of the cover on wood
blocks.
2.
If the outside diameter of the oil seal is not
precoated with sealant, coat the bore in the cover with
non-hardening sealant.
Fig. 1. - 6V Engine Upper Front Cover
Mounting
1972 General Motors Corp.
August, 1972
SEC. 1.7.8 Page 1
