DETROIT DIESEL 53
1.7.2
AND BEARINGS
CAMSHAFT
All of the camshaft bearings incorporate small slots
The wo camshafts used in the V-type engines, are
through which lubricating oil is directed to the cam
located just below the top of the cylinder block.
follower rollers.
The camshafts in the V-type engine are positioned
according to engine rotation.
Remove Camshaft
The shafts are supported by bearings (bushing type) that
Whenever an engine is being completely reconditioned
are pressed into bores in the cylinder block.
or the bearings, thrust washers, or the gears need
replacing, remove the shafts from the engine in the
following manner:
The camshafts are supported by two end bearings and
NOTE: Refer to Shop Notes in Section
two intermediate bearings.
1.0 to install a cup plug in the front end
of the camshaft.
1. Drain the engine cooling system.
2. Remove all accessories and assemblies with their
attaching parts as necessary to permit the engine to be
mounted on an overhaul stand.
Procedures for removing accessories and assemblies
from the engine will be found in their respective sections
of this manual.
3. Mount the engine on an overhaul stand. Be sure the
engine is securely mounted on the stand before
releasing the lifting sling.
4. Remove the cylinder head(s). Refer to Section 1.2.
Lubrication is supplied under pressure to the camshaft
end bearings via oil passages branching off from the
main oil gallery direct to the camshaft end bearings.
In addition, oil is forced through an oil passage in each
camshaft which lubricates the camshaft intermediate
bearings.
Fig. 1. - Removing or Installing Nut on
Camshaft or Balance Shaft
1972 General Motors Corp.
February, 1972
SEC. 1.7.2 Page 1
