DETROIT DIESEL 53
4.4
LUBRICATING OIL COOLER
The oil cooler is mounted on the side of the cylinder
The oil cooler housing on a V-type engine Is attached
block at the lower front corner (Fig. 1).
directly to the cylinder block.
To assure engine lubrication should the oil cooler
Remove Oil Cooler Core
become plugged, a by-pass valve located near the top
of the lower engine front cover by-passes oil from the oil
1.
Drain the cooling system by opening the drain
pump discharge port directly to the oil galleries in the
cock at the bottom of the oil cooler housing.
cylinder block. The by-pass valve opens at 52 psi (6V
engines).
2.
Remove any accessories or other equipment
necessary to provide access to the cooler.
The valve components are the same as and serviced in
the same manner as the oil pressure regulator valve in
3
Loosen and slide the clamps and hose back on
Section 4.1.1.
the water inlet elbow on the cylinder block.
Cooling water circulated through the oil cooler
4.
Loosen and slide the clamps and hose back on
completely surrounds the oil cooler core. Therefore,
the tube leading from the thermostat to the water pump.
whenever an oil cooler is assembled, special care must
be taken to have the proper gaskets in place and the
5.
Remove the bolts and lock washers which
retaining bolts tight to assure good sealing.
attach the water pump to the oil cooler housing.
6.
Matchmark the end of the oil cooler housing,
cooler core with a punch or file so they can be
reinstalled in the same position.
7.
Remove the bolts and lock washers which
attach the oil cooler housing to the cylinder block and
remove the housing and core as an assembly.
Be
careful when withdrawing the assembly not to drop or
damage the cooler core.
Fig. 1. Typical Oil Cooler Mounting (6V-53 Engine
Shown)
Fig. 2. Preparing Oil Cooler Core for Pressure Test
1972 General Motors Corp.
July, 1972
SEC. 4.4 Page 1
