DETROIT DIESEL 53
4
SECTION 4
LUBRICATION SYSTEM
CONTENTS
Lubrication System ................................................................................................
Lubricating Oil Pump
.......................................................................................
Lubricating Oil Pressure Regulator ........................... ...........................................
Lubricating Oil Filter ...................................................................................... ........
Lubricating Oil Cooler
......................................................................................
Oil Level Dipstick
.......................................................................................... .....
Oil Pan...................................................................................................................
Ventilating System ................................................................................................
Shop Notes - Specifications - Service Tools .........................................................
LUBRICATION SYSTEM
The engine lubrication systems, illustrated in Fig. 1
replaceable element type full flow filter. With this type
include an oil intake screen and tube assembly, an oil
filter, which is installed between the oil pump and the oil
pump, an oil pressure regulator valve, a full flow oil filter
cooler, all of the oil is filtered before entering the engine.
with a by-pass valve, an oil cooler and oil cooler by-pass
Should the filter become plugged, the oil will flow
valve.
through a by-pass valve, which opens at approximately
18-21 psi, directly to the oil coolers.
The rotor type oil pump is bolted to the back of the
engine lower front cover and is driven directly by the
crankshaft.
Lubricating oil from the pump passes from the lower
front engine cover through short gallery passages in the
cylinder block. From the block, the oil flows to the full
flow filter, then through the oil cooler and back into the
If the cooler becomes plugged, the oil flow will be to a
front engine cover and cylinder block oil galleries for
distribution to the various engine bearings. The drain
by-pass valve in the lower engine front cover and then
to the cylinder block oil galleries. The by-pass valve
from the cylinder head and other engine parts leads
back to the oil pan.
opens at approximately 52 psi.
Clean engine oil is assured at all times by the use of a
1972 General Motors Corp.
August, 1972
SEC. 4 Page 1
