DETROIT DIESEL 53
Operating Instructions 13.1
Inspection
While the engine is running at operating temperature,
check for coolant, fuel or lubricating oil leaks. Tighten
the line connections where necessary to stop leaks.
Engine Temperature
Normal engine coolant temperature is 160 F. To 185
F.
Crankcase
If the engine crankcase was refilled, stop the engine
after normal operating temperature has been reached,
allow the oil to drain back into the crankcase and check
the oil level. Add oil, if necessary, to bring it to the
proper level on the dipstick.
Use only the Heavy Duty lubricating oil specified under
Lubricating Oil Specifications.
Cooling System
RUNNING
Remove the radiator tank cap slowly after the engine
Oil Pressure
has reached normal operating temperature and check
the engine coolant level. The coolant level should be
Observe the oil pressure gage immediately after starting
near the top of the opening. If necessary, add clean soft
the engine. If there is no pressure indicated within 10 to
water or a high boiling point type antifreeze.
15 seconds, stop the engine and check the lubricating
oil system. Refer to the Trouble Shooting Charts in
Section 152.
Warm-Up
Run the engine at part throttle and no-load for
approximately five minutes, allowing it to warm-up
before applying a load.
Avoid Unnecessary Engine Idling
During long engine idling periods, the engine coolant
Ambient Temperature
Pressure Gage
temperature will fall below the normal operating range.
Reading
The incomplete combustion of fuel in a cold engine will
cause crankcase dilution, formation of lacquer or
Above 40F.
1500 psi
gummy deposits on the valves, pistons and rings and
40F. to 0F.
2500 psi
rapid accumulation of sludge 'in the engine.
Below 0F.
3300 psi
NOTE: When prolonged engine idling
is
necessary, maintain at least 800 rpm.
1972 General Motors Corp.
July, 1972
SEC. 13.1 Page 3
