DETROIT DIESEL 53
Operating Instructions 13.1
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.
Normal engine coolant temperature is 160 F. To 185
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.
Remove the radiator tank cap slowly after the engine
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
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
temperature will fall below the normal operating range.
The incomplete combustion of fuel in a cold engine will
cause crankcase dilution, formation of lacquer or
gummy deposits on the valves, pistons and rings and
40F. to 0F.
rapid accumulation of sludge 'in the engine.
NOTE: When prolonged engine idling
necessary, maintain at least 800 rpm.
1972 General Motors Corp.
SEC. 13.1 Page 3