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SECTION 3 - LUBRICATION AND MAINTENANCE
3-12
EVERY 10 HOURS OR DAILY
If the engine coolant is low, add coolant through
the radiator cap, 1, at the top of the hood.
CAUTION: THE COOLING SYSTEM
OPERATES UNDER PRESSURE WHICH IS
CONTROLLED BY THE RADIATOR CAP. IT IS
DANGEROUS TO REMOVE THE CAP WHILE
THE SYSTEM IS HOT. ALWAYS TURN THE
CAP SLOWLY TO THE FIRST STOP AND
ALLOW THE PRESSURE TO ESCAPE
BEFORE REMOVING THE CAP ENTIRELY.
WEAR GLOVES WHEN REMOVING THE CAP.
The coolant added to the engine must meet
specific requirements. Use a low silicate
antifreeze which meets Engineering Standard
GM 6038-M, or which contains no more than
0.1% anhydrous alkali metasilicate and meets
either Engineering Standard GM 1825-M or GM
1899-M, which are performance specifications.
NOTE: Factory fill is a fully formulated
coolant mixture (pink in colour). Propylene
and ethylene glycol can
be mixed in the
cooling system.
Use soft water in the coolant mixture.
Contaminants in hard water neutralize the
corrosion inhibitor components. Water must not
exceed 300 ppm hardness, or contain more than
100 ppm of either chloride or sulfate.
Figure 3-13
1