30 DIESEL ENGINE
REPAIRING RADIATOR LEAKS
Cooling system leaks should be repaired promptly to prevent
equipment damage or possible injury. The use of “stop-leak”
type additives is not recommended.
ANTI-FREEZE
Freezing temperatures can quickly and severely damage the
engine if the cooling system is unprotected. Use antifreeze
when temperatures fall below 32
o
F (0
o
C).
1. Only use permanent anti-freeze in this engine.
2. Completely drain and flush the cooling system with clean
water before adding anti-freeze.
3. Mix the proper amounts of anti-freeze and pure water in
accordance with SAE J1034 and SAE J814C based on the
expected ambient temperature.
4. Mix the anti-freeze and water before pouring it in the cool-
ing system.
CLEANING THE RADIATOR
Clean the cooling system every 500 hours or as needed. Clean-
ing may be required more often in severe service conditions.
Always clean the system when replacing the engine coolant.
(1) Radiator hose
(2) Hose clamp
379O508A
1
2
IMPORTANT
Use water only to clean the radiator core. Never
use tools or any other hard object that will dam-
age fins and tubes. Leaks or degraded perfor-
mance will likely occur.
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