How to Prevent Truck Engine Failure:

How to Prevent Truck Engine Failure:
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Don't trust the jug, jug being the radiator reservoir jug. I've seen this problem a lot. Your car or truck
seems to be running hot, but you have plenty of coolant in your radiator reservoir jug, so you think it's
fine. But it's not and your engine gets ruined.
This is especially serious on your Isuzu npr, Isuzu nqr, Isuzu ftr and frrs, the UD1200, UD1300, UD1400, b
What happens is, in a vacuum reservoir type system, the engine gets a leak or the hose gets a leak . This
system counts on a vacuum to draw water out, which is fine until you get a hole in the cooling system
somewhere. Then it can't draw water out -- can't pull a vacuum; therefore, your truck runs hot. This
ruins a very expensive motor and causes thousands of dollars in damage within just a few minutes.
The best way to avoid this problem, is to physically lift the cab before you crank in the morning when
the engine has been cool for at least 2-3 hours and physically check the radiator level.
DO NOT OPEN THE RADIATOR UNTIL THE ENGINE HAS AT LEAST SEVERAL HOURS COOLING TIME. Open
the radiator, on a cold engine, very slowly. If you open the radiator on a warm or hot engine, you will
risk getting seriously burned.
Just because the reservoir jug may be full, does NOT mean you have coolant in the radiator. Please
check the coolant in the radiator while the truck is cold.

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