Join Date: Dec 2006
Location: Sparta, Missouri
Re: A 1 ton diesel cooling system in a first gen.
It's not the timing, tune, spark plugs, block restriction or water pump. I checked all the usual suspects. When I back flushed the system, I used a flush solvent and didn't stop until the water ran crystal clear. The pump was pumping water like a champ. Something internal with the combination is most likely the culprit. Yes, I agree. What I did was overkill, but now if and when we change the engine combination, (or go to a big block) nothing will have to be done to the cooling system.
Besides, after a couple/few decades of doing this, if a customer brings in his car because it's overheating, the last thing he wants to hear is, "The engine is not put together well. We need to build a new engine that won't overheat." Even though that is most likely the case, it's hard to convince a layman of that. That's a sure way to scare him off and into the hands of another garage that really has no clue what they're doing with a car like this. Been there, done that too many times to mention. Then they bring the car back so I can fix what the other guy did, AND the original problem.
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Speed's expensive, how fast do you want to go?