On 6/15/2011 10:36 PM, YES NOPE9 wrote:
> gradually overheats on long drive
> no coolant is missing
> fan belt is quiet ... does not appear to be slipping
> turning on interior heater with fan brings temp down
> ( i have only seen water pumps fail by leaking and screeching )
>
> What might it be ?   How can I test ?
> 99guspuppet
It needs the CORRECT thermostat installed. I have witnessed the=20
situation where a late 1980's Chevrolet overheated with the thermostat=20
removed and worked ok with a new thermostat installed. The mechanic said=20
the water needed to go slower through the radiator. I never understood=20
the situation but it did work...

More personal experience: Burned exhaust valves lead to running richer=20
which then leads to fuel still burning in the exhaust manifold. Just=20
more heat than the system can handle. Check compression...

--=20

*John Ferrell W8CCW*

**//**

"In peace, sons bury their fathers. In war, fathers bury their sons."

- Herodotus, Greek historian, 5th century B.C.**

**

--=20
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