Possibly a loose impeller on the water pump?
Steve Jenkins wrote:
> Hiya boys and girls,
>
> I have an intermittent overheating problem. Every now and then, my temp
> goes dead hot, the heater goes dead cold, and the check gauges light
> comes on. When I stomp on the gas, the temp drops back to normal. I
> have replaced the thermostat 4 times, and there are only 30K on the
> tach. The truck is a '99 V6 4x4. I just had it in the shop, and the
> intake gasket was replaced. They never did figure out why it is VERY
> INTERMITTENTLY overheating.
>
> Current Mods: K&N Cold Air Intake
> Hi-Flow Cat
> Gibson Cat-Back
> 180 Thermostat
> Jet Stage 2 Chip
> Slightly Mod'd Throttle Body
>
> Any help is gratefully appreciated.
>
> Steve Jenkins
> '99 V6 4X4
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