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clinebarger · 05-27-2015, 10:12 PM

Do Not trust gauges in '03-'06 trucks, They are fail prone, Usually they start buy reading wrong before they go completely bonkers.

Water Pumps are simple devices, They either Leak, Lock-up, Cavitate the housing, Or the Impellers rot off, Did you pop the cover off the back of the pump to verify the pump was actually bad? I assume it wasn't leaking or locked up.

I always make sure to catch all the antifreeze I drain from a vehicle, Then I put it all in leftover empty antifreeze jugs. This allow me to measure the Coolant that came out, So I know if the system is short on coolant (air-lock situation)

Thermostat, I have seen 1 or 2 Thermostats stick closed in my whole career, They almost 100% stick open.

Radiator, A Half to 3/4 clogged radiator core will cause overheating while driving.

05-27-2015, 10:12 PM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 04 6.0 2500 running hot Do Not trust gauges in '03-'06 trucks, They are fail prone, Usually they start buy reading wrong before they go completely bonkers. Water Pumps are simple devices, They either Leak, Lock-up, Cavitate the housing, Or the Impellers rot off, Did you pop the cover off the back of the pump to verify the pump was actually bad? I assume it wasn't leaking or locked up. I always make sure to catch all the antifreeze I drain from a vehicle, Then I put it all in leftover empty antifreeze jugs. This allow me to measure the Coolant that came out, So I know if the system is short on coolant (air-lock situation) Thermostat, I have seen 1 or 2 Thermostats stick closed in my whole career, They almost 100% stick open. Radiator, A Half to 3/4 clogged radiator core will cause overheating while driving.