2007 overheating/heater intermittent problem

mrjimmydale · Nov 30, 2013

I just changed the thermostat.......
start it up blows cold air till the temp goes all the way hot.......then as it starts to blow hot the temp cools to normal.......

heater control valve?

mrjimmydale · Nov 30, 2013

it was doing the same thing before I changed the thermostat........that was the reason that I changed it.....pressure test on the systym passed.....held pressure fine......

05singlecabHEMI · Nov 30, 2013

How many miles on it?
Ever done a coolant flush?

Could look at the heater core.

Does it over heat at highway speeds or all speeds? Does it overheat just from idle?

mrjimmydale · Nov 30, 2013

112,000 miles
overheats at startup........once it opens up a water circulates everything is fine.........
it will peg out the temp until it starts circulating.......is there anything besides the thermostat that would stop flow?

I took the thermostat completely out and letting it cool off.....gonna see what thet does.....

mrjimmydale · Nov 30, 2013

coolant is clean and clear......

05singlecabHEMI · Nov 30, 2013

Could be the water pump or the radiator is plugged up.

2007 overheating/heater intermittent problem

mrjimmydale

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mrjimmydale

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05singlecabHEMI

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mrjimmydale

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mrjimmydale

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05singlecabHEMI

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