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Old Dec 16, 2007 | 05:51 PM
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HENDEL
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From: BAYVILLE
Post heater does feel hot

my 90 ford e-150 van 5.0l 302eng
heater does not feel werm not hot like should the blend door works fine as i can tel
it has new heater core thermostat i think 195 i dont know
whats is the oe type thermostat that came from ford
the hoese have pressure when running what is the operating temperature
for this vehicle
 
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Old Dec 17, 2007 | 07:33 AM
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Check both heater hoses to make certain you have proper coolant flow.

Steve
 
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Old Dec 17, 2007 | 05:13 PM
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Originally Posted by projectSHO89
Check both heater hoses to make certain you have proper coolant flow.

Steve
the heater valve seems to be working can i change
the thermostat to 160 how can you tell if the thermostat is open
 
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Old Dec 17, 2007 | 05:45 PM
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Not for sure, but 195 sounds right - 160 is definitely too cool.

The pressure on the heater hoses will be the same as the rest of the system - 16psi or so - whatever the radiator cap is rated for. It's important to keep the proper cap rating on - this raises the boiling temperature of the coolant.

As ProjectSHO89 suggested - check the heater hoses - both should be hot.

One item of experience from my past is that I bought the cheapest heater core the parts store had. It didn't heat well. Closer inspection (held it up to light) showed that about 1/3 of the fin area was blocked off - not apparent until looking through the fins. Heater wasn't heating well, defrost was a lost cause until I got a good core put in - then all back as it should be.

Your vintage likely still uses a cable to actuate the blend door - do you hear it 'thunk' closed when you move the controls to Hot?

Are you sure you have enough coolant in the system?
 
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