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Old 09-27-2022, 11:53 AM   #1
karlbenz
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water pump?

96 model, 5.7. motor comes to temp. hits fan temp. fan comes on. cools down fine. I have no coolant flowing through heater hoses though? any ideas?
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2000 c3500 utility bed 7.4l 5sp manual old body style. Cab and chassis
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Old 09-28-2022, 06:52 AM   #2
special-K
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Re: water pump?

Might not be getting up to temp for thermostat to open yet
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Old 09-28-2022, 08:56 AM   #3
Boog
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Re: water pump?

Could be a plugged heater core also. You can unhook the heater hoses at the firewall and reverse flush the heater core.
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Old 09-28-2022, 12:31 PM   #4
karlbenz
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Re: water pump?

I put a 90 model pump on it and it's working now. It had a 96 on it. has the two outlet/inlet already on it. Must be the way they plumbed them. All good now
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