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Sounds like you have a problem with the cooling system. First thing you need to check first if the auxillary fans are working from the time you are the engine is overheating. If the auxillary fans is not working then the problem would be the aux fan itself or relays. if Fan is working then you might have a poblem with the water pump.
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Rev the engine up to 1500 rpm. if you will get heat then there might be a problem with the new water pump. Check also the thermostat. It might be stucked in open position.
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If its cooling down at idle than I would bet the cooling fans are turning on.
I'm betting there is still air in the system from the replacement of the water pump. With the engine cold, turn on your heater to full hot and the lowest fan speed, remove the radiator cap. Top off the coolant if necessary. Start the engine, let it idle through its full warm up. Keep an eye on the coolant level and top off as necessary. Once you hear the cooling fans come on replace the radiator cap and make sure the reservoir is full.
If your not feeling any heat from the heater during this process raise the idle a thousand rpm or so for a couple of seconds and then let the engine return to idle. Repeat this until you feel heat from the vents.
Take it for a drive and let us know how it went.
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
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I will check the fan, but why is'nt there ant heat coming from the heater when I turn it on. lso I just spent $1000.00 for timing chain and new water pump
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