No heat even with new heater core
#1
No heat even with new heater core
i recently installed a new heater core in my 1997 ford f150 new heater hoses
also
flushed radiator coolant was very rusty and nasty
ran for 45 mins with cap off and heat on high
well the heater works fine if your at 3k plus rpms idling or in drive
once below that it blows cold air
so i installed a new thermostat thinking that might be stuck open or something
no better than before
will blow hot if driving hard
has 153k miles btw
the coolant will not boil over unless revved up with cap off
even after 50 miles of driving
is it the water pump?
please help thanks
also
flushed radiator coolant was very rusty and nasty
ran for 45 mins with cap off and heat on high
well the heater works fine if your at 3k plus rpms idling or in drive
once below that it blows cold air
so i installed a new thermostat thinking that might be stuck open or something
no better than before
will blow hot if driving hard
has 153k miles btw
the coolant will not boil over unless revved up with cap off
even after 50 miles of driving
is it the water pump?
please help thanks
#2
by the sounds of the lack of maintanence on the cooling system it is likely your water pump. You need to change out your coolant every 100k because from the heating and cooling it becomes very acidic and will eat away at the impellers on the water pump. It is likely your water pump doesn't have enough of the impellers left in order to push the warm coolant up through the heater core unless revved above 3000rpm
#3
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#8
i have plenty of coolant .alright now mine is doing something different since new heater core water pump and thermostat.
when i first drive it in the morning the temp gauge goes up about a third of the way. warm heat then it drops all the way to cold.
if i stop the top rad hose is about to bust ,so i let the pressure go slowly from the cap on the expansion tank .it bubbles up a few second the temp goes back up and the heat blows hot .i have to do that about three times every morning after that its fine til the next time i drive it.... any body?!?!!?
when i first drive it in the morning the temp gauge goes up about a third of the way. warm heat then it drops all the way to cold.
if i stop the top rad hose is about to bust ,so i let the pressure go slowly from the cap on the expansion tank .it bubbles up a few second the temp goes back up and the heat blows hot .i have to do that about three times every morning after that its fine til the next time i drive it.... any body?!?!!?
#13
#14
Hi everyone, my problems are the same, no heat, one side of the h/c hose hot, the other cool. new t-stat installed correctly, system flushed and good flow though the h/c. Now suspecting the water pump, any other ideas before i spend time/money on the pump?...help! it's cold out here
Thanks
Satman
Thanks
Satman
#15
Water Pump
i recently installed a new heater core in my 1997 ford f150 new heater hoses
also
flushed radiator coolant was very rusty and nasty
ran for 45 mins with cap off and heat on high
well the heater works fine if your at 3k plus rpms idling or in drive
once below that it blows cold air
so i installed a new thermostat thinking that might be stuck open or something
no better than before
will blow hot if driving hard
has 153k miles btw
the coolant will not boil over unless revved up with cap off
even after 50 miles of driving
is it the water pump?
please help thanks
also
flushed radiator coolant was very rusty and nasty
ran for 45 mins with cap off and heat on high
well the heater works fine if your at 3k plus rpms idling or in drive
once below that it blows cold air
so i installed a new thermostat thinking that might be stuck open or something
no better than before
will blow hot if driving hard
has 153k miles btw
the coolant will not boil over unless revved up with cap off
even after 50 miles of driving
is it the water pump?
please help thanks