Heater CORE Questions
#1
Intermediate
Thread Starter
Heater CORE Questions
Hello all
07 460 here with 130,000 miles
just last March I had new radiator, fluid and thermostat installed
I live in the desert SW USA so had no reason to turn the heat on until now
and now I have no heat at all
my mechanic tried to do a "flush" of the heating core and now I do have
heat but it is intermittent
can someone explain the heating core to me, how is it possible to flush it,
and how does it become plugged if that is a good term to use
possible it needs to be replaced, is this a big job and about how much $
THANK YOU for any comments to educate me
07 460 here with 130,000 miles
just last March I had new radiator, fluid and thermostat installed
I live in the desert SW USA so had no reason to turn the heat on until now
and now I have no heat at all
my mechanic tried to do a "flush" of the heating core and now I do have
heat but it is intermittent
can someone explain the heating core to me, how is it possible to flush it,
and how does it become plugged if that is a good term to use
possible it needs to be replaced, is this a big job and about how much $
THANK YOU for any comments to educate me
#2
Pole Position
I suspect, you have an air pocket in the heater core. It is due to improper air purge. If it is caused by air trapped in the core, drive your car on ramps and stop the engine. Open the coolant overflow tank cap, make sure you have enough coolant in it the tank. Start the engine and let it run, watch for air bubbles in the tank. If see some, there is air in the cooling system.
#3
Lexus Champion
Check the coolant overflow reservoir under the air inlet tube to see if it’s full or not.
Last edited by sdls; 10-23-20 at 07:29 AM.
#4
Lexus Test Driver
iTrader: (1)
Hello all
07 460 here with 130,000 miles
just last March I had new radiator, fluid and thermostat installed
I live in the desert SW USA so had no reason to turn the heat on until now
and now I have no heat at all
my mechanic tried to do a "flush" of the heating core and now I do have
heat but it is intermittent
can someone explain the heating core to me, how is it possible to flush it,
and how does it become plugged if that is a good term to use
possible it needs to be replaced, is this a big job and about how much $
THANK YOU for any comments to educate me
07 460 here with 130,000 miles
just last March I had new radiator, fluid and thermostat installed
I live in the desert SW USA so had no reason to turn the heat on until now
and now I have no heat at all
my mechanic tried to do a "flush" of the heating core and now I do have
heat but it is intermittent
can someone explain the heating core to me, how is it possible to flush it,
and how does it become plugged if that is a good term to use
possible it needs to be replaced, is this a big job and about how much $
THANK YOU for any comments to educate me
Last edited by sha4000; 10-23-20 at 03:03 PM.
#5
A very important point in all this is the cap on the coolant reservoir. The cap is a pressurization cap, much like the old radiator caps and must be properly tightened or pressurization will not be attained and there will be overflow because the boiling point of the coolant will be lower. To properly tighten the cap, you must turn until it clicks, much like the pressurization cap on your fuel tank.
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