how do you flush heatercore

[yardman]

does anyone know how to flush the heatercore ...thanks

[j cAT]

Originally Posted by yardman

does anyone know how to flush the heatercore ...thanks

remove heater hoses from the engine ..one hose in bucket the other using a water hose spray nozzle shoot water into the other hose, then do reverse.. then if you have air power blow it all out and reverse blow...

use low pressures,when it flows freely you know its good...

for some reason you will get a lot of debris stuck here...

I do this every coolant replacement and the heater performance is super hot...

[yardman]

thanks , ill follow those steps....the mechanic at my work said i have poor heat becuse the top hose is lukewarm and the bottom one is very hot going into the core

[j cAT]

Originally Posted by yardman

thanks , ill follow those steps....the mechanic at my work said i have poor heat becuse the top hose is lukewarm and the bottom one is very hot going into the core

with those hoses not hot that is most likely the problem ...many do not clean out the heater cores when doing the coolant service...where I live you do this because when its 10deg f like this morning you need all the heat you can get..fast...

[at1212b]

Originally Posted by j cAT

remove heater hoses from the engine ..one hose in bucket the other using a water hose spray nozzle shoot water into the other hose, then do reverse.. then if you have air power blow it all out and reverse blow...

use low pressures,when it flows freely you know its good...

for some reason you will get a lot of debris stuck here...

I do this every coolant replacement and the heater performance is super hot...

I had my coolant flushed in the fall without getting it heatercore flushed and it seems now in the bitter cold, I don't even have any hot air blowing at all during when I have it set to heat (or it seems for a few seconds when I change the heating dial but goes back to cold).

Is not flushing the heater the likely cause?

Last year, it never blew really hot, just pretty hot to really warm.

[mike561]

those lines to flush will be connected to the water pump btw

[j cAT]

Originally Posted by at1212b

I had my coolant flushed in the fall without getting it heatercore flushed and it seems now in the bitter cold, I don't even have any hot air blowing at all during when I have it set to heat (or it seems for a few seconds when I change the heating dial but goes back to cold).

Is not flushing the heater the likely cause?

Last year, it never blew really hot, just pretty hot to really warm.

with the method I described earlier you will see if it was plugged and the debris blocking it .. also if it has mineral deposits from tap water that are not removed you will see that the flow is restricted even with flushing..

if this is the case [mineral deposits] then chemicals must be used or replacing the core...

make sure the engine temp is not the problem first..there are a lot of defective new junk thermostats being sold now..

[wafrederick]

Reverse the heater hoses by switching them over and is another way to clean the heater core out.Another trick to new thermostats is to drill a small pinhole in it,a way to get rid of air pockets.