flushing heater hose with taking it off

[ravivhaik]

i want to flush the heater core, just open the 2 hoses and spray water in high pressure to inlet hose in order to see it out from outlet hose.
i mean from underhood near firewall. just open hoses and spray water in high pressure.

1) is it possible ?
2) big question is - which on is outlet and inlet ?

thanks in advanced
raviv

[azruss]

the cooling system does not take kindly to high pressure. since the gunk settles to the bottom of the radiator, i would flush from the bottom. just leave the top of the radiator open, so it wont develop any pressure.

[81SPIDERMATT]

make sure the heater valve is open ... GENTLY flush with hose ... not high pressure anything ... don't remember which is in and out ... and I pushed both ways a couple of times thinking it would help loosen up sediment ...did mine with no fluid in the system but I bet it would be best to lower the level of antifrezze if you can as you will loose a bit when disconnecting the hoses

[ravivhaik]

worked ! now i have heat ! thanks everyone !