Heater question

[Cheapo]

Anyone know which hose is the return hose coming from the heater? My heater core is plugged and i want to try blowing water into the return hose to break up the blockage, but I have no idea which hose is the return.

[htchbck]

Return hose is the one on the driver's side, at least on the EFI cars. I'd assume the carbies are the same but not positive abbot them. Be careful 'blowing water through' it though, you don't want to hit it with too much pressure it can pop and make a mess inside the car!

[Movin]

Be careful how much pressure you put there!
That is how I have a heater core out of a
chevy Suburban!

[MasterTec]

Also.. is your heater core really plugged or are you just getting cold air out of the vents? On these you can only get heat from the floor or defrost.

[milehighbear]

If you flush your heater core, do it using both inlet and outlet.