Heater Core Replacement

[Kurt_W]

Hey all,

I have a '91 4runner purchased in the winter of 2005.

Last summer the water pump outlet hose broke off,so I replaced the water pump, timing belt, and eventually the radiator.

There was quite a bit of rust in the system. And there still is, even after several flushings.

I'm still losing coolant and I can't pinpoint the source. No leaks anywhere I can detect.

Yesterday I noticed there was little to no heat. Normally there is the sound of water rushing into the heater core (I think) but now there's no sound. I am thinking the heater core is the source of my problems.

I have the factory manuals and I can't seem to find a section on heater core replacement.

Has anyone here done it? How bad a job is it? Any details?

Thanks in advance.

Kurt

 

[fourwd1]

First make sure the heater valve on the firewall actually opens and closes when yoy move the dash control. Once you are sure it's in the Hot position and the engine is up to temp, feel both heater hoses. Both should be hot. If only the supply hoses is hot and the return is cold, coolant isn't flowing through the core.

I don't know how much dis-assembly is required to get to it on your truck.