91Toyota

I just did my Timing belt/water pump on my 3vze (3.0) and I let it sit for about 20 hours for the permatex RTV to dry and filled it with water first. I filled it from the top hose until it was full then filled the radiator. I used water because I didn't want to waste $20 in antifreeze on the ground if it leaked. Anyway, I am not getting any heat. I thought maybe antifreeze would help so I drained the radiator and used pure 100% antifreeze and I am not getting very little heat. I thought maybe that the RTV stuff fell off and clogged the heater core? I don't know if thats possible but just a thought.

Anyone have any suggestion on why I'm not getting any heat? I did install a new thermostat and gasket and the temp gauge goes to where it should be in the normal amount of time.

Thanks, Trevor

justin_4runner

did u park it on a hill front up and get all the heat out that way? yes the heater core could be plugged best way to see is to flush it back wards using hose to push water threw it backwards is how i did mine and it helped a lot and now working great.

drmix

Does it overheat? This happened to me when I replaced my thermostat. Turns out I had a big air bubble in the system. What you could try is jacking up the front of the car as high as you can then squeezing the lower hose while its running to try and get all the air out. Just a thought

91Toyota

Doesn't overheat. The heater control valve moves freely with the control inside (cold/hot selector) so i know that works. I didn't park it on a hill...i did it on flat ground. I'm hoping its something stupid like that. I'll back flush it first, fill it back up, then we'll see where we're at. Thanks!

Kiroshu

Did you "bleed" the coolant system?

1 Remove Radiator Cap (Make sure coolat lvl is full)

2 Start engine

3Turn heat "on" and to "max heat"

4 Have a bottle Of coolant handly.

5 Better to park on a slight incline but it will work its way out eventually on flat ground.

6 Let truck run

7 Watch for bubbles out of rad fill cap (this is air bleeding out)

As the air is pushed out coolant lvl will decrease and add coolant as necessary.

This may take 5-15 mins.

TNRabbit

DO NOT run 100% coolant for any length of time! You need 50/50 for proper functioning coolant system. Water is the more efficient transfer of heat, & the 50% coolant protects seals & lubricates the pump.

Otherwise, I agree withe previous posts; air bubble in the heater core.

Have you ever used stopleak? It will plug a heater core terribly.

91Toyota

Stop leak belongs in the garbage. I've had my 4runner running with the radiator cap off for about 10 minutes and nothing happened. I'll try to bleed it again and we'll see what happens.

justin_4runner

did u flush the heater core out yet? it sounds like the same as mine did tell i flushed it out due to particals from working on water system over the years.