1st gen taco luke warm heater

[blakes]

2000 taco with 3.4.

The heater fan works fine, but it blows luke warm air. Was like this before I replaced the heater core. One hose feeding the heater core is hot, the other hose is much cooler.

It's full of coolant.

What would cause this?

 

[Clb]

Blocked up retun?

 

[blakes]

Blocked up retun?

You talking about the hose that goes from the heater core outlet back to the engine?

 

[ThePanzerFuhrer]

Blown head gasket. First thing I check when low heat heater issues start occurring

 

[blakes]

Blown head gasket. First thing I check when low heat heater issues start occurring

It's a 3.4 with 210k miles. Runs like a top with no leaks that I can see and doesn't ever require antifreeze. No smoke.

 

[Clb]

Yes sir
#2 rat nest in htr box

 

[chaplinfj60]

try this guy out, simple way to know for sure,

 

[Stingray]

try this guy out, simple way to know for sure,

Some autoparts rent it, you just have to buy the test fluid.

 

[Stingray]

Is the inlet too hot to touch? like 180 Degs hot?
and does it have a thermostat in it?

 

[blakes]

try this guy out, simple way to know for sure,

Ya.. I probably should test it.

Although my mechanic buddy swears it's the blender door.

Man I don't feel like taking that heater box out again....

For now, I'm just avoiding running the taco when it's cold out. Taking the 322k mile lx470 instead

 

[Halffastford]

blend door stuck open?

 

[blakes]

blend door stuck open?

yes. well sorta.

I removed the cable from the blend door and noticed that the door can close a bit more than the cable allows.

so for now, I'm just leaving it disconnected and enjoying a much warmer heater.

I don't think the HG is going bad, but plan on testing it anyway just to be sure.

 

[Wulf]

OK, Hose is hot on one side, cold on the other....

Have you checked flow? does the heater valve on the firewall open fully?

 

[blakes]

OK, Hose is hot on one side, cold on the other....

Have you checked flow? does the heater valve on the firewall open fully?

My issue was the blend door cable won't let the door close, so I disconnected it.

Good for now.