Overheating / No Heat from heater - i give up - any ideas??

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Nov 15, 2005 | 05:42 PM

#26

silver93

Thread Starter

Senior Member

Joined: Mar 2001

Posts: 712

Likes: 0

From: winston-salem, nc

Quote:

Originally Posted by DrunkenBowler

I would also like to know the answer to this. I have the same problem. Although, my radiator gets hot, proving that there is coolant moving through it. However, my heater core is ice cold. Thermostat was changed twice and the water pump was replaced. Could it possibly be that the both thermostats and wate pump are bad?

If the cooling system was blocked, wouldn't one of the lines burst open?

Hold onto the line that goes from the water pump housing to the heater core. Is it hot? Get under the dash on the pax side - check the brass fittings going to the heater core - are they hot?

That'll help you determine if hot fluid is at least getting to the core...

Nov 15, 2005 | 05:59 PM

#27

DrunkenBowler

Rotary Enthusiast

Joined: Mar 2003

Posts: 934

Likes: 1

From: STL Area

Quote:

Originally Posted by silver93

Ok, problem solved.

2 thermostats were bad. One was the original which was working at one point, the other was a new one from NAPA.

Ran it without a thermostat installed, no overheat, and the heater works. Unfortunately, now there is a leak at the brass tube junction for the heater core. ugh.

In the end, my lesson for everyone:

Before going crazy with a problem similar to this - run the system without a thermostat. I could have saved A LOT of time and effort if I had just done this first.

Thanks for everyone's help. If anyone knows an easy way to stop a brass junction from leaking, let me know!

I didn't think you can do that? I'll give it a try.

Nov 15, 2005 | 08:20 PM

#28

Gadd

Warming the planet.

Joined: Dec 2004

Posts: 845

Likes: 2

From: Chico, CA

The lesson is; use the proper parts.. The "napa" thermostat does not have the plunger that blocks the bypass port in the thermohousing. Use the OEM thermostat! Your car will never run properly without the thermostat installed. It will run too cool on the highway and the ECU will run in warmup mode (below 180F) , pushed it will likely overheat.