Heating issues

[OUMike]

Hey guys,

 

1994 Rado, 203,000 miles. I live in houston and lately we've been getting a cold spell. My air conditioning will cool into the low 50s easy. However when I went to turn the heater on it wouldn't get any warmer than about 60 degrees.

 

I'm thinking maybe the swtich is going. Anyone else have any ideas?

 

Also...

I have a Magnaflow exhaust setup and I guess its causing some additional vibration through out the the truck.

 

 

That black plastic piece there rattles like crazy when I'm idling at a light. Does anyone have a remedy? I tried superglueing it but the glue didn't really hold very well.

 

Anyone have a part number? I think replacing it might be the easiest thing to do.

[crazymjb]

For the vibration you could try removing it and putting some felt behind it.

 

With that mileage a number of things could be wrong, since you are getting some heat it sounds like the heater core may be gunked up.

 

Mike

[cmoore74]

I had that problem on my last truck, a 2000 S-10. At around 80k miles the fan would blow, but the heat was not hot. Turns out this Dex-Cool crap can clog heater cores. I was lucky catching it early enough as a full chemical flush solved the problem. If it is really bad it might require a heater core replacement.

 

Also it is a well known problem which I imagine is not just with the small trucks:

 

http://www.consumeraffairs.com/automotive/gm_dexcool.html

http://www.automotivehelper.com/topic83185.htm

 

Good luck.

[OUMike]

Thanks guys.

 

We are pretty dedicated Prestone users so its not the dex-cool thing. However when the weather clears up I might try a flush anyhow.

 

I thought about the felt thing...just kinda looks tacky, so I was trying to avoid it.

[crazymjb]

You should be able to get it under there so it wont be seen. You could also try putting on some double stick tape or some velcro(will at least prevent the noise even if it doesnt hold them together)

 

Mike