High Water Temp on stang

str8stang036 · May 15, 2008

I finally have my car running after a long build process. I recently switched the t-stat from a 180* to a 160* hoping this would help the problem. The temp now goes up slowly and continues going to about 210. I shut off the car to be on the safe side. I do have an underdrive pulley on the water pump. I also have aluminum heads with a power adder on the car, I think I remember reading that aluminum heads cause the car to run hotter.

I have also added water wetter to the car to help reduce temp. Would would be another cause or something to look into about this?

Chythar · May 15, 2008

Could be a lot of things. One thing to remember is that more power = more heat. You may never run at stock temps with the new heads, but you should be close. An underdrive pulley on the water pump is definitely an issue, you need water flowing through the system to cool it off. You could also have a blown head gasket. When the car is cool, pop the radiator cap and see if you smell exhaust in the coolant. You can also run the car with the cap off; if you see bubbles, your head gasket has a leak. Your radiator cap could also be bad; if it doesn't hold pressure, the temps will climb faster.

str8stang036 · May 15, 2008

I am pretty sure the head gasket is fine. The motor has less than 5 miles on it. No bubbles in radiator fluid You make a good point on the radiator cap, and the underdrive pulley.

I even thought about my fox body water pump spinning the wrong way. I believe it is reverse pump. That means it spins counterclockwise right?

HISSIN50 · May 15, 2008

If this occurs while at idle, it might be normal if you still have OEM fan switching. The low speed fan doesnt come on naturally till about 208*F.

Otherwise, be sure the radiator is burped.

Here's a little tech note about cooling systems. It might be worth a quick read and run through on the parts that apply to you. There are also hyperlinks for doing manual fan switches and testing the fan circuits if needed.

Good luck.

str8stang036 · May 15, 2008

I have a fan switch. It runs on high whenever I hit the switch. This occurred after a quick drive around the block and about 15min of idle.

HISSIN50 · May 15, 2008

str8stang036 said:
I have a fan switch. It runs on high whenever I hit the switch. This occurred after a quick drive around the block and about 15min of idle.

I'd still double check the function of the fan with the switch turned on.

str8stang036 · May 15, 2008

Although I do notice a big draw in power when I turn the fan on. Don't know what that could be. Thanks for the help guys

Chythar · May 15, 2008

The high speed fan has a high amp draw when it turns on, but the gauge should return to normal in a second or two. If you still have a high draw as long as the fan is on, there's a problem somewhere.

str8stang036 · May 15, 2008

Then I must have a problem some where.LOL!

HISSIN50 · May 15, 2008

An example is a fan motor that's seizing up. It will have a huge draw but not move much air. Or having both fan speeds engaged at once can burn a fan motor up and when both speeds are on simultaneously, the fan speed sucks.

toyman · May 15, 2008

str8stang036 said:
I think I remember reading that aluminum heads cause the car to run hotter.

Can anyone confirm that? I was talking to a performance shop today and they were suggesting that I go with the aluminum heads as they run cooler. Cooler is better with the KB.

Richard

HISSIN50 · May 16, 2008

Alum dissipates heat more efficiently than iron. Iron can end up acting like a bit of a heatsink. How a given set of alum heads will compare to a given set of iron heads with regard to heat retention varies however.

desertcox05 · May 16, 2008

how old is your rad? OEM or alumnium

str8stang036 · May 16, 2008

fluidyne, 2 years old

toyman · May 16, 2008

You made refernce to adding water wetter. I have yet to see a reference to antifreeze. You are running at least a 50/50 mix aren't you?

94GTLaserRC · May 16, 2008

Jose....we need to change that underdrive pulley...The weather is only going to get hotter. We also need to check out that Viper Fan or Spal Twin.

RC

hollywoodstang · May 17, 2008

94GTLaserRC said:
Jose....we need to change that underdrive pulley...The weather is only going to get hotter. We also need to check out that Viper Fan or Spal Twin.

RC

RC is right. i ahve march underdrive pulley and living in california and being 100* outside don't help. stay with stock pulleys if you live in "HOT" weather

94GTLaserRC · May 17, 2008

hollywoodstang said:
RC is right. i ahve march underdrive pulley and living in california and being 100* outside don't help. stay with stock pulleys if you live in "HOT" weather

We talked today, and Jose is going to try to get a Cobra Pulley on his car...That should help a little....but at bare minimum dont have an underdrive...Stock should be the minimum. Without A/C in your car, you should really be able to keep the temp below 200..

RC

toyman · May 17, 2008

94GTLaserRC said:
We talked today, and Jose is going to try to get a Cobra Pulley on his car...That should help a little....but at bare minimum dont have an underdrive...Stock should be the minimum. Without A/C in your car, you should really be able to keep the temp below 200..

RC

Unless you are talking exclusively at idle I'll bet the farm that it won't reduce the temp while going down the highway. IMHO there is something else at play here if the minimum temp is 200+ with a 160 Tstat.

str8stang036 · May 17, 2008

I do have anti-freeze in there with water+water wetter. Like Rob said I am planning to switch do a cobra pulley for added cooling.

This didn't happen during idle only, it happened after a quick drive around the block after idling for about 30 min.

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