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Overheating Issue

janschutz

janschutz

Corn Hauler
I took my wife's Mustang on it's first long trip (140 miles) last night since I need to get miles on it before we take it in the Hot Rod Power Tour. The Temperature gauge stayed at 1/3rd most of the time. I stopped twice on the way and when I would restart the engine, the temperature needle would go almost all the way to Hot, then go back down to 1/3rd when I started to moving again.

Is this cause for alarm? What should I be looking at to correct this?

I also noticed trip odometer is about 5% off. My trip is usually 127 miles and this one was 134 miles door to door. Should I go up one tooth or down one tooth on the speedo gear to correct this.
 
I don't think you have an overheating problem.
When You stop the engine after a long drive , heat builts up in the engine and thats what your temp sender is registrating.When you start your engine and let it sits in idle for awhile , the temp needle will go back to 1/3 of its scale probably.

I think one teeth up.
 
I'd agree, no overheat issue. Unless you see it rise at some time with the engine on, rise after shutdown is normal.
 
Normal hot soak. That coolant inside the block and heads is basically trapped when the water pump is not running. It stays in the block and soaks more heat because its not moving.

I'd be concerned only if it does not start coming down as soon as the pump starts turning, if its in fact hot enough for the tstat to be open.

Sent from my Desire HD using Tapatalk
 
I agree w/ the heat soak. I will GUESS at the speedo gear issue. Do you think the difference in mileage could be from tire size difference from stock- as well as the differing gear teeth? What is the size of the tire? I am just curious?
Todd
 
Thanks y'all!

Went out to the driveway and my tire size is P205 / 70R14. I can post wnat the tire size on my other mustang tomorrow when I get home.
 
The temp after a stop sounds normal. Mine does that, when the water pump starts again with the motor it comes right down.

The odometer being off is due to gearing and your speedometer is probably off as well.

My speedometer was way off after I changed my gears. Putting larger tires on helped as well as installing the driven gear with the most teeth I could find. Mines still about 10 mph fast at 45 mph.

I'm thinking about getting one of the 15% drop ratio adapters. If my math is correct 55 mph x's 15% is about 8 mph. I am about 10 off so that should pretty much cure my issue.

The ratio adapters are about 1/4 the way down this page if nothing else works for you...

http://www.transmissioncenter.org/Ford_ ... _Gears.htm
 
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