heating up on freeway, but not around town??

[IMPORTSMOKER]

i know it is hot here in cali..but now my car wants to heat up almost to the top of the temp gauge...but as soon as i get off the freeway...it cools down to just under half way on the gauge....i have a new aluminum rad, hv water pump, 180thermostat, and i just installed a new flexalight dual 12 inch fan...it is a puller....but i have the adjustable switch set to about half way...is it possible that it is coming on while on the freeway and causing a restriction ...also, my lower air dam was remover(for the hell of it) a while ago...could that little plastic air dam the bolts up under the radiator frame be causing this?? i think im going to have to put it back on......any takers....

 

[FrdMustangCpe]

i have no clue why its heating up that much. that little air dam 'sneeze gaurd' actually does a lot. my 69 mustang had the front spoiler and it forced cold air up to the engine.

 

[Look Its Aaron]

You still have those seats for sale ?

 

[65ShelbyClone]

Check your lower radiator hose. Unless the hose is new, the spring inside could have rotted and collapsed or is missing entirely. And yes that airdam is there because its supposed to be. You can even modify one from an older Ranger to serve as an upgrade.

 

[ECU5.0]

yes, that air dam serves a purpose. it causes a low pressure space behind the radiator which causes air to be pulled through the radiator

 

[HISSIN50]

agreed - put the chin spoiler back on. in town your fan is pulling air by itself. not so on the road.

good luck.

 

[408stroker5.0]

The Air Dam is your problem... I'll pretty much guarantee it. A buddy of mine removed his and had the exact same problem...put it back on and his cooling problem was gone. The air dam is there to force air up into and through the rad instead of the air just flowing by underneath the car.

Shon

 

[IMPORTSMOKER]

You still have those seats for sale ?

i sure do...make me a goog offer and there yours!!!!

 

[tmoss]

One other thing to think about - if you have sediment in your two bottom rows and/or deposits on the ends of the tubes that restrict flow, the car will run cool at normal speeds but run progressively hotter at higher speeds.

 

[IMPORTSMOKER]

well thanks guys....i put an air dam back on there that i got from a local mustang junkyard and.....problem solved....runs much cooler on the freeway now

 

[tmoss]

Amazing how critical that little piece of plastic is huh?

 

[Michael Yount]

Easy to understand how the NASCAR teams make a fuss over 1/4" more or less height on their rear spoilers.....