Running warm at Hwy Speeds

[Duck]

The 93 is running pretty warm at hwy speeds, around the R, creeping to the O if I run 80 mph for a while.
Idle or in town, right at the M.
It seems that some where I read the if the chin spoiler was missing on Gen 1s, they would run hotter at hwy speeds. Am I dreaming this?
Is it true or BS?
The only other thing I can think of would be the radiator is not flowing well.

 

[chris2523]

first, bleed the coolant system. might be some air in there.

 

[Duck]

Done that, a couple of time to be sure.

 

[chris2523]

hmm. well my next thought is thermostat.
seems weird that a missing chin spoiler would effect it that much, but its possible i guess.

 

[HANG THE EXPENSE]

chin spoiler

I am experimenting with a chin spoiler to grab more air.Its in the pictures of the hood mod.Its hard to see them but they are there.I think they need to be longer and wider but not too much as not to get dragged off by gubmint made roads. I also made an aluminum plate that lives inside the nose on the bottom to spread the load the spoilers take at speed.The look is similar to nascar chin spoilers on 1973 charger drivin by richard petty.Maybe you can find a pic on the web.

 

[unity]

The air damn missing should not cause that much. But also keep in mind that in a Gen one the temp gauge is a real reading and they are not calibrated through the computer like on a Gen II. So a quick cheap test may be to simple replace the single prong temp sensor. There are two, one for gauge and one for the ECU.

And then on the list of things that are not cheap and easy would be the water pump. When they go bad all sorts of weird can happen. Even random temperature spikes, etc. There could be a chance that at higher RPM the blades are not moving right causing issues.

I would do the temp sensor first, then you know you are getting reliable readings. I would then move on to the t-stat as suggested. After that I would look into the water pump.

 

[NoLimit95]

hmm. well my next thought is thermostat.
seems weird that a missing chin spoiler would effect it that much, but its possible i guess.

I'm with Chris on this one.

Had my 94 black on black for 5 years and it never had the spoiler. It ran warm once at HWY speeds and turned out it was air in the system. I burped it a few times and all was good again until I really ran it warm and burned it.

So yes, the chin spoiler missing and causing over heating is BS

 

[fastmark1993]

I say thermostat, I changed mine to a 180 degree one and not once did my car go above the A on highway or city.

 

[thaywood]

I say thermostat, I changed mine to a 180 degree one and not once did my car go above the A on highway or city.

+1 on that!

I went one better and changed the one in my '96 to a 160 degree. Never overheated again.

 

[mikemark8]

get one of these-cheap and it tells you exact engine temps at all times, in real time. Have one in every driver now, and I know for a fact that analogue gauges are wildly inaccurate.

http://www.ultra-gauge.com/ultragauge/index.htm