Running hot while driving at highway speed - but - "normal" when at idle or
around town seems a bit weird. Better make sure the fluid is topped off.
Recently, in my 76, I experienced the same problem and found that the radiator
was spitting out some coolant (need to get a coolant reservoir)- over a few
weeks I eventually lost enough coolant to make a difference in temp - but only
when highway driving - at idle or around town the temp dropped!!! Funny thing
though - the exact opposite is true with my C Roadster. Highway driving
causes the C to run much cooler than stop-and-go, idle or around town!!
Also check t'stat (or replace), air flow (although you say the airflow is
good) and is the radiator in good shape? Finally, what about the oil?? -
better make sure it is sufficient and fresh!! I agree with Don about
antifreeze to water ratio (I do 40 AF to 60 H2O) and the water wetter.
I'd be interested to understand how you make out. Also, anyone know whether
high RPM (highway speed) driving creates more heat than is offset by increased
air flow?
Dr. Doug
2 Cs that always run hot and 2 Bs that usually run at "N"
-----Original Message-----
From: owner-mgs@autox.team.net On Behalf Of don
Sent: Sunday, April 26, 1998 7:52 PM
To: mgs@autox.team.net
Subject: Re: highway running temp.
Be sure to run as little antifreeze as you can get away with to maximize the
cooling ability of your car. I always ran 50-50 or maybe even more
antifreeze and my MG always ran hot. You can use Redline additive to
compensate for the loss of anti-corrosion from using more water.
At 06:32 PM 4/26/98 -0500, you wrote:
>My 76 B [with belt-driven fan] always runs warmer on the highway. It
>has a 195 t'stat in it right now, and around town, it runs just past the
>"N", touching the top right corner of the N. On the highway though, it
>always rises a bit soon after I get up to about 65 mi/hr in OD, so it's
>revving ~3000rpms and is definitely getting enough airflow.. There it
>runs at maybe just over 5/8 of the guage width. The lower hose has 1000
>mi on it, thermostat has 3000 mi on it, water pump has 4000 mi on it.
>As soon as I come to a stop after a highway run or slow down to 45 mi/hr
>or so, it goes right back to touching the N. Any hints, or is this just
>normal? Thanks,
>
>--
>Tyson Sherman
>http://www.tecinfo.com/~tsherman
>
>
>
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