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10-05-2011, 09:23 PM | #1 |
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Ideal Running Temperature
Hey guys, just wondering what an ideal running temp for my truck should be. I was driving it the other day and sitting at read lights it would creep up to almost 230 F but running it would drop to the low 200s. Is this an okay range?
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1975 Chevy Cheyenne w/ v8 350 and TH350 Siverado interior Fleetside bed aka "The Beast" aka "Cheyerado" |
10-05-2011, 09:24 PM | #2 |
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Re: Ideal Running Temperature
That's definitely hot. Should run about 180. Are you running a thermostat?
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 |
10-05-2011, 09:54 PM | #3 |
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Re: Ideal Running Temperature
For the 80's models, operating temps should be between 190 -220. The factory thermostat should be 190 degrees. This was due to all of the emission crap that are installed on the engines.
Driving my truck around, it normally stays at around 210. I wouldn't worry about temps right at 230; any higher would be a concern though.
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10-05-2011, 10:36 PM | #4 |
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Re: Ideal Running Temperature
I've always had mine run between 160 and 200, just to be safe. 230 while sitting isn't too much of a worry, though
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10-06-2011, 02:17 AM | #5 | |
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Re: Ideal Running Temperature
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1975 Chevy Cheyenne w/ v8 350 and TH350 Siverado interior Fleetside bed aka "The Beast" aka "Cheyerado" |
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10-06-2011, 02:16 AM | #6 | |
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Re: Ideal Running Temperature
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10-06-2011, 05:44 PM | #7 | |
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Re: Ideal Running Temperature
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10-06-2011, 02:14 AM | #8 | |
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Re: Ideal Running Temperature
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10-06-2011, 06:58 PM | #9 |
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Re: Ideal Running Temperature
mine never goes over 160 with a big truck high efficiency radiator. even in florida.
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10-06-2011, 07:41 PM | #10 | |
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Re: Ideal Running Temperature
Quote:
To the OP - make sure you are running a thermostat. Having no thermostat can cause the coolant to pass through the radiator faster than the radiator can cool it. Also make sure your temp gauge is accurate.
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10-06-2011, 08:15 PM | #11 |
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Re: Ideal Running Temperature
Well I just checked it out and I checked my radiator. Guess what I found! Emptiness. Turns out that the coolant was thrown over into the reserve tank.
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1975 Chevy Cheyenne w/ v8 350 and TH350 Siverado interior Fleetside bed aka "The Beast" aka "Cheyerado" |
10-06-2011, 08:43 PM | #12 |
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Re: Ideal Running Temperature
If it was in the reserve tank and the radiator is low you probably have a problem with your radiator cap. Replace it and see what happens.
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10-06-2011, 08:45 PM | #13 |
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Re: Ideal Running Temperature
Oh and I checked my temp gauge. When I sit and idle, the needle is below 230 so I'm estimating its reading anywhere from 200 to 220. And when I drive it'll drop to around 190. The sensor is in the same spot as the OEM Gauge. As for the thermostat, Im still insure if I'm running one.
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10-06-2011, 09:10 PM | #14 |
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Re: Ideal Running Temperature
For a quick check...
When the engine is cold, take the radiator cap off and then start the engine. If you see coolant flowing; then chances are you either have a stuck open thermostat or it has been removed. My truck seems to run best with the 190 degree thermostat. On my particular truck (1984), the vacuum advance source of vacuum is controlled by a temp switch.
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