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#62189 06/25/2006 11:38 PM | Joined: Oct 2005 Posts: 34 Junior Member | | Junior Member Joined: Oct 2005 Posts: 34 | I have a ’49 Chevy 1 ton with a 235 from ’55. Runs great and warms up slowly. But it continues to warm up until the needle almost touches the square under 220 on the temp gauge. Can the original temp gauge read incorrectly or are they pretty accurate over the years? What is the proper running temp of a 235 in-line?
Frank
1949 Chevy 3800
1929 Chevy International
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#62190 06/26/2006 12:28 AM | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | My 38 has a 160 deg thermostat & runs at about 170 during the summer. If you are running close to 220 while the engine is running you probably need either a thermostat or a boiling out of your radiator. If you are concerned about the reading being high after shutting the engine off that is normal. You still have all of the heat in the engine with no circulation to get it to the radiator. The coolant still in the engine will get quite hot & your gauge will reflect that.
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#62191 06/26/2006 2:11 AM | Joined: Nov 2005 Posts: 1,048 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 1,048 | It sounds like your thermostat is stuck part way open (not totally unusual) Slow warn up indicates it is not closing all the way, and high running temperature indicates it is not opening fully. Your engine should run with 10 degrees or so of the temperature stamped on the ‘stat. You might try taking it out and placing it in a pan of boiling water, it should open fully and then close completely a few minutes after removing it. | | |
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