1967 running hot - Team Camaro Tech
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post #1 of 3 (permalink) Old Aug 15th, 10, 09:53 AM Thread Starter
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robert
 
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1967 running hot

During the restoration I added vintage air to my 67 conv.327 /275 power glide . New radiator new water pump 6 blade fan. the temp light would come on when sitting still with car in gear air on or off. I added an electric fan dropped the thermostat from 180 to 160. still light comes on. today I put a gauge on what should the max temp be with engine running.was running about190 down the road stopped at red light went up to 200 started down the road never went back down next stop 210. came back home in driveway 220. cut engine off and whent up to 240. Help please.
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post #2 of 3 (permalink) Old Aug 15th, 10, 10:26 AM
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Re: 1967 running hot

A shroud helps and a 23" wide rad core radiator helps and a little higher curb idle, say 700-750 rpm and you've made sure you have no air in coolant system, maybe an 18-22 lb cap with recovery bottle.

With A/C on, condensor temp adds to the ambient air flow. You might as a science project, duct tape some cardboard between the header and core support on top and from the bottom of the valance to core support to aid against recirculation of hot air to see if this action helps. If this project hepls, a permament solution is in the future. A member here has the plans for an alum plate on top to bolt in or get one from ebay store. you're on your own on the bottom plate.

Heat soak happens when the engine is turned off, no movement of air, common occurence - could add an engine compartment thermal switch to monitor temp and turn on fan to cool compartment, then shuts off when, say 180-190 is reached.

Engine temp of 200 isn't bad as most vehicles today run this hot.

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post #3 of 3 (permalink) Old Aug 15th, 10, 02:21 PM
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Re: 1967 running hot

The termostat has nothing tio do with the engine temp other than getting to temp quick to prevent wear etc, and restict flow for correct cooling in th radiator.
A engine will run =/- 5 deg of what ever thermostt spec is in there.
Note: not all thermosts are the same, make sure you have the correct GM unit..they come in std and hi flow..not a toyota or ford unit or whatever

As Everett meants ashround is a must as is having it fitting correct....you can use the factory or buy a fan with a shround that stops spillage of air off the end of the blades (an electric fan is shrouded) no shroud efficiency of air moved drops about 60%
Quote:
the temp light would come on
The idoit light sensor comes on at 235 deg F

My Spelling is not incorrect...it is creative

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