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Old 05-16-2004, 05:49 PM
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High engine temp at idle.

I got my engine fired up today after a rebuild and I noticed the temp. was 205* to 210* at idle. I have a 19" flex fan and 2-800 cfm elec. cooling fans with a 3 row rad. Any idea why the temp was this high. I guess it could be an air bubble, but I'm not sure. I had to put a big floor fan in front of it to get it to 190*.

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Old 05-16-2004, 06:03 PM
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Bad Rat 44,

At idle your engine can not pull much air through the radiator. And if you have the hood open some air will just flow around the engine and not through the radiator. And the engine is "tight" because of the rebuild and will have more friction so you end up with higher temps. Put a few miles on the engine and I think the temp will come down.
Relax and Enjoy
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Old 05-16-2004, 06:16 PM
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That makes sence. I do have the hood off.
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Old 05-16-2004, 07:13 PM
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It shouldn't matter that much with the hood off. You need to have a good fan shroud. The fan should be half way in and out of the shroud for it to work efficiently.
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Old 05-16-2004, 07:30 PM
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It's a '67 Chevelle and I don't have a shroud for it. I do have these on it.

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Old 05-16-2004, 08:01 PM
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Which way are those electric fans blowing?

Are you fighting your flex fan?
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Old 05-16-2004, 08:35 PM
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They are blowing toward the engine.
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Old 05-17-2004, 05:40 AM
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You should have plenty of air flow with those fans. It is probably due to the friction of a tight engine. Run it in a while, and watch the temp.
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Old 05-17-2004, 05:55 AM
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If you had a shroud, you would not need the electric fans.

Troy

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Old 05-17-2004, 08:46 AM
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I didn't realy need them to start with I never had a heating problem. I just added them for extra protection. I think it's because of the tight parts.
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Old 05-17-2004, 09:45 AM
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Your radiator might be a little small for the motor, especially a motor that has high friction.
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Old 05-17-2004, 02:44 PM
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The rad. is what is called for in that model for a 396. I ran it today and the temp. has come down to 190* at idle. So it's getting better.
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Old 05-17-2004, 03:08 PM
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You need to find yourself a fan shroud for that fan and ditch the pusher electrics. They never cool as well as setting them up for puller. Alot of the air is deflected when it hits the rad and pushed back.

You need to either find that shroud and ditch the fans as they are most likely just blocking the air flow for your flex fan, or ditch the flex fan and put the fans on the other side of your radiator.

Whats the capasity of that radiator? What was the capasity of the original setup?
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Old 05-17-2004, 04:13 PM
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I'm not sure the cap. of the rad. I counted 6 gallons when I filled up the block and rad.
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