 Engine problem, Cooling |
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| stevend914 |
 Jul 3 2018, 11:04 AM
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#1
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Member  Group: Members Posts: 376 Joined: 13-December 16 From: Saint Louis Member No.: 20,670 Region Association: Upper MidWest 
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My car overheats on long drives when the ambient temp gets above 80F. The car does not have the thermostat or cable attached to the cooling flappers. I've rotated the flapper rod and I can hear the flappers. Without the thermostat, the flappers should be in the open position, correct? But the car still overheats. (IMG:style_emoticons/default/hissyfit.gif) Maybe the flappers are closed? Any thoughts? Thanks
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| Spoke |
Jul 3 2018, 11:10 AM
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#2
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Jerry Group: Members Posts: 6,989 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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Is it running lean? Timing and valve adjustment can make a difference too.
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| JOEPROPER |
Jul 3 2018, 11:35 AM
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#3
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The answer is "no" unless you ask... Group: Members Posts: 1,184 Joined: 21-November 15 From: White Plains New York Member No.: 19,387 Region Association: North East States
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the flappers default to the full open position.
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| JamesM |
Jul 3 2018, 12:07 PM
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#4
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Senior Member Group: Members Posts: 1,915 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(stevend914 @ Jul 3 2018, 09:04 AM)  My car overheats on long drives when the ambient temp gets above 80F. The car does not have the thermostat or cable attached to the cooling flappers. I've rotated the flapper rod and I can hear the flappers. Without the thermostat, the flappers should be in the open position, correct? But the car still overheats. (IMG:style_emoticons/default/hissyfit.gif) Maybe the flappers are closed? Any thoughts? Thanks 1. Define/quantify overheats? 2. What motor? 3. Carbs or FI? |
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| stevend914 |
Jul 3 2018, 12:53 PM
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#5
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Member Group: Members Posts: 376 Joined: 13-December 16 From: Saint Louis Member No.: 20,670 Region Association: Upper MidWest
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QUOTE(JamesM @ Jul 3 2018, 01:07 PM) QUOTE(stevend914 @ Jul 3 2018, 09:04 AM) My car overheats on long drives when the ambient temp gets above 80F. The car does not have the thermostat or cable attached to the cooling flappers. I've rotated the flapper rod and I can hear the flappers. Without the thermostat, the flappers should be in the open position, correct? But the car still overheats. (IMG:style_emoticons/default/hissyfit.gif) Maybe the flappers are closed? Any thoughts? Thanks 1. Define/quantify overheats? 240-250 2. What motor? 2.0 3. Carbs or FI? fi |
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| rhodyguy |
Jul 3 2018, 01:06 PM
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#6
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
The tab the bellows wire attaches to should be up. If you've never cleaned the oil cooler, chances are it's all gunked up.
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| Ferg |
Jul 3 2018, 03:59 PM
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#7
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914 Guru Group: Members Posts: 5,948 Joined: 8-January 03 From: Boulder CO Member No.: 116 Region Association: None
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Could be a multitude of things.
Is this a recent occurrence? If so what has changed since last summer or drive? If this is a new to you car, or you have limited driving in heat on Highway ect you will likely need to start looking at things one by one. 1. Borrow a bore scope and look under the tins, verify oil cooler is leaf and gunk free. Do the same for the barrels, fan ect. 2. Check your MPS and make sure it's correct for motor and functions. 3. Confirm timing dwell ect. 4. Borrow a exhaust analyser and see where you are on mixture 5. Buy a cheap IR Thermometer and confirm actual oil temp. |
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| porschetub |
Jul 3 2018, 07:03 PM
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#8
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Advanced Member Group: Members Posts: 4,703 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Engine compartment seal good ? plug seals all in place ?,engine tin all present and in place?,no vacuum leaks? is the engine clean or oil and dirt covered ? and then all the stuff already mentioned,one or more or all these thing can have a huge difference in running temp,don't run your engine too long if its overheating it can really bugger up an aircooled engine in a big way.
Good luck. |
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