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Overheating at high speed/rpm

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Old Aug 5, 2002 | 03:45 PM
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92RSB4C's Avatar
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From: Friendswood(Houston),Texas,USA
Overheating at high speed/rpm

Hmm, this is weird. The faster I go, the hotter my car gets. At 70 Mph, I'm running around 3,000 rpm. My cars temp slowly rises. Today, I got on the freeway at 200* and went 10 miles or so, and rose to 235*, still rising as I got off the freeway. I have a band new water pump, brand new rad. cap, and no t-stat in it. The rad. is 1 year old, and still works good, I had it checked. Any ideas?
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Old Aug 5, 2002 | 06:41 PM
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breathment's Avatar
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From: Bedford, Tx
look to make sure u have the air dam installed, im pretty sure its your problem, it may look a little different on a camaro then what u see in the picture.. But you should know if its missing..
Attached Thumbnails Overheating at high speed/rpm-airdam.jpg  
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Old Aug 5, 2002 | 08:38 PM
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Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Yep, check for the air dam. Also check to make sure your lower radiator hose isn't collapsing under high rpms.
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Old Aug 6, 2002 | 12:30 AM
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From: Friendswood(Houston),Texas,USA
Yeah, I have an air dam. I'll have to check out the lower rad. hose tomorrow. Also, could 90* elbow bends, made of plastic, installed in the hose that runs from the heater core to the intake be restricive enough to cause that? I have 2 installed to make the hoses a little easier to work with.

Thanx
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Old Aug 7, 2002 | 09:02 AM
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From: Friendswood(Houston),Texas,USA
I checked out the lower rad. hose, and it started to flatten out as rpm increased. I checked it 5 minutes later and it didn't do it. It's a brand new hose made by ecr. Any ideas? What causes it to flatten out?
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Old Aug 7, 2002 | 12:29 PM
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From: NE
Car: 82 camaro SC
Engine: 350
Transmission: 700r4
It should have a spring in it to prevent it from flattening. Stick a timing light on that engine and post the timing at 3000 rpm. Could also be running lean and cause an overheat problem.
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Old Aug 7, 2002 | 02:25 PM
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From: Friendswood(Houston),Texas,USA
It does have a spring in it.
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Old Aug 7, 2002 | 04:15 PM
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From: Friendswood(Houston),Texas,USA
Total spark adv. at 3000rpm is 38*
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Old Aug 9, 2002 | 09:15 PM
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From: Friendswood(Houston),Texas,USA
ttt
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