cold header tube - Team Camaro Tech
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post #1 of 4 (permalink) Old Jun 20th, 02, 10:05 AM Thread Starter
Join Date: Feb 2000
Posts: 101
I am hoping this has happened to somebody else, because I can't explain it.
I had trouble starting my 68 Camaro this spring. The plugs were flooding and it wouldn't idle. I have since reset the floats in the carb, and the needles and seats have been cleaned, along with the plugs cleaned and regapped.
The car started after doing these things and idles after warming up. However, I noticed that my #2 header tube was cold after 10 minutes run time. I started using my multimeter and checking wires and plugs for resistance. I cleaned that plug off again, and installed a new set of wires, because I knew my old set had a few nicks. I fired it up today and #1 header tube stayed cold, but #2 got hot. The only thing changed was the wires. I removed the new #1 wire and installed the old #1 wire, and the tube stayed cold. I could grab the tube with the car running.
Sorry for the long post, but I don't know what is going on. Any suggestions??
rodsters is offline  
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post #2 of 4 (permalink) Old Jun 20th, 02, 12:59 PM
Senior Tech
Join Date: Apr 2002
Location: puntagorda fl u.s.
Posts: 122
first do a compression check on that cylinder, the rings may be stuck. put a new plug in that cylinder if compression is ok. if its not try letting the motor fully warm up to hopefully get the rings to release. I can remember my grand dad having a similiar problem years ago that was stuck rings in a 64 chevy he didnt drive in the winter carbon was the culprit. he fixed it one year by spraying starting fluid in the cylinder then firing it up. (not suggested) the following year same problem this time he pulled the head an found a valve stem leak that had carboned up the cylinder making the rings stick in the same cylinder as last year. he had the head redone an took a wood hammer handle an rapped the piston a good one to loosen the rings. then a good decarbon no more problems. good luck let us know what you find
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post #3 of 4 (permalink) Old Jun 20th, 02, 03:23 PM
Join Date: May 2002
Posts: 23
Happened to me once with a fouled spark plug. Could touch the tube with my bare hand. Hmmm, strange, I thought headers ran hotter than that. So, I grabbed the next one. Bam! That left a mark.

Depending on how bad the plug is, cleaning it may not fix it. Try swapping plugs with a hot cylinder and see if the coldness trades places.
trex is offline  
post #4 of 4 (permalink) Old Jun 20th, 02, 04:44 PM Thread Starter
Join Date: Feb 2000
Posts: 101
That's what was weird. I didn't do anything to the #1 spark plug. Maybe I'll pull all the plugs out tomorrow and check them. I do have another set ready.
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