 Leaking exhaust at head..., multiple copper gaskets / more muscle on those exhaust nuts |
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| Jax914 |
 Oct 8 2007, 09:57 AM
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Schwienhund Rennenmannshaft  Group: Members Posts: 138 Joined: 7-August 06 From: Jacksonville, FL Member No.: 6,602 Region Association: South East States  |
Okay,
I'm looking for some ideas.... I have a 1971 1.7 - stock heat exchangers, manta exhaust. I've replaced the copper gaskets between the heat exchanger and the head, applied what I think is way too much torque to the exhaust nuts and can't get it to stop leaking. I removed the exchanger and made sure the top of the flange is level and smooth. When I start it up and crawl under, I can feel the leak. My thoughts are to try running two gaskets?!? Anyone else have similar problems? TIA, |
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| davep |
Oct 8 2007, 10:10 PM
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914 Historian Group: Benefactors Posts: 5,262 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
Len did not mention it, but he has commented in the past that the seating surface for the copper rings can warp and will no longer seal. On one of my heads that he rebuilt there was a large hole that required welding. I do believe that all heads that he rebuilds have the seats remachined.
Never ever double up on the copper rings. Always leave the nuts loose until the entire exhaust system is installed. Once you have a loose fit on all the parts, only then you can start to torque up the various nuts. |
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Posts in this topic
Jax914 Leaking exhaust at head... Oct 8 2007, 09:57 AM
Bartlett 914 The ears on the HE pipes may be hitting the boss f... Oct 8 2007, 10:14 AM rhodyguy if you went thru the torqueing sequence and ran th... Oct 8 2007, 10:27 AM HAM Inc Because the studs are outside of the sealing flang... Oct 8 2007, 11:27 AM rhodyguy forgot to add, make SURE all the rings are out... Oct 8 2007, 11:34 AM KaptKaos I was installing mine this weekend. I just want t... Oct 8 2007, 11:38 AM
Dan (Almaden Valley)
I was installing mine this weekend. I just want ... Oct 8 2007, 11:39 AM rjames
Mind Kevin on this one!! Oct 8 2007, 08:17 PM BMartin914 Torque exhaust nuts to 18 ft/lbs. More and you ris... Oct 8 2007, 09:39 PM KaptKaos
Torque exhaust nuts to 18 ft/lbs. More and you ri... Oct 8 2007, 10:09 PM Cap'n Krusty Begin with the assumption that double gaskets NEVE... Oct 8 2007, 11:25 PM jk76.914 If you haven't seen this already.... I tried ... Oct 9 2007, 05:09 AM Jax914 thanks everyone....hopefully I'll have some ti... Oct 9 2007, 06:55 AM jk76.914 Be careful on the torque. I'd say 18 ft-lbs i... Oct 9 2007, 05:54 PM ChrisNPDrider My system for almost all repairs is to tighten, dr... Oct 9 2007, 07:20 PM Jax914 Haven't done anything yet....but to answer - y... Oct 9 2007, 08:11 PM |
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