 Tightening Head Nuts on 2.0 Heads, Why won't some snug up? |
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| phantom914 |
 Mar 11 2005, 12:51 PM
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#1
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non-914-owner non-club member  Group: Benefactors Posts: 1,013 Joined: 24-February 04 From: Covina,CA(North ofWest Covina) Member No.: 1,708   |
I am reassembling a stock 2.0 but it seems that no matter how many times I re-check with the torque wrench, some of the nuts on the head studs still turn a little bit every time while others hold steady after their first torque to 23 ft-lbs.
I torqued in the correct sequence as recommented in the Wilson rebuild book. But, as I said, when I let the engine sit and then go back and re-check, some of those damn nuts turn slightly. I finally pulled a head and cylinders off and removed the studs. The threads in the case appear normal, with nice, sharp threads, so I don't think the studs are pulling out, or can one tell just by looking? . Also, it seems that some of the long studs are doing this, but not the shorter top studs. What could be going on? I can't imagine that the studs are stretching. Should I just duct tape the heads on? Glue? Chewing gum? Andrew |
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| bondo |
Mar 11 2005, 12:57 PM
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Does the spec call for anti seize or oil on the threads and under the nut? I've been told before to back off 1/4 turn or so before retorquing, but that was for a water cooled engine.
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| bondo |
Mar 11 2005, 12:58 PM
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#3
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
You going to the speed fest in fontana with me and Tony? (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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| phantom914 |
Mar 11 2005, 02:56 PM
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#4
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non-914-owner non-club member Group: Benefactors Posts: 1,013 Joined: 24-February 04 From: Covina,CA(North ofWest Covina) Member No.: 1,708 |
Hmm. I did apply anti-seize to the short studs since they are exposed and rust, but I did not apply any to the long studs which are under the rocker cover and get oiled. Could that make a difference I wonder? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) Andrew |
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| phantom914 |
Mar 11 2005, 02:57 PM
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#5
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non-914-owner non-club member Group: Benefactors Posts: 1,013 Joined: 24-February 04 From: Covina,CA(North ofWest Covina) Member No.: 1,708 |
Doubtful. Can't go to WCC either for the same reasons. Andrew |
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| bondo |
Mar 11 2005, 03:27 PM
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#6
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
It makes a big difference! Find out what the spec calls for (factory manuals maybe?) and do what it says for all studs. Hopefully that will fix it. (An alternative would be to ask Jake (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) ) We'll take lots of pics at the speedfest! |
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