Svengouli7 Posted August 20, 2003 Share Posted August 20, 2003 12mmx1.25? 1.5? did the search (first archival dig of mine on the new board) found a thread.. yet only stayed confused. Thanks guys Caleb (the soobie nerd formally known as Subrina7) Quote Link to comment Share on other sites More sharing options...
TomRhere Posted August 20, 2003 Share Posted August 20, 2003 And you are wanting to re-tap which threads in the head? Quote Link to comment Share on other sites More sharing options...
Svengouli7 Posted August 20, 2003 Author Share Posted August 20, 2003 (should have been clearer) the head bolt threads in the block. Quote Link to comment Share on other sites More sharing options...
Svengouli7 Posted August 21, 2003 Author Share Posted August 21, 2003 Quote Link to comment Share on other sites More sharing options...
toybuilder Posted September 18, 2003 Share Posted September 18, 2003 It is M11 x 1.25. A fairly uncommon size...... I just ordered the tap and die from MSC for about $20. Quote Link to comment Share on other sites More sharing options...
Svengouli7 Posted September 18, 2003 Author Share Posted September 18, 2003 thanks Toybuilder. Ended up doing 3 7/16 coarse heli coils. Problem I encountered at that stage was keeping the drill plumb to the short block surface- 1 out of 3 seemed straight when finished, placing head on was tight since 2 studs were off a hair facing either way. For furture reference, any tips on keeping that drill more plumb? I did not see a real practical wa to set up a guide.. tried to check against a square but that became irrevelant once the metal started curling out. Quote Link to comment Share on other sites More sharing options...
asavage Posted September 18, 2003 Share Posted September 18, 2003 Somewhat related . . . To replace the O2 sensor on my '93 EA82, and not having the special tool, I had to remove the upper and lower heat shield around that junction, where the two headpipes join. To do that, I had to unbolt the headpipes from the heads to drop the whole pipe assy down far enough to remove the upper junction heat shield. Naturally, three of four studs came out of the head, instead of the nuts coming off of the studs. Also naturally, the studs galled coming out, dragging some aluminum threads with them. The holes are 10mm x 1.25mm pitch, which, if you're familiar with the metric stuff, is the "middle" of the 10mm coarse/medium/fine thread pitch smorgasbord. Fortunately! I have access to a 10mm x 1.25 Helicoil set This is not a terribly common size. Astoundingly, I also have the correct drill size to prep the hole. And, there's actually room to manoeuver the drill under there, unlike most in-the-car stripped hole repair jobs. And my local parts store actually had the correct 10mm studs, correct length and everything. Quote Link to comment Share on other sites More sharing options...
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