spark plug problem
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Le Mans Master
Joined: Oct 2004
Posts: 6,314
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From: South-central Missouri
Obviously, I haven't done the helicoil on a LT1 while mounted in a C4 Vette. So FWIW!
Drifting
Joined: Nov 2015
Posts: 1,332
Likes: 396
From: Clay New York
Exactly how many holes are stripped or think you stripped ? Did you try changing the plugs with the motor cold? Aluminum heads should be cold when removing the plugs to prevent stripping the threads. At least that is what I've read. I've done cars with over 100k and cars with half the mileage but over 10 years old and haven't had any problems. The only other precaution was I sprayed some WD40 on each plug and let them sit overnight first.
Last edited by ls777z; Mar 8, 2021 at 03:46 AM.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
I've heard of doing that w/o removing the head(s). But, just how I would be able to access some ports (#8 I had to access from below just to change the plug!) with the tool to re-thread the head and then insert the helicoil, all w/o leaving any metal filings in the chamber... I agree w/ Tom: pull the head and then you can also see if in fact the threads are stripped or was it the plug that is stripped (and will leave filings in the chamber if the head isn't removed first
Drifting
Joined: Apr 2014
Posts: 1,699
Likes: 231
From: Hawthorne CA
I've heard of doing that w/o removing the head(s). But, just how I would be able to access some ports (#8 I had to access from below just to change the plug!) with the tool to re-thread the head and then insert the helicoil, all w/o leaving any metal filings in the chamber... I agree w/ Tom: pull the head and then you can also see if in fact the threads are stripped or was it the plug that is stripped (and will leave filings in the chamber if the head isn't removed first.
Obviously, I haven't done the helicoil on a LT1 while mounted in a C4 Vette. So FWIW!
Obviously, I haven't done the helicoil on a LT1 while mounted in a C4 Vette. So FWIW!
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Drifting
Joined: Nov 2015
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From: Clay New York
Team Owner
Joined: Aug 2004
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From: Park City Utah
Advanced
Joined: Jul 2013
Posts: 60
Likes: 4
From: British Columbia
I second the Back tap rethreader, most of the work is a manual feel to get started properly !!!! then some mechanical help to "pull" the tap.
Has saved me time and money with personal jobs and customers. buy a good one, take your time explore that you have an appropriate amount of space. this may seem as if it is expensive however nothing like shoptime to re&re a head , a very efficient tool in one's box!!
Has saved me time and money with personal jobs and customers. buy a good one, take your time explore that you have an appropriate amount of space. this may seem as if it is expensive however nothing like shoptime to re&re a head , a very efficient tool in one's box!!
