crank shaft thread damage
crank shaft thread damage Hey guys....I recently just did a cam install on my ls1 for the first time. Everything was foinf smooth till I got to the balancer removal. I was reading rhe gow to on ls1howto.com and it said it use the stock bolt to help pull the balancer off....so I did....and noe the thread for the stock bolt and shaft is damaged. I tried screwing in my new bolt and wouldnt even go in. Everything on the motor is back together but the balancer pulley....i magaged to get thw pulley on a little but i still needa abeother inch or so....what should I and can I do about the threads.....please help....
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
First thing I would try is to dremel two or three slits up a good bolt. Start from the end and make the cuts through the threads and go 5-10 threads up the bolt. Lube it up and run it in and out of the crank, cleaning the cut flutes out each time. It will act as a makeshift tap, and restore the threads if they can be saved.
How did the threads get wrecked, did you stick the bolt of the 3 jaw puller in the snout hole ?
You can try to buy a 16mm x 2.0 tap and clean the threads but there is a very good chance the threads are damaged beyond retapping.
You can try to buy a 16mm x 2.0 tap and clean the threads but there is a very good chance the threads are damaged beyond retapping.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Probably used the bolt head to push on. I know I do when I remove the pulleys but I also have an extended bolt I made to ensure the threads stay fully engaged during the process.
I followed the instructions on ls1howto.com and used the stock bolt to push against to remove the balancer. I did some searching and found the tap for the crank is m16x2.0. I found a few on ebay and hopefully I can find some in my local stores later today....the tap should work correct?
It sounds like you turned the bolt out to far to push on it with the puller and you wrecked the first few threads.
A regular tap will probably work as it's tapered and should find it's way into the original threads.
Go slow, back it out often and use plenty of oil.
A regular tap will probably work as it's tapered and should find it's way into the original threads.
Go slow, back it out often and use plenty of oil.
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I followed the instructions on ls1howto.com and used the stock bolt to push against to remove the balancer. I did some searching and found the tap for the crank is m16x2.0. I found a few on ebay and hopefully I can find some in my local stores later today....the tap should work correct?
Attachment 453646
Attachment 453646
FYI for the future get your self one of these next time you pull the pulley...
https://www.google.com/search?q=otc+...w&ved=0CBkQsxg
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Don't know if any of these places are close ???
https://www.google.com/search?hl=en&...43.rjdrhNDq1Zc
https://www.google.com/search?hl=en&...43.rjdrhNDq1Zc
I really wish they would take down that web site. Don't use ls1howto for re-installation or you will have bigger problems. Make or buy the correct tool to install the pulley once the threads are fixed.
http://www.grainger.com/product/WIDI...358?s_pp=false
Grainger Supply lists exactly what you're looking for, $33. Go to their web site and do a location search. There should be a few outlets in your area. Call around until you find one in stock.
Grainger Supply lists exactly what you're looking for, $33. Go to their web site and do a location search. There should be a few outlets in your area. Call around until you find one in stock.
http://www.grainger.com/product/WIDI...358?s_pp=false
Grainger Supply lists exactly what you're looking for, $33. Go to their web site and do a location search. There should be a few outlets in your area. Call around until you find one in stock.
Grainger Supply lists exactly what you're looking for, $33. Go to their web site and do a location search. There should be a few outlets in your area. Call around until you find one in stock.
Ok thank you very much paul and bob. I just found A grainger 7 miles from me. Going there in a little while.
Last edited by Gotit4cheap16; May 30, 2014 at 02:09 PM.