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How can I fix stripped threads in the Engine Block?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=63936		 Page 1 of 1
Author:  white69mach1 [ Thu Dec 01, 2011 8:59 pm ]
Post subject:  How can I fix stripped threads in the Engine Block?
I am doing my Timing belt and when I attempted to install the exhaust idler pulley, I found that the tip of the threads in the engine block are stripped. The first 1/8 or so are stripped, what are some of my options to fix this?
Author:  ATXKJ [ Thu Dec 01, 2011 9:59 pm ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
Helicoil - need the correct thread
- but they have kits with the drill bit

actually - you said 1/8 - you might be able to clean that up with a tap - or even a screw that has the threads ground down slightly
Author:  BlackLibertyCRD [ Fri Dec 02, 2011 12:57 am ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
They have such thing as a thread chaser that don't undercut like a tap.
Author:  CIMARRON13 [ Fri Dec 02, 2011 5:06 am ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
I have a retread kit that I have used to clean up bolts and nuts. I bought it as sears for around $50 years ago. Came with all the different sizes that I have ever needed. A friend used it once on his engine block after cross threading a bolt. Worked great.
Author:  WolverineFW [ Fri Dec 02, 2011 11:11 pm ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
BlackLibertyCRD wrote:
They have such thing as a thread chaser that don't undercut like a tap.


Try this first....save you a big headache if you can clean it up enough.
Author:  white69mach1 [ Fri Dec 02, 2011 11:33 pm ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
The thread is a reverse thread. I am guessing that a regular thread chaser isn't going to work. Am I correct in this thinking?
Author:  Joe Romas [ Sat Dec 03, 2011 9:20 am ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
white69mach1 wrote:
The thread is a reverse thread. I am guessing that a regular thread chaser isn't going to work. Am I correct in this thinking?


Your totally correct if it's a left hand thread.
Author:  papaindigo [ Sat Dec 03, 2011 10:37 am ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
Check around for a left hand tap in the appropriate size. They are not that hard to find even Sears has them. Alternatively if you can find a reverse thread bolt of the proper size it's apparently, I'll let others that have done this weigh in, possible to grind/file the tip to make a thread chaser.
Author:  white69mach1 [ Sat Dec 03, 2011 4:54 pm ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
papaindigo wrote:
Check around for a left hand tap in the appropriate size. They are not that hard to find even Sears has them. Alternatively if you can find a reverse thread bolt of the proper size it's apparently, I'll let others that have done this weigh in, possible to grind/file the tip to make a thread chaser.


Thanks for the help, I was able to make a thread chaser out of a the old bolt for the idler pulley using a dremel. Now its time to put everything back together.
Author:  papaindigo [ Sat Dec 03, 2011 5:24 pm ]
Post subject:  Re: How can I fix stripped threads in the Engine Block?
Be careful putting the tensioiner back on as both geordi and lgoodbar found there was what's apparently a factory installed helicoil where the tensioner threads in. That helicoil will pull out if you try to install the tensioner last.
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