Maintenance & Technical > KX500 Original
Stripped drain plug....best fix?
ShanMan:
OK, call me a dumb-assed Gorilla :shock: but I overtightened the drain plug last time and now the d**n thing is stripped and won't come out. I figure I will be able to get the bolt out one way or the other, but I am curious about the proper way to fix the trashed threaded hole? I suspect that using a Heli-Coil or a Keensert would be great for integrity of the thread, but can you seal it? Maybe it's better to simply drill and retap the housing? Anyone here done this and could help a brother out? :lol: Thanks in advance. :)
alan:
--- Quote from: ShanMan ---OK, call me a dumb-assed Gorilla :shock: but I overtightened the drain plug last time and now the d**n thing is stripped and won't come out. I figure I will be able to get the bolt out one way or the other, but I am curious about the proper way to fix the trashed threaded hole? I suspect that using a Heli-Coil or a Keensert would be great for integrity of the thread, but can you seal it? Maybe it's better to simply drill and retap the housing? Anyone here done this and could help a brother out? :lol: Thanks in advance. :)
--- End quote ---
Heli-coils are used all over the automotive industry, I see nothing wrong with using them for this application!
Alan :D
Rick:
I agree. However, I like the thread insert better than the coils, as they seem to work better longer because they are a solid piece with threads on the outside and the inside.
Just my $.02.
Rick
kxtaz:
helicoil or timesert[solid threaded insert] will work.i prefer timeserts over helicoils but timesrts are a little exspensive and harder to find especially in metric sizes. I suspect that using a Heli-Coil or a Keensert would be great for integrity of the thread, but can you seal it?[/list:u] the drain bolt has copper washer [which is actually a copper gasket] that seals between head of bolt and engine case. helicoil or timesert will not effect drain bolt sealing properly.
QuantumDuck:
Your gonna need to find an M10x1.5 helicoil kit....
Once you get the bolt out, use a variable speed drill and apply a very THICK coating of bearing grease to the drill bit...drill the hole VERY slowly...once you feel the drill bit biting into the metal...STOP...pull the bit out and wipe off the grease from the drill bit...the grease will hold the metal shavings onto the bit, keeping the shaving from inside your crankcase...for drilling the hole, you should clean off and reapply the grease about 5-6 times........
After you get the hole drilled out...go through the same procedure with the tap...lots of grease...get a few metal shavings on it...pull it out...clean it off...reapply grease and so on till the hole is tapped...reapply the grease on the tap about 7-8 times and you will have NO problems with little, tiny pieces of metal shavings in the crankcase...a pair of needlenose pliers does a good job of snapping the tine off the helicoil after it's inserted...get you a new copper crush washer and you should be all set to go...
Just for the record.....I did this 2 weeks ago and now I have no more leaks around my drain plug...now I just have to fix that pesky leak around the front sprocket :mrgreen:
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