So I finally got around to taking off the alternator cover to tighten up the starter motor mounting bolts that I suspect was causing a very small oil leak. But when bolting everything up I found a 4 bolts that had stripped holes. :-X 2 of them I can get a longer screw to grab onto threads deeper inside the hole but the 4th (behind the clutch slave) can't be helped much. I got it just barely snug with a screwdriver and don't have to worry about it backing out since it's behind the slave. Hopefully it doesn't leak. I don't think it will.
Anyway, the longer bolts grabbing more thread in the other 3 bolts won't last long I'm thinking. Knowing me I'll likely strip them the next time I take them off. I can be a bit ham fisted sometimes. [roll] Any suggestions on fixing these stripped holes so I know what to do when they finally give out?
Quote from: erkishhorde on April 15, 2009, 09:13:08 PM
So I finally got around to taking off the alternator cover to tighten up the starter motor mounting bolts that I suspect was causing a very small oil leak. But when bolting everything up I found a 4 bolts that had stripped holes. :-X 2 of them I can get a longer screw to grab onto threads deeper inside the hole but the 4th (behind the clutch slave) can't be helped much. I got it just barely snug with a screwdriver and don't have to worry about it backing out since it's behind the slave. Hopefully it doesn't leak. I don't think it will.
Anyway, the longer bolts grabbing more thread in the other 3 bolts won't last long I'm thinking. Knowing me I'll likely strip them the next time I take them off. I can be a bit ham fisted sometimes. [roll] Any suggestions on fixing these stripped holes so I know what to do when they finally give out?
If the cover was off before the bolts may have been shuffled and some may not be long enough. I think the one behind the slave will be problematic since the slave tries to move that part, but you might be lucky. If it leaks there the leak should not be bad, though.
If there is enough meat around the affected holes these are the answer:
http://www.timesert.com (http://www.timesert.com)
Heli Coil will do the trick. I have used them before on a Honda motor.
Brendan
Quote from: wiggy_nz on April 16, 2009, 01:06:41 AM
Heli Coil will do the trick. I have used them before on a Honda motor.
Brendan
Don't use a helicoil. Use a time-sert. They are a much better solution, and if installed correctly, stronger than the original threads. Google them.
Quote from: amcloud on April 16, 2009, 06:19:17 AM
Don't use a helicoil. Use a time-sert. They are a much better solution, and if installed correctly, stronger than the original threads. Google them.
Time sert is a great product, but for this application I think I'd use a helicoil too.
We're talking about a 6 mm screw, not a spark plug or cylinder stud.
Quote from: ducpainter on April 16, 2009, 06:25:07 AM
Time sert is a great product, but for this application I think I'd use a helicoil too.
We're talking about a 6 mm screw, not a spark plug or cylinder stud.
+1, cheaper too
those screws are not under a lot of torque, just a bit
the one behind the slave is the most important as the slave is trying to pull the cover off the cases every time you pull the clutch in.
the helicoil kit is expensive if you have only 1 to do, but if you're doing 4 it's not so bad and they're mighty useful. make sure you get the right size drill too and use some crc, wd40 or the like when drilling and tapping the thread.
TimeSert +1
Helicoil -1
Heh, the Helicoil site likes to flash around that it's a US product but payment options are in USD or Indian Rupees... [roll] I think I'll be researching this a bit. I've got some time... I think. I don't plan on fixing it just yet.
TIME-SERT.
Heli-coil ******only****** if you have to. Nevermind the bolt size/thread/torque value.
This is my opinion, YMMV.
I *think* Heli-coils may use a slightly smaller drill bit and tap. If that's true, then I'd go with Heli-coil since there isn't a lot of extra meat in the threaded area. Properly installed, they are going to work just fine. But if the tap size is the same, either method will work fine.
I think that just like the global warming issue, this one is split right down political lines. Everyone who insists Time-Serts for this one voted for McCain and Heli-Coilers went with Michelle's husband. See - if you don't agree with me on Heli-coils for this particular application I'll just get this thread locked. ;D
TimeSerts take smaller drills and taps than Helicoils.
Lol, the timesert instructional video has a sales pitch at the end that says they have inserts with thicker walls in case you need to fix a helicoil that failed. [laugh]
I've got the whole kit, and inserts too. ;)
Hmmm... This kind of repair is most likely done with the cover off, yes? Me thinks Nick will be seeing me the next time I need an oil change. Hmmm... I should note which ones are damaged now before I forget. As it is I can only remember 3 of them... Coulda sworn there was a 4th...
Yes, cover off for the repair.
Quote from: Speeddog on April 16, 2009, 11:42:15 AM
TimeSerts take smaller drills and taps than Helicoils.
Interesting. I Googled and there must be 500 similar threads on teh interweb. One of the common plusses given for heli-coil use was the smaller drill and tap. But... when I found drill size tables for both types the size I cross-checked (8mm), the recommended Time-sert drill bit actually was a few thousandths of an inch smaller.
Quote from: Langanobob on April 16, 2009, 10:40:16 AM
I *think* Heli-coils may use a slightly smaller drill bit and tap. If that's true, then I'd go with Heli-coil since there isn't a lot of extra meat in the threaded area. Properly installed, they are going to work just fine. But if the tap size is the same, either method will work fine.
I think that just like the global warming issue, this one is split right down political lines. Everyone who insists Time-Serts for this one voted for McCain and Heli-Coilers went with Michelle's husband. See - if you don't agree with me on Heli-coils for this particular application I'll just get this thread locked. ;D
Not true about the voting ;D Time-Serts are better, Heli Coils are good enough for this application, but, as Langanobob said, use whichever leaves more meat is left over.
Quote from: Duck-Stew on April 16, 2009, 10:28:51 AM
TIME-SERT.
Heli-coil ******only****** if you have to. Nevermind the bolt size/thread/torque value.
This is my opinion, YMMV.
What do you know? [laugh] [laugh] [laugh] [laugh] [laugh] [laugh]
Seriously...
before there were time-serts, helicoils worked fine for those kinds of repairs.
I'm not disputing that the time-sert is a better product, but experience tells me that a properly installed helicoil
does work for that application.
I just think it's overkill...
and one thing Stu and I always agree on is...
YMMV.
It depends on how much meat is surrounding that screw hole. If there is plenty, go time sert. If the wall is pretty thin, use the helicoil. They both work fine.
Either way, the finished hole is stronger than the original thread.
Stirp them all and have Nick fix them all, problem solved. [thumbsup]
Quote from: trouble on April 17, 2009, 11:26:00 AM
Stirp them all and have Nick fix them all, problem solved. [thumbsup]
Honestly, that thought did cross my mind... Well, not purposefully stripping them, but just plain slapping timeserts in all of them. [roll]
Let me know beforehand if you want to Timesert them all, so I can order more inserts. :P
Really not necessary to do them all, it's not a cover that you have on and off frequently.
I wonder if someone can help..
I saw this thread concerning the alternator bolt hole - and somehow (make the beast with two backswitsia???) - I've or someone who's been working on my bike has managed to strip the lower front hole for the belt cover of the horizontal cylinder - there's not that much meat there - so would the Helicoil kit be best for this application?
Anyone know what size it would be? I'm thinking M6 - I will really need to know what I need for this before I order - I'm in Thailand, and vendors are not many - I may need to order it - or at least be damn sure I ask for the right thing ;)
Many thanks,
Quote from: brad black on April 16, 2009, 06:35:03 AM
the one behind the slave is the most important as the slave is trying to pull the cover off the cases every time you pull the clutch in.
the helicoil kit is expensive if you have only 1 to do, but if you're doing 4 it's not so bad and they're mighty useful. make sure you get the right size drill too and use some crc, wd40 or the like when drilling and tapping the thread.
Cool Tool is the product you want. Cutting and tapping fluid.