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Old 08-30-2008, 07:08 PM   #1
dougs650 OP
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stripped oil filter cover bolt hole

Last week when I changed the oil on my R100GSPD, when removing the oil filter cover, one of the bolts did not seem right. Today I inspected it again and retorqued it. Well, the bolt hole is definitely stripped. Although I personally have not used heli-coils or similar technique, what do you guys recommend to remedy this ?

Also, I am assuming it will be ok to ride given the two other bolts are nice and snug and should hold the foil filter plate tight and flat.

Doug...
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Old 08-30-2008, 07:11 PM   #2
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Always a good time to learn how to use helicoils.
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Old 08-30-2008, 07:56 PM   #3
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My experience with three-bolt setups is that, if one is not tight, there will be weeping and seeping..... The engine/cover etc all heat up and cool off, moving ever so little, but enough to be "not right".

You could probably get by with some gasket gunk, even put some in the bolt hole, but it will definitely need a "proper fix" at some point.

Oil passages are not a good place for compromise!
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Old 08-30-2008, 08:55 PM   #4
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If its not too badly bunged up in there, it may be possible to get away with chasing the hole with a clean tap the same size as the original.. It might get rid of some crapola and give you enough clean purchase to snug up on it, for a while. It really only needs 3 or four or five good threads in a row
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Old 08-30-2008, 09:09 PM   #5
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it's toast

Thanks for the responses. I am convinced it's toast, as it rotates almost freely and gains no resistance to torque. It had definitely been overtorqued, and with my propensity to give it just a little extra, probably did not help.

Heli-coil time, with some other rejuvination work.

Doug...
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Old 08-30-2008, 09:22 PM   #6
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good place to practice before you have to do the same thing to the head studs
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Old 08-30-2008, 09:27 PM   #7
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confidence

I just read a thread on that. .... I hope not !
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Old 08-31-2008, 04:53 AM   #8
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Quote:
Originally Posted by Stagehand
good place to practice before you have to do the same thing to the head studs
Or the oil pan bolts...
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Old 08-31-2008, 02:15 PM   #9
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My "temporary" solution a long time back was to get a slightly longer bolt and get it in just a few mm deeper using some washers. There's a little bit of extra thread down there which in my case was enough to keep the bolt tight. 4000 kms later the bolt is still there, no leaks yet, so I guess helicoiling can maybe wait a little longer.
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Old 08-31-2008, 02:20 PM   #10
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Quote:
Originally Posted by Stagehand
It really only needs 3 or four or five good threads in a row
Try fitting a size longer (+5mm) bolt to keep it oiltight for now.

Final repair can wait untill a more convinient time.

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Old 08-31-2008, 02:51 PM   #11
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Doug,

I guess if you have to ride it than give it a go but I would want to repair it before I head out on it again. Call Bruce at Boxers by Bruce and he would be a great resource. I have watched him helicoil cylinder studs and oil pan bolts with no problem. At the least he can make it easier to get the right kit.

Sorry to hear of your troubles
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Old 08-31-2008, 05:37 PM   #12
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neat idea.

I'll try the longer bolt thing and report back. By the way, I did take it for a short ride today just to check it out. No weeps, or seeps.

Doug...
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Old 08-31-2008, 09:03 PM   #13
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a fix

Paul,

With an extra washer, and longer (+5 mm) bolt, I was able to tighten it down. Great recommendation, and many thanks. Cheers !

Doug...
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Old 09-01-2008, 02:22 AM   #14
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Glad to hear of your easy fix.

Another technique I use is to get the next size bolt, usually in the SAE size as the next larger Si bolt would be too large. I now recall doing that to one of the axle clamp bolts in front
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Old 12-15-2008, 06:45 PM   #15
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viva Time-Sert

All,

To close out this story, this last weekend I installed a Time-Sert insert into the referenced stripped bolt hole. Although I had initially considered a heli-coil solution, after a reading a few responses posted on this forum, and reviewing some other online material, I went the Time-Sert path. While more pricey, I am convinced the installation will never give me problems. If anyone is interested, here is a link to a good video that I learned from, and another link to the place I ordered the kit. Cheers,

http://www.youtube.com/watch?v=Gxnm8J9WXz8
http://www.hrpworld.com/index.cfm?tp...action=product

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