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Old 04-29-2014, 08:12 AM   #1
TheRadBaron OP
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R1100GS head bolt (Allen head at rear of head) thread?

I'm preparing to change the leaky head gaskets on my '97. Each head has the four main studs and one bolt near the rear of the head with an allen or socket head. I believe that the manual refers to it as the 10mm bolt. When I retorqued the heads a few months ago I noticed that this bolt seems to be beginning to strip out on my left cylinder. I'd like to order a thread repair kit to have handy when I do the job but I'm not sure what thread size I need.
Does anyone know for sure what it is? I'm guessing that it's M10x1.25 but it's just a guess. Thanks.
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Old 04-29-2014, 10:10 AM   #2
boxermoose
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Find the bolt on an on-line parts fisce like what MaxBMW has - the parts list usually lists the bolt size and pitch
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Old 04-29-2014, 06:13 PM   #3
Murkidi
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6mm x 1.0
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Old 04-29-2014, 06:52 PM   #4
TheRadBaron OP
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We must be thinking of a different bolt. The one that I'm referring to is most definitely bigger than 6mm. I know that there are a few 6mm bolts on the bottom of the cylinder that are on the outside, i.e. not under the valve cover. The one that I'm talking about is under the valve cover with the head studs.
I just checked the fiche at Max BMW and it just lists the bolt as "M10x70". So it is 10mm but it doesn't give the pitch.
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Old 07-06-2014, 07:46 AM   #5
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Turns out that it's 10x1.5.
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Old 07-06-2014, 07:33 PM   #6
BleedbeemR
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blot

look at time-certs,A dealer from Maine ?, puts together a repair kit just for that. The quality of their tools top notch and the head bolts have held for the past 25,000 miles. Good luck
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