Help broken valve cover bolt gl1100

Information and questions on GL1100 Goldwings (1980-1983)
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Motorcycle: Gl1100 1982 cafe racer

Help broken valve cover bolt gl1100

Post by alpom » Sat Dec 23, 2017 12:25 pm


I bought a 1982 GL1100 this summer. Slowly transforming it into a cafe racer.

Both valve cover were leaking a bit. so I was planing on adjusting my valve and changing the gaskets. First bolt I start to unscrew turn too easily. After removing the cover i can see why... see picture. the cover was broken (the previous owner probably overtightened it, breaking the cover and the bolt).

Ill buy another cover, but what can I do with the part of the bolt stuck in the head? Pierce and add an helicoil? The depth and torque will change...

Any suggestion besides changing the head? Which I would like to avoid.

Thank you very much for your advice and sorry for my bad english.

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Re: Help broken valve cover bolt gl1100

Post by AZgl1800 » Sat Dec 23, 2017 3:23 pm

Beautiful girl you have there, I am sure she gives you a lot of joy.

you might try to use some solvents made to loosen stuck bolts.

some have drilled out the center of the bolt and tried to use an EzyOut to back it out.

Other has actually drilled the bolt out to the threads, and then used a thread cutter to remove the thread chips.

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Re: Help broken valve cover bolt gl1100

Post by thrasherg » Sat Dec 23, 2017 4:40 pm

Most people do not put any type of locking material on those bolts, they just screw them in until tight. It is clear that someone over tightened that bolt and it broke, you will probably find that if you can buy a small left handed drill and try to drill the remaining part out of the engine (use a slow drill speed) the broken off part might just screw itself out, otherwise I suspect an easy out would work very well.


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Re: Help broken valve cover bolt gl1100

Post by Overdog » Sat Dec 23, 2017 6:08 pm

If the PO didn't put any kind of threadlocker or anything on that bolt it may back out fairly easily if you can get a grip on it somehow....the bolts bottom out on that shoulder so the remainder might not be too tight. A left handed drill bit might spin it right out.

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Re: Help broken valve cover bolt gl1100

Post by RBGERSON » Sun Dec 24, 2017 10:16 am

won't hurt to have a set of these to get the center punch correct.. ... -3577.html


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Re: Help broken valve cover bolt gl1100

Post by jeffcosmo » Sun Dec 24, 2017 10:36 am

I weld a nut to the remainder, then back it out as if it were a bolt.

If you're close, I can do this.


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