Stripped Camshaft Cap Bolt - ZX6R Forum
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post #1 of 10 Old 03-27-2017, 08:54 AM Thread Starter
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Stripped Camshaft Cap Bolt

2009-2012 Zx6r: I was in the middle of my valve adjustment and I already did my measurements so it was time to remove the camshaft and chain to put new shims in. There are 20 bolts total which all removed just fine (in the order that that manual explains since the camshaft is under pressure) except the very top right cam cap bolt. It's completely stripped. Here are the things I've tried:
Allen key
Star key (Torx)
Dremel or rotary tool
Flat head
Heat Gun
Chisel it loose
sockets
impact gun extension

I can't really use a drill or impact gun since the frame is in the way. At this point I am currently waiting on the JB Weld and bolt to dry to break it loose. Should I use a impact gun extension for force or should I do it slowly with a socket attachment? It's only 106in lb (I think I'll check later) so I don't understand why it's so stuck! I've put all the cam caps back on the engine to relieve the pressure so I can just focus on that bolt. I'm basically At the point where if this doesn't work then I'll have to drop the engine to re-thread it and Heli Coil it. Any suggestions?
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post #2 of 10 Old 03-27-2017, 09:11 AM
ely
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Craftsman makes a set of nut extracters they have saved my ass a time or two if the jb don't work give them a shot
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post #3 of 10 Old 03-27-2017, 09:17 AM
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Weld a nut to it.
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post #4 of 10 Old 03-27-2017, 09:41 AM
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If you can clamp on a set of vice grips, and turn that to break the bolt free, you may be able to get the leverage you need.

I too would try and use an extractor, before I would do any welding......running current through the block may come back to haunt you if you don't unplug the ECU, etc.

Destructive stuff is less appealing, because of the chance of dumping some metal filings into the top end of the motor.

If you have to cut the head off the bolt, then pull the cap, then use a vise grip to rotate the exposed shaft to get it out of the block -- you would be adding some filings at that point....

"Basic stuff fellas. Use your head for something other than to break your next fall."

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post #5 of 10 Old 03-27-2017, 10:12 AM Thread Starter
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Quote:
Originally Posted by ely View Post
Craftsman makes a set of nut extracters they have saved my ass a time or two if the jb don't work give them a shot
It was originally a Allen key nut and not a bolt will those still grip on?
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post #6 of 10 Old 03-27-2017, 10:57 AM
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Hammer it on if you have too. I've had great luck with these.
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post #7 of 10 Old 03-27-2017, 11:50 AM
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A chisel and hammer should get it to spin the 1/8th turn you need for it to break loose, then almost anything will spin it out

good to see you covered everything up you could

otherwise just pull the engine out and drill---you have already surely spent as much time as that would take with zero results to show for it.
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Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
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post #8 of 10 Old 03-27-2017, 03:50 PM
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Quote:
Originally Posted by RJ2112 View Post
If you can clamp on a set of vice grips, and turn that to break the bolt free, you may be able to get the leverage you need.

I too would try and use an extractor, before I would do any welding......running current through the block may come back to haunt you if you don't unplug the ECU, etc.

Destructive stuff is less appealing, because of the chance of dumping some metal filings into the top end of the motor.

If you have to cut the head off the bolt, then pull the cap, then use a vise grip to rotate the exposed shaft to get it out of the block -- you would be adding some filings at that point....
+1 on the vice grips if you can get them to clamp on there (it looks like there's enough of the bolt to grab on to).

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post #9 of 10 Old 04-05-2017, 08:57 PM
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@ChandlerO was it fixed?

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post #10 of 10 Old 04-05-2017, 09:24 PM Thread Starter
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Got the bugger out!

I hit it with a chisel at the bottom of the nut the did a few hard hits to break it loose. I was very happy that day lol
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