Broken Cam Bolt

More
28 Oct 2005 08:57 #4910 by Neotrion
Broken Cam Bolt was created by Neotrion
I was re-adjusting some of my valve clearances, and I ended up breaking one of the cam bolts off into the block. I was using the right tork according to specs, but I guess it was just weak. I was wondering if there was some good advice on how to get it out, ie products I could use or something I could do. I am also curious on what the torque is on your cam covers for an 81 750. I know the wrench is good, so I think the bolt was just weak. On another side, does anyone know where I can get or trade in shims for my valves? I haven't quite solved the original problem with my bike, but I wanted to fix the clearance on my valves. I put some new springs in, and it seems to have messed with the clearance. I would be happy to trade shims with someone if they have any extra.

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 10:21 #4926 by ~DW~
Replied by ~DW~ on topic Broken Cam Bolt
I think you mean the cam-cap bolts, the ones that hold the cam-cap/cam down to the head ?
These bolts are steel and your head is alum. I would have thought that the bolt would strip out the hole/port before it would break off but if thats the case ?
Can you get at the bolt at all ? or, is it flush with the broken bolt top surface? can you get a drill on it? If you can't you will probably have to pull the head. If you can go and buy an "EZ-OUT" (try NAPA)..take a good bolt in with you and show em what you have, than get a drill bit for your e-z out,they may have the proper one. The instructions that come with the Ez-out will tell you what size. Carefully drill (pre-punch) the broken bolt deep enough that the ez-out will "bite in"..take your time and you will get it. probably have to re-thread the port after your done.
Good Luck &
Go slow.
;)

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 10:26 #4928 by John68
Replied by John68 on topic Broken Cam Bolt
if you are drilling out the bolt, which you'll probably have to do, keep a strong magent close to the bolt, while drilling. Kawasaki generally frowns upon metal shavings inside the engine.

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 10:33 #4930 by Wolfman@SparksAmerica
Replied by Wolfman@SparksAmerica on topic Broken Cam Bolt
If you have enough room to get a drill in there to drill a hole, you might just try a left hand drill bit. I may bite just enough to back the broken bolt out of the hole if not you can still use an ez-out on it. just my 2 cents.

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 11:34 #4950 by RonKZ650
Replied by RonKZ650 on topic Broken Cam Bolt
I don't have manual here, but torque is somewhere around 8 ft/lbs if memory serves me. How in this world can a bolt break at 8 ft/lbs is beyond me. The good thing is the bolt is in a well oiled cylinder head and not seized in the head. It should thread right back out with even the slightest twist. Probably just get a sharp pick or something and try to work it out. Don't overtighten these caps. They'll strip the aluminum at 8 ft/lbs. I'd recommend more like 6 ft/lb.

321,000 miles on KZ's that I can remember. Not going to see any more.

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 11:43 #4954 by Neotrion
Replied by Neotrion on topic Broken Cam Bolt
Thanks for the advice so far. So far there is no way to get plyers or anything down to it. It looks like it broke pretty even with the hole. Any advice on the shims?

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 11:53 #4956 by OKC_Kent
Replied by OKC_Kent on topic Broken Cam Bolt
Once you know what size shim(s) you need check with a dealer. If they can't help then post here, someone may have what you need. I think Z1 Enterprises has shims, call them too.

Oklahoma City, OK
78 KZ650 B2 82,000+ miles

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 19:37 #5056 by bluegill
Replied by bluegill on topic Broken Cam Bolt
I had the same experience, as have several others. I got it out with an easy out, basically a reverse threaded bit. Here's my post from then...
kzrider.com/forum/viewthread.php?tid=21457

As for getting a new bolt...

Jeff Saunders graciously told me about fastenal.com when I asked him about replacing those bolts on my 750E1. I also broke one off but was able to get it out with an easy out. Fastenal had all 16 bolts for about a dime each.

Please Log in or Create an account to join the conversation.

More
28 Oct 2005 20:46 #5065 by ~DW~
Replied by ~DW~ on topic Broken Cam Bolt
Wondering if these bolts break (on removal) because red lock-tite was used ? For the next guys sake, don't use red lock-tight on em, blue is ok tho.

The posts in this thread will also help.

kzrider.com/component/option,com_joomlab...iew/id,2609/catid,2/

Please Log in or Create an account to join the conversation.

  • Duck
  • Offline
  • User
  • e vica na i sau na ga
More
29 Oct 2005 01:35 #5093 by Duck
Replied by Duck on topic Broken Cam Bolt
It's good to chase threads on ANY 'holes' to clear any remaining 'thread lock' before reinstalling bolts/studs/screws. First blow out with air, chase to a tad more depth than you'll need with a bottoming tap, blow out agsin. If you've not used a tap before, it's important to back it to clear chips any time it starts to bind and if it still binds, take it out and blow clear with air.

Please Log in or Create an account to join the conversation.

More
29 Oct 2005 08:42 #5127 by masospaghetti
Replied by masospaghetti on topic Broken Cam Bolt
I recently had to reinstall my cam caps and did not use thread lock on them...how much should I worry about this?

I torqued the bolts down to whatever the book said, i think 10 ft/lbs.

Please Log in or Create an account to join the conversation.

More
29 Oct 2005 10:02 #5139 by RonKZ650
Replied by RonKZ650 on topic Broken Cam Bolt
They weren't loctighted by the factory. They don't ever come loose, no need for loctite in my opinion.
masospaghetti wrote:

I recently had to reinstall my cam caps and did not use thread lock on them...how much should I worry about this?

I torqued the bolts down to whatever the book said, i think 10 ft/lbs.


321,000 miles on KZ's that I can remember. Not going to see any more.

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum