Author Topic: CB550 cylinder head  (Read 277 times)

Offline heliwilly

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CB550 cylinder head
« on: October 12, 2018, 10:43:24 AM »
I have been keeping all the cylinder head nuts constantly wet with penetrating fluid, since I got the bike a couple of weeks ago, as they all looked dry and rusty.
 
There seems to be a problem with one of the nuts, as a normal 12mm socket didn't grip the nut and an 11mm is too small.

A closer inspection  revealed that the nut is rounded off, as the 12mm socked just spins on the nut whether trying to tighten or loosen it.

Apart from carefully drilling off the nut, are there any other methods people have successfully tried to remove stuck nuts???

All the other nuts have loosened off OK. TIA Bill W

Online Woodside

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Re: CB550 cylinder head
« Reply #1 on: October 12, 2018, 10:51:20 AM »
I have a set of sockets here that are for exactly that purpose..they kinda  cam onto the rounded nut/bolt...never failed yet..even used them on stuck rounded sprocket bolts last night ...
Might be a sealey  product but can't remember

Offline Bryanj

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Re: CB550 cylinder head
« Reply #2 on: October 12, 2018, 11:27:12 AM »
6 sided sockets work better and also a whitworth socket(cant remember 3/16 or 1/4) is a "hammer fit" on a worn 12mm, used to use one all the time on rounded filter bolts

Offline heliwilly

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Re: CB550 cylinder head
« Reply #3 on: October 12, 2018, 01:32:14 PM »
Woodside,
If you could come up ith a brand name I would appreciate it. Trouble is the nuts are at the bottom of a hole 50mm deep x 18mm diameter. probably need a slimline extractor? Thanks Bill W.

Offline Trigger

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Re: CB550 cylinder head
« Reply #4 on: October 12, 2018, 01:55:12 PM »
Weld a bolt to the stud or drill  ;)

Offline matthewmosse

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Re: CB550 cylinder head
« Reply #5 on: October 12, 2018, 02:03:02 PM »
I had same issue on a cb550 engine or 2, on one I carefully located the stud between the fins, cut it with a hacksaw, the next time I had a spare 12mm thinwall socket that had split and I put that on then put a stick welder onto the job, to join the dead socket and bolt - advantage of the stick welder being it fitted down the hole - or might have been through the fins and could get a decent weld on there, the heat helps crack the rust too. A far better solution than cutting the stud as new studs are hard to get these days.
Got a 500/4 with rust and a sidecar and loadsa bits. nice and original and been round the clock

Offline Seabeowner

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Re: CB550 cylinder head
« Reply #6 on: October 12, 2018, 02:50:51 PM »
6 sided sockets work better and also a whitworth socket(cant remember 3/16 or 1/4) is a "hammer fit" on a worn 12mm, used to use one all the time on rounded filter bolts
That would be my first try. 12 point sockets and spanners play havoc with rusty Hondas.
Phil
1971  CB500K0
1973  CB500K1
1975  CB550F1
1978  CB550K


Offline ka-ja

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Re: CB550 cylinder head
« Reply #8 on: October 12, 2018, 07:50:45 PM »
The sockets for rounded nuts are called "metrinch" sockets, they grip the hut flats instead of the points  https://www.ebay.co.uk/sch/i.html?_nkw=metrinch+sockets, I have a set in my garage, just across the bridge from Hull
nice bike,nothing in the bank

Online Oddjob

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Re: CB550 cylinder head
« Reply #9 on: October 12, 2018, 09:52:25 PM »
I have loads of spare studs, if you can cut it then do so as it will be far easier in the end. If you need a stud you can have one FOC.
Don't play stupid with me, I'm better at it

Offline heliwilly

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Re: CB550 cylinder head
« Reply #10 on: October 13, 2018, 09:29:29 AM »
Thanks for all the advice.
I will try with some extractors first, and if it doesn't work, I may ask Oddjob for a stud, if I can hacksaw the stud or if I damage it drilling off the nut.
I like the idea of welding another nut on top, but have no welder. I'll let you know how I get on.
First job is to fit a new brake master cylinder to my elderly Jag X300.
Cheers Bill W.

Online K2-K6

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Re: CB550 cylinder head
« Reply #11 on: October 13, 2018, 09:53:28 AM »
I have a set of sockets here that are for exactly that purpose..they kinda  cam onto the rounded nut/bolt...never failed yet..even used them on stuck rounded sprocket bolts last night ...
Might be a sealey  product but can't remember

I've not seen those before,  they seem really useful. I'll add them to my shopping list.

Bill, that Jaguar X300 I think is one of the best looking cars they've ever made. Which engine do you have?

Offline SteveD CB500K0

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Re: CB550 cylinder head
« Reply #12 on: October 13, 2018, 10:29:12 AM »
I had one of them too!

Mine was an R-plate 3.2 V8.  I did about 120k in the eight years that I owned it and then traded it for an SLK for my wife as a silver wedding present.

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Maybe I should start a new thread "Cars you have owned and loved" ?
2015 Tiger 800 XRT
1971 CB500K0

Offline heliwilly

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Re: CB550 cylinder head
« Reply #13 on: October 13, 2018, 10:24:15 PM »
K2-K6, SteveD CB500K0.

I have had a succession of old jags since I retired 15 yrs ago. Latest is a 1 of 33 manufactured  1995 Jaguar X330 4.0 litre straight 6 engine, it is a very rare 4 - seat LWB version of the standard X300. Getting too old to be crawling around under them. Even get knackered taking a wheel off to do the pads, they are a weight to get back on. I'll get it sorted, through an MOT and sell it
« Last Edit: October 13, 2018, 10:29:27 PM by heliwilly »