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1970 TR6 cylinder head bolts #758260
12/05/18 9:12 pm
12/05/18 9:12 pm
Joined: Dec 2018
Posts: 3
Surrey
S
Steve Guildford Offline OP
BritBike Forum member
Steve Guildford  Offline OP
BritBike Forum member
S

Joined: Dec 2018
Posts: 3
Surrey
Hi - I'm a new user on this forum and this is probably going to sound like a silly question....I am trying to doing some work on the top end of my 1970 TR6R but I can't even get two of the central bolts (that go through the rocker covers into the cylinder head) off as the main part of the frame obstructs them. The two on the other side are fine. Is there a special way of removing these two without taking the engine out of the frame? Any suggestions appreciated!

Steve

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Re: 1970 TR6 cylinder head bolts [Re: Steve Guildford] #758284
12/05/18 10:51 pm
12/05/18 10:51 pm
Joined: Nov 2006
Posts: 254
USA, WA state
R
russrudolph Offline
BritBike Forum member
russrudolph  Offline
BritBike Forum member
R

Joined: Nov 2006
Posts: 254
USA, WA state
I have a 1970 tr6r also and had the same problem Loosened all motor mounts and engine moved to one side to loosen bolts. I believe lower engine spacers might have been left off, just a guess

Re: 1970 TR6 cylinder head bolts [Re: russrudolph] #758359
12/06/18 3:28 pm
12/06/18 3:28 pm
Joined: Dec 2018
Posts: 3
Surrey
S
Steve Guildford Offline OP
BritBike Forum member
Steve Guildford  Offline OP
BritBike Forum member
S

Joined: Dec 2018
Posts: 3
Surrey
Hi Russ, many thanks for quick response. Will check that out when I get home - it sounds plausible. I have looked on line and see that you can buy spacers so may invest in one or two of those....although not sure if that then affects the way the sprockets line up.

Re: 1970 TR6 cylinder head bolts [Re: Steve Guildford] #758368
12/06/18 4:45 pm
12/06/18 4:45 pm
Joined: Oct 2003
Posts: 3,707
Emsworth, sunny south of Engla...
D
dave jones Offline
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dave jones  Offline
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Joined: Oct 2003
Posts: 3,707
Emsworth, sunny south of Engla...
Russ is talking about the spacers under the engine that are supposed to be there. I wouldn't add any extra ones. There should be spacers on the head steady, too. I don't know if it will make a difference to whether the head bolt will pass the top tube. The spacers were missing on mine originally but to fit them I had to move the lower frame tubes out to their original distance apart to get the spacers in. When the lower mount was done up by the previous owner the tubes had bent in a bit.

I used bit of threaded bar and a couple of nuts for this when the engine was out.

My head bolts scrape by the top tube on one side as I remember but I don't think that the spacers made any difference to this. I was more concerned about the gearbox drain plug being obscured by the bent in lower tube.

I don't remember what the chain alignment was like without the spacers but with them it seems fine.

If the spacers are in place then just do what Russ said and loosen all the engine mounting bolts while you fit the head bolts and forget about it.



Dave

Last edited by dave jones; 12/06/18 4:48 pm.
Re: 1970 TR6 cylinder head bolts [Re: Steve Guildford] #758372
12/06/18 6:35 pm
12/06/18 6:35 pm
Joined: Dec 2018
Posts: 3
Surrey
S
Steve Guildford Offline OP
BritBike Forum member
Steve Guildford  Offline OP
BritBike Forum member
S

Joined: Dec 2018
Posts: 3
Surrey
Thanks Dave, really helpful. I’ll have a look to see what I’ve got and take it from there. I may be back at some point though...
Steve

Re: 1970 TR6 cylinder head bolts [Re: Steve Guildford] #758833
12/10/18 11:09 pm
12/10/18 11:09 pm
Joined: Mar 2014
Posts: 22
Dorset
C
chainreaction Offline
BritBike Forum member
chainreaction  Offline
BritBike Forum member
C

Joined: Mar 2014
Posts: 22
Dorset
This is a common problem and if you remove all the head bolts inc the smaller nuts n bolts from the r/cover you can then tilt the r/box enough to remove the offending bolts.


Moderated by  John Healy 


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