Cylinder Head Swap

[xs650special]

Well I put a big hole in my cylinder head and its time to swap it out for another one. Here's some pics of the grand canyon residing under my cam. I know I gotta switch out the valves, valve springs, and ? I want to know if there are any more pieces that need to be switch over? I do know that the valves have to be lapped.

 

[hmusket]

The cylinder head halves are machined together and should be bought as a matching pair, identified by matching numbers on the front of both halves.

 

[Reid]

How did you do that!?

 

[hotdog]

repahsed cam come apart...??? or did it drop a rocker...??

 

[xs650special]

Um I did a valve adjustment job n didnt use a torque wrench to tighten the lock nuts down.

 

[xs650special]

what did all that damage was the tappet that makes contact with the valve from the rocker. So hmusket if I get a head and cover, would it be possible to use the rockers that I already have?

 

[Reid]

I would just use all of the new stuff after a valve job, guide check, and surface

 

[xs650special]

so far the only head/cover ive found does come with anything. someone on this site offered it for free but maybe if i could find a complete unit for sale that'd be the way i'd go.

 

[Reid]

Well $0 is the magic number just make sure that your rockers and shafts dont have any damage. If any of them are you might be better off getting a complete set

 

[xs650special]

i meant the one ive found does not come with anything except the valve sleeves

 

[scabber]

I would get one complete rockers valves matched set. Head and rocker box matching numbers. Is the way to go. Post a want add in the classified.

 

[xs650special]

here's what did the damage

 

[scabber]

I would also consider fixing and use the one you have. JB weld the pieces back Problem solved. Right now you have a big oil leak in the oil return area. Cheap fix should work.

 

[xs650special]

C i def thought of that. I was thinking of getting it tig welded but i couldnt get a clear answer from anyone whether or not it could be done.

 

[scabber]

Tig welding an oily casting would be another way if you can find a welder to do it. JB weld another. Or replace it all. Your choice.

 

[xs650special]

well i do have a question: is a set from a '79 interchangeable with mine, an '81. i'm pretty sure that the '79 has points n the '80s up have TCI.

 

[rebel542]

That thing had to be raising holy hell !!!!! Forget the Tig welding. Forget the JB Weld. Replace the head assembly, upper and lower as they are matched machined sets. And get one with all the parts. Good luck.

 

[rebel542]

79 will work fine.

 

[daroberts3]

Um I did a valve adjustment job n didnt use a torque wrench to tighten the lock nuts down.

So, what is the torque spec?

 

[Punkskalar]

haha - seen that a few times with "locked down" engines that have come through here. I always wonder how they didn't hear the valves being that noisy from being soo loose before it got to that point.

I've tig'd those OK, some blowouts and holes. Then I smooth over with JB weld... Works just fine...