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GS Cam Half Moons

  • Thread starter Thread starter wdavie
  • Start date Start date
W

wdavie

Guest
Quick question why did Suzuki cast the cylinder head with the rubber half moons, what is the purpose of the little buggers cause all mine seem to do is weep oil!!
 
Those cut-outs are so that they could align-bore the cam bearing surfaces.

Daniel
 
The head and cam caps were milled from the side as a single piece. The half-circle is where they milled it. Use threebond to stick the half-moons onto the head, and put them in backwards (i.e., with the lip on the inside). This keeps them from popping out and may also help with cam side float.
 
Wow that was quick. Cheers guys I've put the engine back together now and apart from one weep from the front half moon things seem ok, will turn them around at next clearance check.Did notice that the moon that leaks was an old one I'd put back in by mistake.:oops: Oh well you live and learn.
 
The half moons should be glued into the engine on the curved section. This is well covered in the archives. Threebond 1194 is the product of choice for applications like this. Do this and you won't have any more leaks.
 
I also add a dab of three bond on the tops where the gasket contacts them.. just for the little extra piece of mind.
 
Just use some RTV on the outside of the Half Moons.....problem solved.

I installed new moons, and still RTV'ed mine....just incase.
 
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