Posted by Pete F on 12/4/2009, 6:48 pm, in reply to "Re: Pete Finn"
86.157.42.227
Jeff,
Just read your message again......and realised you have said valves are STICKING and NOT bent.......sorry.
If valves are sticking, it can only be guides are not good due to seizure or lack of oil for some reason. Also suspect valve springs, as they should have enough tension to prevent sticking.
Remove valves and inspect stems for wear or damage and inspect guides.
You may well need to replace guides and valves if below service limits, which are detailed in K Manual.
Check valve seats too, as if the valves have not been closing, the seats will have been getting hot and burned, which could be reason for no compression too.
Basically you need a full head strip & rebuild.
Pete F
Up North
--Previous Message--
: Jeff,
:
: Sounds like your CAMCHAIN TENSIONER has
: failed and allowed the camchain to jump the
: cam sprockets......allowing your valve
: timing to go all to hell, or someone did not
: put the cams back into the head correctly.
:
: You will need to find 6 replacement
: valves....I suggest new.....and grind them
: into the existing seats.
:
: I would then definitly buy a ZZR1100
: Camchain Tensioner before rebuilding and use
: that.
:
: The only other damage you could have done is
: to the CROWN of your pistons. Look at all of
: these with a magnifying glass for holes or
: scars, as these will get white hot when
: running and cause a siezure. The piston
: crowns must be very smooth and undamaged.
: Depending on the speed you were doing when
: the damage occured, you may have damaged a
: small end or bent a conrod. The only way to
: check this is visibly, so it would mean
: cylinder block removal too.
:
: Also check the area where the valves
: contacted the heads surface itself, as if
: thats scarred, you need a replacement head.
:
: Hope that helps ?
:
: Pete F
: Up North
:
:
:
: --Previous Message--
: Hi Pete, took head off a z1300 engine as it
: was reading 0 comp on all 6, found all 6 ex
: valves & 1 in valve sticking, what cause
: this & how do i sort it, should i be
: looking at anything else. regards Jeff
:
:
:
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