Z1OwnersClub GB

Weve just rebuilt the top end of my Z900. [ new chain and tensioners /guides /rollers ] the cam cover won"t sit down propper, seems to be riding on top idler. do i need thinner rubber mounts on idler, ? its about 5mm high.
or have i the wrong cover, ie; off different engine ..

how have you mounted the damper rubbers? on the top roller?

tried both ways, narrow to bottom ,still fouls on cover,,

which type of tensioner gear do you have ?

this is for the z1 through to z900 a4





this is for the z1000a models

Mines is same as 1st picture, will try again tmorrow, chain seem tight, also.
as wen putting thin damper rubber on bottom. push idler down and chain is taught,,

was the cam cover a good fit before you replaced the cam chain parts?

Well " its a head off a different engine, and my old cam cover,,,

did your old head have the same type of cam chain roller on the cylinder head ?

Yes ,its the roller off that head, but my old cover,,

Any cover will fit with that early type top idler which is why they are a popular design for aftermarket replacements.
Sounds like there is something else going on .
Can you actually get the top idler to bolt down or is the chain too tight for that.
The over tight cam chain could be due to it not being on the crank properly i.e to the side of the sprocket or possibly the wrong cam chain has been supplied.
You haven't fitted the tensioner first have you ? as that will have the same effect.
If the chain is so tight that the idler won't go on then then the cover won't seat fully as the cast inner ribs around the idler bulge will sit on the chain.

I have also known the cover to actually sit on the cam cap bolt heads before seating on the gasket, but it is only by half a mill or so.
This is due to some pattern gaskets being much thinner than genuine and some relief work on the inside of the cover with a die grinder or spot facer is needed.

zed1015 wrote:Sounds like there is something else going on .
.

Your right . we turned engine by hand, and was tight, then came round, and low and behold" a piece of old guide[ the long front one] was jammed in cam chan,
When we took barrels of last year, this guide was missing, appart from the screw and fixing part, now about to drain and flush,,,
Tensioner fits down now , cover on,,
Gonna drop sump filter etc ,to see if more in there,,

THanks for iliminating things ,,,