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 Identifiers for early detection of tappet failure in 8V's

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Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Identifiers for early detection of tappet failure in 8V's   Wed Nov 25, 2015 3:23 pm

I'll add more pics as I get them but this one is very clear. I've posted it up very large to make it easy to see but its a perfect example of an indicator of tappet wear that can be observed without removing the cambox.

If you look at the top of the tappet closest to us in the photo you can see that its top sits about 1mm proud of the top of the cambox casting. The one furthest away is flush or maybe even slightly below flush with the cambox casting. This observation is of course undertaken with the piston at TDC compression as if you were checking the valve clearances as at this point both tappets are on the base circles of their respective cams.

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Note that while NOT seeing this sort of recession does not necessarily mean your tappets are OK if you DO see it it is a huge alarm siren that you should stop riding the bike and get the cams and tappets examined!

Pete
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Cereal KLR
Carlotto
Carlotto


Posts : 39
Join date : 2015-10-12

PostSubject: Re: Identifiers for early detection of tappet failure in 8V's   Wed Nov 25, 2015 4:03 pm

Thanks ,will pass this along right now.
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