Hi Joe: I believe that wear on the cam lobes or follower surfaces would
cause reduction in valve clearance, not excessive clearance.
Jim Smith
----- Original Message -----
From: <sebring@illawarra.hotkey.net.au>
To: <healeys@autox.team.net>
Sent: Friday, May 11, 2007 12:42 AM
Subject: Fwd: Re: Valve job
> Quoting BJ8Healeys <sbyers@ec.rr.com>:
>
>> Hello, Healeyphiles -
>>
>> "Seems that two rockers
>> had
>> no clearance, either."
>>
>
> Focusing on the condition above 'no clearance' would indicate to me that;
> either the valve face or valve seat face has worn, burnt or eroded and
> allowed
> the top of the stem of the valve to rise relative to the head and thus
> reduced
> the clearance OR the valve clearance was incorrectly set prior to the
> compression test??? or lock nuts did not hold, allowing the adjuster to
> move
> reducing the clearance.
>
> Wear on the cam face or the mating cam follower's face would more likely
> cause
> excessive valve clearance as the mating wear surfaces have reduced in lobe
> height or follower length.
>
> Cam followers are the weak link and care should be taken to inspect them
> regularly. I am also concerned about reusing followers that have
> been 'reconditioned' by grinding and therefore removal of some of the
> hardened
> surface. I dont know how thick the 'hard face' is, others may know better
> than
> I
>
> Joe
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