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Re: Valve job and Cam Complications

To: healeybn7@aol.com, sebring@illawarra.hotkey.net.au,
Subject: Re: Valve job and Cam Complications
From: Robert Blair <rnbmail@yahoo.com>
Date: Sun, 13 May 2007 11:58:31 -0700 (PDT)
> Guys, Pls keep us posted on your findings and
progress....

Robert.

>  
> I just discovered the same on my followers yesterday
> when I removed them from my 3000 head.  Some were
> fine, others pitted.  A couple badly pitted.  I was
> wondering over night if perhaps it was tied to
> either exhaust or inlet valves, or was just random. 
> Haven't checked that out yet this morning (I
> numbered them all when they came out).  I am now
> worried that the cam lobes are likewise worn, and I
> need to go check.
> Is there a tendency for exhaust valve cam lobes and
> followers to wear faster than inlet?  Or vise versa?
>  Or, should there be even wear - to no wear?  Nice
> and smooth.  Within some mileage expectation.  
> Don't know how many miles are on the engine as the
> car is somewhat new to me.  But, it is not more than
> about 30k miles since the last rebuilt so the wear
> seems a bit unusual.  Unless, as you mention, the
> cam was badly ground.  
> In any event, I have new followers and a new cam
> sitting on the bench, so away I go.
>  
> Regards,
> Dave
>  
>  
> -----Original Message-----
> From: sebring@illawarra.hotkey.net.au
> To: healeys@autox.team.net
> Sent: Sun, 13 May 2007 4:11 AM
> Subject: Valve job and Cam Complications
> 
> 
> I was forced to remove my 3000 head due to a blown
> head gasket.
> While it was off I set up a dial indicator on top of
> a pushrod and for 
> each lobe I set it at the zero lift or lowest
> position. I rotated the 
> crank and cam and measured the actual lift of each
> lobe.
> The result was quite a variation at each lobe which
> I read as uneven 
> wear on each one.
> I then pulled the followers and discovered some were
> heavily pitted.
> All of the above made me believe the non-standard
> cam had been badly 
> ground or unacceptably worn or both.
> Net result a fresh cam grind on a spare stock cam,
> new followers and 
> finally a new head gasket .
> At the moment it is all disassembled in the garage
> (shop)
> Regards
> Joe


                        Robert - Yellow 65BJ8
rnbmail@yahoo.com 
Cell: 408-221-5244

   

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