Doug,
TR rocker arms are notorious for wear, as is the rocker shaft. At 125,000
miles both should be renewed. I'm not sure about the feasibility of
grinding rockers to the same contour but what it would cost there probably
is not much added expense in simply replacing them with new rockers.
It is recommended that the rocker shaft be replaced with a hardened, or
nitrided, shaft. These are readily available at a number of sources
although prices vary quite a bit, from about $60 to $90. If you have not
removed the rockers to inspect the shaft you definitely should. What you
find might totally convince you to replace it.
Hopefully another lister can comment on your adjusting screws. I don't
think any harm will come from mixing these up, after all what do you do when
you buy new screws, or pushrods for that matter? But I might be speaking
heresy here so a consensus from the list will give you a better idea.
Greg Dito
CD6250L
----- Original Message -----
From: "Douglas Morris" <dcmdcm@earthlink.net>
To: "6pack" <6pack@autox.team.net>
Sent: Thursday, October 09, 2003 10:09 PM
Subject: Valve Job
> In doing a 125-Kmi valve job, I replaced the exhaust valves, renewed the
> intake valves, and changed guides all around. There is some wear on the
> rocker-arm surfaces which contact the valve stems.
> -Question 1: Can I use the rocker arms as-is, even with the new valves?
> -Question 2: Can/should these surfaces be ground smooth, or will that
> compromise hardness?
>
> The adjusting screws were jostled out of their carefully arrangement in
> storage, so there's no way to match 'em with their push rods (dohhh!). I
> don't see any significant wear marks, though.
> -Question: Should I just put 'em in and hope for the best, or is there
some
> magic way of making sure there'll be no problems?
>
> DougM
> '74 CF18XXX
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