I would agree with Greg.
I had the same questions about using the old rocker arms. I came away
with the understanding that the curve/contour on the rocker arm pad
where it contacts the the valve is critical, and that it is very
difficult to impossible for a machine shop to duplicate. The best
alternative in my mind was to buy new rockers arms.
Don Malling
Greg Dito wrote:
> 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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