[DeTomaso] rocker arm alignment

[Will Kooiman]

The plates that I have used are from CompCams.  The quality was very good ­
for me.  Your mileage may vary.

From:  Justin Greisberg <justingreisberg at hotmail.com>
Date:  Wednesday, September 19, 2012 3:46 PM
To:  Will Kooiman <will.kooiman at gmail.com>, <detomaso at realbig.com>
Subject:  RE: [DeTomaso] rocker arm alignment

on my CHI heads with rocker studs and harlan sharp rocker arms, there was no
option to move the rocker arm sideways at all.  if the guideplates dont fit,
then there is no adjustment.  the guideplates themselves might need a slight
right/left adjustment on the rocker studs, before you tighten the studs.
BUT it is well known that some of the aftermarket cleveland guide plates do
not fit properly.  summit now lists a bunch of guideplates for the
cleveland, including some from AFR that I have never seen.  justin

> Date: Tue, 18 Sep 2012 22:46:38 -0500
> Subject: Re: [DeTomaso] rocker arm alignment
> From: will.kooiman at gmail.com
> To: justingreisberg at hotmail.com; detomaso at realbig.com
> 
> That looks like an adjustment problem.
> 
> If you loosen the rocker studs, you can adjust the rockers left/right by
> moving the guide plate.
> 
> I would only cut/reweld the guide plate after I've confirmed that the ones
> I had could not be adjusted.  For that matter, if it's off so bad you
> can't adjust them, I'd get another brand of guide plates.  They are pretty
> inexpensive.
> 
> Also check that the pushrods do not rub anywhere - through their full
> travel.  It is pretty common for them to bind on the rocker arms or on the
> heads themselves (the holes cut through the heads for the pushrods).
> 
> Just my opinion, but I wouldn't take it back to the builder.  This is an
> easy fix, and you'll do it better than he will - since it's your baby.
> 
> 
> 
> On 9/18/12 6:06 PM, "Justin Greisberg" <justingreisberg at hotmail.com> wrote:
> 
> >
> >Important:
> >when using pushrod guides for clevelands, I found the same thing.  I
> >think the traditional crane or comp (I forgot which) guide plates just do
> >not fit properly.  I found some other brand, I am sorry I forgot which,
> >which was much better.  I talked to some engine builders and they
> >confirmed the same thing.  I think the comp cams were not good and the
> >manleys fit well.  I see summit now sells trick flow brand as well, which
> >was not available when I built my engine.  i was using 3/8" pushrods.
> >I also found the pushrod length for CHI heads plus harland sharp roller
> >rockers was very much shorter than standard to get the rocker over the
> >center of the valve stem. an adjustable pushrod length checker was
> >essential in adjusting the valvetrain.  justin
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