ANSWERS was RE: questions on roller rockers...attn GS

From: GS- (GSWillhite@ualr.edu)
Date: Tue Oct 26 1999 - 11:53:33 EDT


You da man Frank! I would have asked you back in July,
but I was new you were very busy. Hope things are well
with Mr.Holloway Sr.

Thanks again!

GS -

> Frank.T.Holloway@KP.ORG wrote:
> Sounds like you have a problem with one or a couple of your lifters leaking
> down. You can adjust them again, but given the fact that they get quite, I
> don't think adjustment is going to help. Your lash adjustment does sound a
> little light to me so I would try adjusting them again. All hydraulic
> lifters that I am familiar with require a pre-load of between .020 -.060
> inch. This adjustment can be performed hot or cold (it doesn't matter). I
> prefer to set lifters with the engine off because you don't need to worry
> about the oil flying all over the place. To do the adjustment, place the
> lifter that you want to adjust on the heal of the cam, back off the rocker
> so that it is loose, let it set for a couple of minutes, (lifter needs to
> extend the plunger all the way against the stop), tighten the rocker while
> spinning the pushrod, once resistance is felt, you are a zero clearance. If
> the rocker arm studs are 3/8-24, you have 24 full turns of the rocker arm
> nut to move down 1 inch, for every full turn of the nut, you will pre-load
> the lifter approx. .041 inch. ( one inch / 24 turns - inch). I try to run
> pre-load right around .040 inch so one complete turn of the nut is required
> once zero clearance is achieved. Perform the above adjustment on all
> lifters. Make sure of the thread pitch on the studs that you are running.
>
> Frank
>
> > -----Original Message-----
> > From: GS- [SMTP:GSWillhite@ualr.edu]
> > Sent: Monday, October 25, 1999 10:07 AM
> > To: dakota-truck@buffnet.net
> > Subject: DML: RE: RE: RE: : questions on roller rockers...Frank
> >
> > Frank, I've got some mild tapping on startup with the
> > Mopar roller rockers. It only happens for 2-3 seconds
> > max and all is quiet. I just wanted to ask if this is
> > normal or would you suggest I adjust for more preload?
> > The stock pressed steel rockers were quiet on startup.
> > I adjusted the MP rockers with the engine warm and
> > running with only about a 1/4 turn.
> >
> > Thanks
> >
> > GS -



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