Date: Wed, 9 Jan 2002 10:13:11 -0500
Reply-To: Robert Donalds <bostneng@FCL-US.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Robert Donalds <bostneng@FCL-US.NET>
Subject: Re: clarify .006 on lifters
Content-Type: text/plain; charset="iso-8859-1"
Walt
I would start with an inspection of the the rockers arms when the engine is
cold looking for broken wave washers and to see that the clip are in place.
next I would look to see which valves are fully open and make a note Its
common for the lifters that have been holding the valves open to be soft if
the van has sat for a few days its common for the #2 ex valve to be one of
the valves that remains open and is often the one that makes the ticking.
next I would turn the engine by hand to tdc # 1 (that where I always start
when I am looking at the valve train otherwise I tend forget where I
started) and pry on the rocker to check for soft lifters. you can spend a
lot of time fooling around with preloading the good ones and checking the
soft ones to see if its time to preload or you can set them to 006ths cold
and forget it for a while. If the noise of the 006ths clearance gets to you
then you could adjust the the valves hot and go to 000 clearance as Adam
said worked for him. I like to see that the push rod can spin when I get the
clearance this close that way I am sure there is no preload
Bob Donalds
http://www.bostonengine.com
as always
all rights reserved
----- Original Message -----
From: "Walt Spak" <wnsopc3@3rdm.net>
To: "Robert Donalds" <bostneng@FCL-US.NET>; <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, January 09, 2002 8:46 AM
Subject: Re: Re: clarify .006 on lifters
> Bob,
>
> All of this valve adjusting procedures talk can be confusing. When I
> installed your rebuilt engine, I adjusted the valves as per your
> instructions. This predated the .006 clearance theory. I believe you had
> me set them at 1/2 turn preload. In any case, it worked just fine. The
> valves were always quiet. I now have about 45,000 miles on this engine
and
> for the last few thousand miles the valves are noisy on start up. Not all
> of them of course, but certainly one or maybe two are. What can I do?
> Should I set them all at .006 clearance, let them pump up & then set them
at
> zero lash?
>
> Walt Spak
> Pittsburgh, PA.
> wnsopc3@3rdm.net
>
> ----- Original Message -----
> From: Robert Donalds <bostneng@FCL-US.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, January 09, 2002 8:14 AM
> Subject: Re: clarify .006 on lifters
>
>
> Myron
> I am not sure you need to do anything to the valve adjusters on a good
> running engine. if it ant broke don't fix it. my recommendations are for
> engine that have been taken apart for what ever reason or for engines that
> have symptoms. The newest Bentley book says preloading is optional. this
is
> because of the problems that can go along with it. lifters with air in
them
> can hold the valves open when the engine warms up, lower the manifold
vacuum
> at idle and shorten valve and valve guide life
> B.Bob
>
>
>
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