I'm assuming you are referring to a motor with hydraulic lifters?  If so,
the procedure is: first get the cylinder to top dead center, back the
adjusting screws completely off the valve stems, turn them back in just
until they touch the valve stem, then go two (2) turns in further.  At least
that is what Bentley says...

Bill Knight
Raleigh, NC

-----Original Message-----
From: Aaron Robinson <arobinso@WSUNIX.WSU.EDU>
To: Vanagon@VANAGON.COM <Vanagon@VANAGON.COM>
Date: Monday, March 16, 1998 1:16 PM
Subject: how tight on pushrods?

>Hey, I tightened up my head bolts a while back and had to take the rocker
>arms off and everything. I was just wondering what the correct thinking
>was to tighten up the adjusting screws for the pushrods.
>
>What I did, was wait until the rocker arm had pushed the pushrod all the
>way down, then turn the adjusting screw until it was tight, then 1/4 to
>1/2 a turn extra. Is this right? I just don't know how tight I should go
>and don't want to go too loose either.
>
>What happens if they're too tight? How about too loose?
>
>Please reply to me personally since I get the digest.
>thanks
>
>Aaron
>
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