Date: Thu, 21 Jun 2001 09:30:04 -0500
Reply-To: wilden1@JUNO.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1@JUNO.COM>
Subject: Re: How tight is too tight, new TypeIV starting
Content-Type: text/plain
The information I posted below is what I got from Bob.
In effect he said "Follow the instructions.... stupid!"
I already followed the instructions.... I was just wanting to know why
other people think that 1.5 turns is sufficient.
Does the 1.5 turns produce less manifold vacuum?
I appreciate all the help I get from the list but I still haven't gotten
any argument that tells me that 1.5 turns is better than the 2.0 turns
recommended. As I stated before I've always used the 2 turn setting.
I started my new engine with 1.5 turns, it seemed practical to lessen the
loading on the new valve train while performing the initial run-in on the
engine.
I've since reset all lifters to the recommended two turns.
In the past I've always used a dowel with a four penny finishing nail in
the end of it to bleed the valves in the engine, (after they've pumped up
in a warm engine) I've never experienced the air lock to my knowledge.
All the lifters seem to quieten very quickly and none seem to delay in
pumping up each morning. I can see that unless the valve is bled
completely submerged in oil and pre loaded that some air could still
exist in the lifter.
If there is air trapped in the lifter does it cause the valve to burn,
seats to overheat and drop, just noisy or what?
I'm not a person without engine rebuilding experience, in 1960 we were
converting 40CI Crosley engines to Mini_Hemis, bevel cutting compression
rings, hand filing rings for step lock, turning our own teflon buttons
for wrist pins, cutting valves seats with a step in them in to keep them
in AlfaRamero heads so we could turn them 10,000 rpms, converting engines
to dry sump systems, preasurizing fuel tanks rather than using fuel
pumps.
So my real question is; If this problem has existed for 20+ years, why
hasn't someone come up with a simple fix?
Stan Wilder 83 Westfalia Air Cooled
Bob' reply.
"Stan
I posted this Sunday
Fellow Vanagon types
I have been reading the posts on adjusting lifters with interest, as I am
currently putting together an article on my experience with vanagon
hydraulic
lifters.
The vanagon book published by Bentley is about to be reprinted. For
years,
Bentley Publishing has worked hard to review comments from the those that
have taken the time to write or phone things in that they felt needed to
be
corrected or clarified every time the book is reprinted. The next
printing
will include some 50 changes. One of these changes will be about bleeding
and adjusting the hydraulic lifters. There were 2 versions of how to
bleed the
air out of the hydraulic lifter before installation. They where on pages
15.7 and
15.24. both where confusing and vague. Bentley also has in the vanagon CD
released last year added what they call an “editors note”. This note
says, in part
That there is a problem with hydraulic lifters becoming air bound and
that preloading
Hydraulic valves should be considered optional This editors note will
also be in the
newest printing of the big green book.
With the help of Erin at AVP, plus the constant feed back from my
customers and the nice people of this list, I have come up with a simple
method for removing all the air from the Hydraulic lifters prior to
installation. This method does not solve or prevent the lifters from
pulling in air after the engine has been sitting and it is not a solution
for air
bound lifters that DO expand when the engine heats up. Air bound lifters
DO hold the
valves when the engine warms up.
The 006.ths clearance cold is needed when air is present in the lifters 0
lash will not do. The most common symptoms of air bound lifters are poor
performance running rich and low manifold vacuum.
It has been my observations that preloading properly bled lifters will
self adjust in as
little as 10 minutes.
It has been my experience air bound lifters will NEVER self adjust when
preloaded
or bleed because of the air that is trapped above the check valve.
The extent of the problem varies widely. I know there will be those that
disagree with me. My completed article will be posted on my web site in
the very near future.
Bob Donalds
http://www.bostonengine.com"
On Wed, 20 Jun 2001 21:26:41 EDT Wolfvan88@aol.com writes:
> I would go by what B. Bob recommends, due to his extensive work with
> the
> problem.
>
> I had spongy lifters on my 2.1L and after following his procedure
> that went
> away.
>
> I think that at 1.5 turns that they are OK. You can do a
> compression check
> after you get some more miles on the engine.
>
> Robert
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