Date: Wed, 12 Jul 2006 09:54:53 -0700
Reply-To: John Lane <westy_cruisin@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Lane <westy_cruisin@YAHOO.COM>
Subject: Re: Loud metallic knock from engine??????
In-Reply-To: <7.0.1.0.0.20060712184241.01bb9e38@zorck.dk>
Content-Type: text/plain; charset=us-ascii
Well, mine sounded pretty loud.....louder than what I thought a lifter should....if it's coming from the head, I would think it's in the valve train. You can easily pop the cover to see if a spring has broken. As a precaution I replaced my lifter, easy enough job....got all I needed at Bus Depot. The collapsible push rid tube worked wonders and no leaks. What I found is if I don't run her every other day, she can make the noise and sometimes takes a while to go away. The Restore works wonders. Even with a broken spring there would be no 'tension' on the valve train and it might not make any noise at all. I would pop the cover, wiggle the rocker arms...pushing in on the valve...if it pushes in....it's the lifter. There should be no play except for the tolerance between the rocker and the push rod. I replaced my lifter and the problem came back only once. My guess is the hydraulic lock is lost, but after running for a bit...the lifter refills and all is well again.
----- Original Message ----
From: Jens Jakob Andersen <jayjay@ZORCK.DK>
To: vanagon@GERRY.VANAGON.COM
Sent: Wednesday, July 12, 2006 11:44:14 AM
Subject: Re: Loud metallic knock from engine??????
Hi John
It doesnt sound like the normal valve-clatter.
It sounds likesomeone tapping onthe head with a spanner.
I listened with the extensionset from the socketkeys, and it comes
from the rear exhaustvalvearea, righthandside.
Either it is a valve that hangs (broken valvespring?) I guess, or a lifter.
Any ideas on diagnose?
/JJ
At 18:22 12-07-2006, John Lane wrote:
>Both mine and a friends Westy had a 'knock'...if it sounds like a
>lifter, change the oil filter to a VW one and pour a can of Restore
>in....works for us.
>
>----- Original Message ----
>From: Jens Jakob Andersen <jayjay@ZORCK.DK>
>To: vanagon@GERRY.VANAGON.COM
>Sent: Wednesday, July 12, 2006 11:09:19 AM
>Subject: Loud metallic knock from engine??????
>
>Hi,
>
>Now I got the van started.
>
>And I have a loud metallic knock fromthe engine, righthand side.
>
>Sound to me like a stuck hydraulic lifter, or a stuck valve..............
>
>Any good suggestions on a quick diagnosis and fix?
>
>It is not just the normal valve clatter when cold - it is a
>distingtive metallic KNOCK KNOCK KNOCK.
>
>SIGH!!!!!!!!!!
>
>Jens Jakob
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