Date:         Sun, 9 Dec 2018 12:57:58 -0500
Reply-To:     jeff ensing <jeffensing@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         jeff ensing <jeffensing@GMAIL.COM>
Subject:      Re: Fuel or Electrical Part III
In-Reply-To:  <BN6PR2001MB10425914C1F503FE6472B4CBA0A40@BN6PR2001MB1042.namprd20.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"

I had an intake valve break like this.
It was indeed on an engine that had experienced the seized valve in the
guide scenario.
The heads came off to fix the seized valves and bent pushrods but the
broken keeper shoulder on the intake valve came much later in the engines
life when again, the head had to come off.
The moral of the story is I would recommend you replace all those valves
now.
Check all those pushrods for bends and damage also.

Nostalgic trivia for the old timers on the list :
This was to be my first dealings with Boston Bob. May he rest in peace.

Jeff




On Sun, Dec 9, 2018 at 9:46 AM Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> Mark,
> Yes it looks like the keeper or the top of valve stem failed. Two things
> to look for. Either the failure was due to the keeper failing, the top of
> the valve or the spring seat. It is possible the this was also caused by
> the valve sticking or seizing in the guide. This can happen from bad
> tolerances on assembly, overheating, and bad fuel. Yes, the base of the
> intake see fuel and if enough varnish builds up on the valve stem it can
> jam in the guide. This is also a cause of the famous vanagon lifter clatter
> syndrome. That is not always caused by a bad lifter. The guides get very
> little lubrication so it doesn’t take much to make them stick.
>
> Since you have two cylinders with no compression you need to look at both
> sides. After valve came loose there is a chance that there is also piston
> damage.
>
> Dennis
>
>
> From: Mark Pinnell <mark.stuart.pinnell@gmail.com>
> Sent: Friday, December 7, 2018 11:44 PM
> To: Dennis Haynes <d23haynes57@hotmail.com>
> Subject: Re: Fuel or Electrical Part III
>
> Thanks Dennis. I believe that's what my issue is.
> Mark
>
> On Fri, Dec 7, 2018, 10:13 PM Dennis Haynes <d23haynes57@hotmail.com
> <mailto:d23haynes57@hotmail.com> wrote:
> If you like you may pmail the photos to me and I'll take a look. Valve
> stem, keeper failure is fairly common especially with some new heads.
>
> Dennis
>
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com<mailto:
> vanagon@gerry.vanagon.com>> on behalf of Mark Pinnell <
> mark.stuart.pinnell@GMAIL.COM<mailto:mark.stuart.pinnell@GMAIL.COM>>
> Sent: Friday, December 7, 2018 10:32 AM
> To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
> Subject: Fuel or Electrical Part III
>
> Hi all,
> I have completed all of the electrical and fuel diagnostics as per Bentley
> and advice from this source and everything checks out OK.
> Zip tied the broken Hall sender unit to the distributor and it seems solid
> (new unit is in transit).
> Did a compression test today and have the two cylinders at the rear within
> accepted range (127 and 140), but cannot get anything on the front two
> cylinders (both read zero). I am guessing that I have found my 'issue'.
> Pulled the head cover on the passenger side and found one valve 'out of
> sorts'. Attached a photo but wouldn't load. Basically, one spring is pushed
> out and appears to be worn down between the adjuster and the valve.
> Adjuster and spring seem OK. Can forward photo to individual email
> addresses if that helps.
> Any thoughts/guidance would, once again, be appreciated. I am pretty much
> pushing my mechanical envelope at this point, but I will continue to read
> online and try what the group suggests. Baring that, it goes to a
> professional mechanic in the spring. She goes into storage today.
> Thanks in advance,
> Mark
>