Date: Fri, 10 Feb 2017 01:18:45 +0000
Reply-To: David <fjazzbass@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David <fjazzbass@GMAIL.COM>
Subject: Re: The root of all bubbles,
low compression and evil itself? 1.9 head off...
In-Reply-To: <CY1PR20MB00298CCB59558231DF2D7F46A0450@CY1PR20MB0029.namprd20.prod.outlook.com>
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Hi Dennis, all...
After a quick cleaning of the head, a tiny crack on the inside of the
shoulder- perpendicular to the primary surface, but along the inside of
where the cylinder slides in....
Also, these were reman heads... it was apparent where repair had been made
in between the valves- not so much sloppy, but yeah- not what I would have
liked to see.
So I'm thinking of replacing it with new- debating doing the other
side....
https://drive.google.com/open?id=0B15gAxRzC2oqRGRkVTBQa0dudEk
Here's a link to a picture of the crack in the lower left side....
Thanks for all the advice!!!
Dave
On Thu, Feb 9, 2017 at 5:24 PM Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> Head gasket (combustion) failures are a symptom. Usually they are the
> result of a fitment problem or the heads came loose. Maybe not really loose
> but for some reason the head studs failed to maintain adequate tension on
> the heads due to combustion pressures or the thermal cycles.
>
> In order for the system to seal properly both the cylinder tops and the
> head seats need to be near perfect. The cylinders also need to be perfectly
> paralleled and in plane with the adjacent one. The cases can warp or twist
> and the cylinder bases can get damaged making this impossible. Rare for the
> Waterboxer but very common for the air cooled engines.
>
> You need to look at everything including the possibility the studs are no
> good and need to be replaced. Before final assembly test fit a head and
> make sure all the studs/nuts can torque up. Any that seem to keep
> stretching need to be replaced.
>
> Some pictures am allow us to give some better answers. You can do this
> right or you will get to do it again and curse out the Water Boxer.
>
> Dennis
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of Dave Bohannan
> Sent: Tuesday, February 07, 2017 1:05 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: The root of all bubbles, low compression and evil itself? 1.9
> head off...
>
> Smart volks…
>
> I finally got sick of bleeding “air” from the coolant system and suspected
> something was up…compression test looked great on 3, bad on one… took head
> off and lo and behold, yep I’ve got blown head gasket that allowed
> combustion gases into coolant…
>
> So, I’ve looked at the outside of the cylinder sleeve and it looks
> corroded- but the actual head itself doesn’t…do I need to “re-sleeve” it?
>
> In the least I think I need a new head? The “gasket rings” looked
> good…just discoloration around the outside on the head which showed where
> combustion gases were coming out...
>
> I don’t know the right questions to ask here…anyone???
>
> Dave
> 1.9 GL (half headless….)
>
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