[Vwdiesel] PD Cam

[brian gochnauer]

Loren,
To speak to your point.
I bought the BEW PD Jetta with 60k on it, so I can't speak to the oil used
before I bought it but when I tore it down at 118k miles,
I found fuel in the oil is a real possibility. The PD injectors sit under
the valve cover and are bathed in oil.
There is a upper and lower o-ring seal to contain the 'charge' fuel pressure
to the injector that is run by the camshaft.
The PD injectors are held in the head with one hold down from one side which
also forces the injector away from the hold-down.
what I found is severe wear in the aluminum head from the steel o-ring lands
on the injector and exactly across from the hold-down.
Eventually this would cause the low o-ring pressure on the hold-down side
and leak fuel into the oil.
And of course you image what happens when you dilute oil with fuel.
I think the o-ring seal area should have a steel liner to protect the
vibrations of the injector from eating into the aluminum head or
a different style hold down.
Poor engineering design and quite easily diagnosed if they had done due
diligence when testing a new design for a cylinder head.

:

> Date: Sat, 24 Sep 2011 16:34:18 -0400 (EDT)
> From: LBaird119 at aol.com
> To: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] PROTHE on ebay??
> Message-ID: <dedd.26e0bf36.3baf98ca at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> I've wondered if much of the cam problems is from incorrect  oil.  Just as
> I
> figure a lot of the 5.7 GM problems were attributable to incorrect oil and
> change
> intervals, water in fuel, not changing filters, one bad battery, improperly
>  working
> lower hose coolant heaters and such.  Not ALL the problems but several
> I've
> heard of...
>     Loren
>