Sounds like you are referring to the oil pressure switch there,
between the push rod tubes .
that one ?

Scott
----- Original Message -----
From: "Mark Brush" <mbrush@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, July 26, 2009 5:52 PM
Subject: electric plug in engine block

> Hi All -
>
> What's that electric plug going into the engine block?  It's near the
> coolant drain plug on the left head.  Mine's leaking and I can't find any
> info on it in the Bentley - and I haven't found a posting on the listserve
> yet.
>
> I have a 1990 Westy 2.1 with a few leaks (btw - I just used the bong
> method
> for filling with coolant and it worked great!)