Yep - that's where the leak was coming from - the oil pressure switch.  It
was leaking oil badly enough that it was picking up some water that I
spilled on the block during the coolant drain and fill extravaganza - so it
looked like water.  It's oil upon closer investigation.

So - from what I can tell - that thing has an o-ring - or maybe I'm better
off replacing the whole switch (maybe it's cracked or something) - any
thoughts on replacing the sealer (o-ring) vs. replacing the whole switch?

eternally grateful,

Mark
1990 Westy 2.1

On Sun, Jul 26, 2009 at 10:36 PM, Mark Brush <mbrush@gmail.com> wrote:

> Yeah, that's the one.  Could mine be leaking coolant/water?  The leak must
> be coming from somewhere else...
>
> On Sun, Jul 26, 2009 at 10:00 PM, Scott Daniel - Turbovans <
> scottdaniel@turbovans.com> wrote:
>
>> 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!)
>>>
>>
>>
>