that would be interesting to find another place ( besides the pressure cap
fitting on the pressure bottle ) to tap into the cooling system so you cna
pressurize it there, thus testing the pressure bottle and pressure cap right
in place.

I see the misunderstanding........
we're talking about, or at lesat I am thinking about,  the engine, and
possibly working on it.......
and I see the words 'take out the compressor'........
which sounds to me like 'remove the compressor' ..........since I'm,
thinking about the van and engine we're dealing with here.
hence the unclarity.

I never have to 'take out my compressor' of course.........it's hooked up
full time and I just need to grab an air hose.
I do need to 'turn on my air compressor to do a leak down test' though.

----- Original Message -----
From: "John Bange" <jbange@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, February 14, 2009 4:45 PM
Subject: Re: Mocal sandwich plate plus oil cooler equals overcooling

>>>> starting with a leak down test.
>
>>> out the compressor tomorrow and have a look anyway. "
>>
>> "compressor" ???
>> what compressor ?
>
> My Hitachi air compressor... to hook up to my leakdown tester.... to
> put compressed air into the combustion chambers.... to test how well
> they hold pressure... you know, a leakdown test?
>
>> I would say an IR temp gun is mandatory to own and use if you're chasing
>> any
>> coolant or temp issues.
>
> I would have to agree.
>
>>> There was boiling upon shutoff, when the coolant stops
>>> flowing and soaks up heat from the hot metal bits.
>>
>> Of course you realize millions of cars don't do this when their coolant
>> stops circulating.
>> The temp of the coolant in the engine does  goes up some yes, for the
>> first
>> few minutes after shut down......
>> but it's normally never an issue, and 'boiling' isn't normal.
>
> Well yeah, that's why I decided to see if I couldn't get the
> temperature down a bit. I may pressure test tohe cooling system with
> the cap on, just to see what happens, but I'm fairly certain at this
> point that it's holding pressure OK.
>
>> how about this.........
>> what precisely is the coolant mixture you are using ???
>> brand , type, and water/a-frz proportion.
>> I think you said Blue Pentosin.
>
> 50-50 blue pentosin and distilled water, changed yearly.
>
> --
> John Bange
> '90 Vanagon - "Lastwagen"
> '90 Vanagon GL - "Wiesel"