Date: Tue, 28 Feb 2006 08:08:24 -0800
Reply-To: Robert Fisher <refisher@MCHSI.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Robert Fisher <refisher@MCHSI.COM>
Subject: Re: different expansion tank question
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
FWIW, the Bentley calls the one on the left the 'expansion tank' and the one
on the right the 'refill tank'. I've only seen one outboard tank on a system
before, but A): the tank was right next to the radiator (not 17 feet away)
and B): the radiator itself had the pressure cap on it. I'm guessing the
'extra' tank is there because the radiator doesn't have a pressure cap;
there had to be one somewhere (not to mention they had to have a place for
the coolant level sensor). That would actually make the 'refill tank' the
'expansion tank' by function, it seems to me.
I'm further guessing that they did it that way in attempt to centrally
locate all the service items in the engine compartment. The fact that you
still had to go to the other end anyway to burp the system must've drove 'em
nuts.
Cya,
Robert
----- Original Message -----
From: "Larry Alofs" <lalofs@RCN.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, February 28, 2006 5:04 AM
Subject: Re: different expansion tank question
>I have never understood the use of the term expansion tank in
> this context. I believe that on American cars with "open"
> cooling systems, the terms expansion amd overflow are often
> used interchangably. It's the tank where the extra coolant
> overflows to when it gets hot and expands and doesn't all fit
> in the radiator. A "closed" system on the other hand, is not
> normally expected to overflow, and has a tank with an air
> space to allow the coolant to expand when it heats up without
> producing too much pressure. This can be called an expansion
> tank.
> When peering into the engine bay from the rear of the van,
> the left hand tank is the "pressure tank" and the one on the
> right is the "overflow tank". IMHO :-)
>
> Larry A.
>
>
> ---- Original message ----
>>Date: Mon, 27 Feb 2006 13:41:56 -0600
>>From: John Rodgers <inua@CHARTER.NET>
>>Subject: Re: [VANAGON] different expansion tank question
>>To: vanagon@GERRY.VANAGON.COM
>>
>>Marty Kulmus wrote:
>>
>>>Thanks for all of your inputs. I am sorry for mixing my
> metaphors, I now
>>>know the proper names and locations of Mr. Expansion and
> Overflow. I now
>>>have to get work on testing.
>>>
>>>Marty
>>>
>>>
>>>
>>>
>>Well, it's sort of like this. If you were instructing a bunch of
>>doctors on removing the appendix but were calling it the
> uvula all the
>>doctors would be looking in the throat trying to understand
> what you
>>were talking about.
>>
>>Ah, well. We all goof it at one time or another, and me more
> often than
>>not!! :-)
>>
>>Regards,
>>
>>John Rodgers
>>88 GL Driver
>>88 GL Volksiebus Driver
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