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Date:         Fri, 24 Sep 2010 07:43:49 -0700
Reply-To:     Alistair Bell <albell@SHAW.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alistair Bell <albell@SHAW.CA>
Subject:      Re: Coolant/Oil that oil filter interface.. reasons
Comments: To: Don Hanson <dhanson928@GMAIL.COM>
In-Reply-To:  <AANLkTi=+Csg2gNkwjz2mRjhv4DhOeXm21iQn88AdyPj7@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

sure cut it off, just why the heck did VW go to all that troubled adding one.

(And continued to use it in various models through the years)

But you seem to have done a thorough analysis.

(it actually does work. it helps oil to get to op. temp during warm up and does moderate oil temps during running)

alistair

On 24-Sep-10, at 7:08 AM, Don Hanson wrote:

I understand that many VW motors, some WBX included, have the oil filter/coolant heat exchanger like the one 'above' the oil filter that I found on my 93 Jetta (recent) transplant block. I just swapped this new ABA motor into my 84 vanagon in place of a 92 1.8liter inline VW. The 1.8l motor has no exchanger like that. Looking at this thing, it seems a bit....useless?

Is it supposed to 'cool' the oil? Heat the oil? Up or Down to the temp of the coolant? That temp. is about 188f with an 87c thermostat...about normal oil temp anyhow. The temperature difference, as influenced by the coolant circulating around the oil filter pipe, is that same condition not present all over the motor? As coolant circulates through the head and block, it shares the same contact with the metal as the oi/ in adjacent passeges, right? Is there a real advantage to adding that extra small 'interface' at that "cooler? Heater?" ...whatever you would call it? It looks like there might be very little thermal exchanging going on there, between the oil and the coolant, given the surface areas involved.

It seems like that device just a couple of extra hoses and clamps to an already painfully complex cooling system, for not much 'real world' difference, other than another possible failure point to lose coolant.. Looks a litte cheesy, too..that stamped chamber of flimsey alloy.

My 1.8 liter without that type exchanger had no issues whatsoever involving oil temps in the 60k hard hard miles I put onto it..

Just curious..any body else have an opinion or give a darn about this little widget?

PS...I am leaving mine on there, for now, without any coolant circulating through. I might sometime hook it up and monitor the oil temp...see what happens in the motor...I bet Not Much..

Don Hanson


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