Date:         Wed, 25 Oct 2017 06:27:25 +0000
Reply-To:     Todd Last <rubatoguy@COMCAST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Todd Last <rubatoguy@COMCAST.NET>
Subject:      Re: Oil heat exchanger fail.. more
Comments: To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
In-Reply-To:  <CY4PR20MB13030533572FCD584230E4C2A0470@CY4PR20MB1303.namprd20.prod.outlook.com>
Content-Type: text/plain; charset=utf-8

This style of heat exchange is common in many engines these days. I had heard that they are to aid in engine warm up as well as cooling - the main reason was to help meet tightened emission requirements.

Todd

----- Original Message -----

From: "Dennis Haynes" <d23haynes57@HOTMAIL.COM>
To: vanagon@GERRY.VANAGON.COM
Sent: Tuesday, October 24, 2017 10:00:25 AM
Subject: Re: Oil heat exchanger fail.. more

You are correct in the theory of operation for the cooler and how it is plumbed. When I had a motor home with the Ford Triton V-10, the oil cooler was fed from the lower radiator hose with a venture manifold. Yes, the oil cooler feed and return went to the lower hose. No radiator flow such as cold engine, no cooling for the oil. As flow increased, cooler coolant from the radiator would be used to cool the oil, not hot coolant from under the thermostat.

As for warming the oil faster during warm except for short trips in very cold weather there is little benefit. Fun Bus had the original cooler removed and replaced with a thermostatically control oil to air exchanger, placed in front of the radiator before its first oil change. Just turned 321K last Saturday so no engine harm there.

Dennis


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of David McNeely
Sent: Tuesday, October 24, 2017 11:28 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oil heat exchanger fail.. more

Hmmm....... . Isn't the entire system engineered to operate with the cooler in place and functioning? And that is not just as an oil cooler as I understand it, but to help to bring the engine up to operating temperature after startup. Of course, others with more expertise may correct me, but that is what I have always understood.

Do these coolers commonly fail for the 2.1 as well? My 1991 Volkswagen Vanagon GL Campmobile with 2.1 engine (manual transmission) has 180K miles with no problem so far from the cooler, so far as I know.

mcneely

On Tue, Oct 24, 2017 at 5:16 AM, Mbob1950 <mbob1950@gmail.com> wrote:

> What is the best way to eliminate the cooler? I was thinking of
> removing it and connecting the coolant hoses together. Any downside to that setup?
>
> Thanks
>
> Bob McCullough
>
>
>
>
>
>
> Begin forwarded message:
>
> > From: Neil N <musomuso@GMAIL.COM>
> > Date: October 23, 2017 at 22:46:50 CDT
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Re: Oil heat exchanger fail.. more
> > Reply-To: Neil N <musomuso@GMAIL.COM>
> >
> > Sure sounds like a messy job.
> >
> > Did you buy that 2 year old cooler new? Sounds like you put a lot of
> miles
> > on it?
> >
> > I guess I was lucky. The O ring on my oil cooler had started leaking
> > so upon inspection of the cooler, noticed it was starting to craze
> > or crack
> a
> > little.
> >
> >
> >
> > On Mon, Oct 23, 2017 at 8:08 PM, Don Hanson <dhanson928@gmail.com>
> wrote:
> >
> >
> > ......
> >
> >
> >
> >> I was hoping all the posts about the VW and the weak oil cooler
> >> was wrong....but mine, about two years old, went out too...When I
> >> get a
> chance,
> >> I'll be taking that out and making a better setup... I never want
> >> to
> deal
> >> with another failure...and I'm lucky nothing more serious resulted
> >> from
> it
> >> blowing..
> >
> >
> >
> > --
> > Neil n
> >
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>