Date: Sun, 28 Jun 2020 08:16:38 -0700
Reply-To: Edward Barger <edvbarger@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Edward Barger <edvbarger@YAHOO.COM>
Subject: Re: Coolant Hoses, Complete Set -- Remove and Replace
In-Reply-To: <CY4PR0801MB3731CDCBA0BE18B278E376FBA0910@CY4PR0801MB3731.namprd08.prod.outlook.com>
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Have been following this with much interest
Do you know what operating tempr / for stat the 93 Subi engine I have in our van ?
thank ed
Edward V Barger
edvbarger@yahoo.com
310 922 6251
“Age is an issue of mind over matter …
If you don’t mind it doesn’t matter "
Mark Twain
> On Jun 28, 2020, at 8:13 AM, Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote:
>
> This is really a tough one to answer. There are reasons the factory chose the 87C, 188.7F. The 80C is 176F. Many vehicle runs even hotter, 205 is not uncommon. While heat is an enemy there are efficiencies to be gained at this temperature and many vehicles run even hotter. To me 176F is hot enough to burn off contaminants in the oil but it will make significant difference in heater performance. This also helps with oil temperature especially on the 2.1L with the heat exchanger. There is also the benefit of reduced piston temps and pre-ignition. The reality though is at elevated outside temps you wont be able to maintain this. With a lower temp radiator switch you can end up with the fan just running constantly or worse calling for high speed cutting off the AC. The other concern is that trying to stay lower you end up thermocycling the engine more frequently. A major goal to engine operation and longevity is consistency. Get it hot, let it expand, and keep it there. If you have a problem controlling temperature the lower stat will only delay the inevitable. Having the coolant cool while the pistons and oil are hot is a good way to scuff them.
>
> For the Waterboxer the weakness is oil temperature control. If you want to extend engine life that is where you begin.
>
> Dennis
>
>
> From: Dan N <dn92610@gmail.com>
> Sent: Saturday, June 27, 2020 7:14 PM
> To: Dennis Haynes <d23haynes57@hotmail.com>
> Cc: Vanagon Mailing List <vanagon@gerry.vanagon.com>
> Subject: Re: Coolant Hoses, Complete Set -- Remove and Replace
>
> thank you for the comments regarding the hole on the thermostat...
>
> now another question...
>
> are there any benefits (or pros and cons) regarding a 80°C thermostat vs. a 87°C thermostat for the water boxer?
>
> thanks
>
> dan
>
> On Sat, Jun 27, 2020 at 3:14 PM Dennis Haynes <d23haynes57@hotmail.com<mailto:d23haynes57@hotmail.com>> wrote:
> You are correct regarding engineering for many parts. Thermostats make things a bit different as the parts suppliers try to make parts fit as many applications as possible so often details are missed or added that shouldn't be. For Vanagon t-stats a very common mis step is the diameter of the lower disc. Thermostats catalogued by the main body diameter and temperature will often have the wron lower disc, as used in many other VW-Audi products. I just obtained some stats "Facet" brand. Box says made in Italy. These have the small hole with the bobble pin. The lower disc is also flat instead of the step. It is the correct diameter and height.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com<mailto:vanagon@gerry.vanagon.com>> On Behalf Of David McNeely
> Sent: Saturday, June 27, 2020 3:11 PM
> To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
> Subject: Re: Coolant Hoses, Complete Set -- Remove and Replace
>
> I would think that if a thermostat has a hole, it was a part of the engineering for the cooling system or at least for the thermostat. If it does not have a hole, same assumption. In other words, I don't modify parts. However, like you did, I check with experts (which does not include me). mcneely
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