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Date:         Thu, 4 Jan 2018 17:40:13 -0500
Reply-To:     Jason <uberhare@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jason <uberhare@GMAIL.COM>
Subject:      Re: Thermostats especially in colder weather
Comments: To: Toomey Douglas <drt@uoregon.edu>
In-Reply-To:  <7C28BE27-19B5-4D0C-B19A-5B10FF02FA99@uoregon.edu>
Content-Type: text/plain; charset="UTF-8"

Fuel economy. You will burn more fuel if not at the correct operating temp.

Jason

On Thu, Jan 4, 2018 at 5:22 PM, Toomey Douglas <drt@uoregon.edu> wrote:

> This has been an interesting thread. Two years or so ago a new radiator > was put in my 87 van and after that the temperature gauge ran consistently > below the red indicator light; prior to the new radiator it ran on the high > side of the red light. This did not really concern me, until recently, > when I noticed that it is harder to get the cabin warm in the winter. > > I had mistakenly thought the new radiator was more efficient. From this > thread, it seems that the thermostat may not be working well. Except for > the slight lack of heat, is there any downside to my gauges indicating a > cooler temperature for running? > > Thanks, > > Doug > > > > On Jan 4, 2018, at 1:24 PM, Dennis Haynes <d23haynes57@HOTMAIL.COM> > wrote: > > > > Of course in colder weather it will take longer for an engine to warm > up. With a thermostat that cracks open to early it may never warm up. Most > vehicles with small engine do not have 5 gallons of cold coolant available > so even if a stat opens early they still warm up. Another reason is that > the intake air used for combustion is also colder so a lot of cooling > occurs just from intake air. This is a real problem with diesels as they do > not have throttles so every piston stroke takes in the full volume of air > and at idle there is just small amount of fuel burning to warm it. > > > > However, your engine still uses the mixing approach and the heaters > alone have a lot capacity for cooling the engine. If the temp gauge seems > to only go to some point lower than normal it could be a bad or lazy stat. > > > > Dennis > > > > From: Neil N [mailto:musomuso@gmail.com] > > Sent: Thursday, January 4, 2018 3:12 PM > > To: Dennis Haynes <d23haynes57@hotmail.com> > > Cc: vanagon <vanagon@gerry.vanagon.com> > > Subject: Re: Thermostats especially in colder weather > > > > Thanks for that brand suggestion Dennis. Though I'm running a different > VW engine in my Vanagon, I have to wonder if the thermostat is part of the > reason my heater is barely adequate in cooler temps (e.g. 0ยบ C) Amazon also > shows a "Mahle Original TX...." for my engine. > > > > Though my engine has a different cooling system routing, it seems that > in colder weather, my temp gauge needle to take longer to get into > position. I thought that was normal. Seems not. > > > > Neil. > > > > On Thu, Jan 4, 2018 at 11:52 AM, Dennis Haynes <d23haynes57@hotmail.com> > wrote: > > > > ..... I just installed a Mahle TX 24 87D. First road test, WOW! Granted > it is now ~50 here and sunny. Up to temp, gauge needle dead center in ~3 > miles. I will be stocking these. And man the heat works again. > > You can get them here. > > https://www.amazon.com/gp/product/B00D3DH4J6/ref=oh_aui_ > detailpage_o01_s00?ie=UTF8&psc=1 > > > > Dennis > > > > > > > > > > -- > > Neil n > > > > Blog: Vanagons, Westfalia, general > > > > 1988 Westy Images > > > > 1981 Westfalia "Jaco" Images, technical > > > > Vanagon-Bus VAG Gas Engine Swap Group > > >


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