thank you Dennis,

I think the thermostat in there doesn't open fully. When the engine is
warm, usually the coolant temp. needle sits on the bottom side of the red
LED, now it sits a bit higher on the other top side of the red LED. When I
open the heater at full the temp. needle doesn't move down at all. It's
working, no overheat but I feel that something wrong/lazy with the
thermostat. I could be wrong but I don't feel comfortable with what I see.

dan

On Fri, Apr 23, 2021 at 9:25 AM Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> What problem are you trying to fix? As the Vanagon cooling system has so
> much reserve capacity especially during cold weather getting the engine up
> to temperature is actually a concern. The latest OEM thermostat, revision F
> not only does not have a bypass, the top throttle plate is actually
> gasketed to prevent any bypass from the radiator until it actually moves to
> open. With a good stat this begins around the 87C. If you really want a
> bypass open the bleed valve at the top of the t-stat housing.
>
> Dennis
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Dan N
> Sent: Friday, April 23, 2021 12:07 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Thermostat with a hole?
>
> hi all,
>
> I am planning to replace the thermostat on my tintop syncro 2.1 WBX. I
> will get an 80° thermostat.
>
> When researching the topic on thermostats I found that some of them have a
> tiny hole on it (about 1/16" diam.) and some of them don't have.
>
> Is there a pro and con idea of having one with the 1/16" hole - or even
> drill one hole?
>
> thanks for your help,
>
> dan
>