The water pump on the water cooled engines is affected by engine speed.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike Miller
Sent: Friday, May 18, 2012 10:23 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Questions/Advice Needed 1980 VW Westphalia

I thought all vans had electric cooling fans which were unaffected by engine
speed?

Mike

On May 18, 2012, at 3:11 AM, Dennis Haynes wrote:

> Especially for the air cooled engines you should not really be doing
> extended climbs at low RPM. Down shift and let it rev. Lugging (when
> increasing throttle does not increase speed) causes this engine to
> heat up quickly and low rpm also means low cooling fan output. You
> need to determine if your problem is loss of fuel or ignition. I
> believe your 80 still uses ignition points and condenser. A bad
> condenser can cause loss of spark and be affected by heat. The loss of
> spark from the points-condenser also effects the operation of the
> injectors.
>
> For the auxiliary air regulator these hardly ever go bad. Check to
> make sure it is in fact getting power and check its resistance to
> determine that the heater is not open. Be sure the wiring is not
> switched with the cold start valve or thermal time switch. This device
> was used on a lot of vehicles. You should be able to get something
> close or a good used one.