Date: Fri, 18 May 2012 23:09:44 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Questions/Advice Needed 1980 VW Westphalia
In-Reply-To: <4FB6B19D.3060800@turbovans.com>
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My memory may be hazy but I think all the 2.0 air cooled engines had the
sodium valves. The good back even tells yo how to cut them and make the
reaction before disposing of them. I had a 79 beetle convertible. 70-75
would get the oil and head temps up regardless of top being opened or
closed. I even melted a piston once.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Scott Daniel - Turbovans
Sent: Friday, May 18, 2012 4:31 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Questions/Advice Needed 1980 VW Westphalia
Don ..'coolant' ...?
There usually isn't any liquid coolant in an air-cooled 1980 Vanagon engine.
( though if it was built really well it could have sodium-filled exhaust
valves )
All air-cooled VW engines need to be kept spinning at a fairly good rate
when load is high ..such as in hill climbing ..
as engine cooling air flow is directly related to engine rpm.
that would be like 3,800 t0 4,000 rpm is far better than 2,800 rpm, for
example, climbing a hill.
a barely related interesting, I think, note..
a convertible VW Bug with the top down, at speed, like say 70 mph on a hot
long California freeway grade, overheats, badly even, due to blockage of
good air flow to the engine by the folded top .
Now there is a vehicle that could use an oil temp gauge all right.
scott
turbovans
On 5/18/2012 8:58 AM, Don Hanson wrote:
> Right, but lugging the motor on climbs or slow driving, that
diminishes
> the internal coolant flow, which IS directly rpm-related. Lugging also
> diminishes the oil pressure and it's flow rate.
>
> The amount of 'force' required to move the van, that remains equal
> no matter what the rpms, but when you lug a motor down, you have to
> supply that same amount of force with fewer (but bigger, harder, more
> stressful) 'splosions against the pistons and rods and bearings. Add
> to that Big Bang the fact that there is slower coolant flow and
> therefor less heat exchanged at the radiator. In conjunction with the
> lower oil pressure and flow, you have a recipe for increased bearing
> wear, burned pistons, worn rings and possible overheating...
>
> Don Hanson
>
>
> On Fri, May 18, 2012 at 7:23 AM, Mike Miller<mwmiller6@att.net> wrote:
>
>> 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.
>>>
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