Coolant Temp/Syn Oil

[rocco16 at sbcglobal.net (Larry Fry)]

Since fans are not normally on at cruise, I can't see how a faulty fan 
circuit could increase coolant temps at speed.
  Idling?....yes...but not at speed.
Enlighten me.

Larry
sandiego16v

 A low-temp fan switch (in my experience)
> kills economy and power...
> David
>
> LOL, I never heard that one before...
>
> The cause, is most likely a corroded terminal (as mentioned in my 1st 
> reply)
> on the rad fan switch, and the connector, or just a bad switch.
>
> When I first bought my '88 16V, the temp gauge needle would be just over 
> the
> LED, when driven hard, and the engine would slightly ping.
> I installed a low temp fan switch, which stopped the pinging, and the 
> needle
> never went past the LED.
> Run the engine at idle and make sure the fan comes on before the 
> temperature
> gauge goes past the halfway point (this assumes that you have the lower
> temperature fan switch, which you should have).
>
>
> Check your terminals Dan, I bet at least one terminal is corroded.
>
> Btw, the rad fan switch usually only closes at idle, or stop and go 
> traffic.
>
>> Hey Dan,
>>
>> Try a low temp fan switch, and/or check the terminals for corrosion.
>> The rad fan wiring is right below the battery, and prone to corrosion.


>> So I started using Moble 1 15w50 in my 16v.  My highway cruising
>> coolant temp has risen to above the led on the gauge (needle just clears
> the LED).
>> Goes back to normal when sitting still. The strangest thing was that
>> when I put the A/C on the coolant temp drops to normal (needle
>> directly on the LED) when cruising.