I was wondering the same thing too.
I'd say if air scoops help with coolant temp, the radiator or coolant
itself is not working like it should.

On 4/13/2013 8:32 AM, Rob wrote:
> At  4/13/2013 07:46 AM, Tim Whynot wrote:
>> I have these exact airscoops on my Westy. I made them from the HD cement
>> mixing trays. In my opinion these do work at getting more cooler air air
>> to the engine compartment. You can see the temp sensor drop qiuckly whne
>> getting on the highway and up to speed.
>
> You had over temp problems before you put the scoops on and they helped?
> (We're talking water temps right? You don't have an oil temp gauge
> for the engine?)
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> Rob
> vwrobb@gmail.com
>