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Reply to "Cooling tins"

Shortly after the aftermarket started selling the Super Cool tins as a cure for 'type 1 cooling troubles' (this was made up so they could sell you more parts and separate you from more of your hard earned $$$!), VW put out a service bulletin instructing their service departments (and mechanics) NOT to use the type 3 tins (that's all they are) on type 1 engines.  As already said, the two systems are different- type 1 forces air down through the cylinder and head fin areas while the type 3 uses a horizontal fan- and most of the parts are incompatible, the bottom air deflectors being one of those things.

THAT said- I have heard of guys modifying the type 3 air deflectors when the type 1 sled tins won't fit because of the merged header design, but it's simpler (and more effective) to modify the sled tins.  But- running the type 3 pieces without the sled tins will cause overheating if the thermostat and flaps are installed- the system depends on the thermostat sensing the temp of the spent cooling air (which is what happens when it is enclosed by the sled tins).   With the thermostat being exposed to the cooler outside air, I wonder how much of the time it will actually open?  How hot will the engine be running then?

Hope this helps.  Al

Last edited by ALB
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