coolant system tester

[Brett Dikeman]

I borrowed a snapon coolant system test tool, which included a set of 
adapters for attaching to the expansion tank; the tool then attaches 
to the adapters.

However, while two of the adapters(which honestly appear identical) 
seem close and roughly the right type, they don't even come close to 
having the right diameter.  There's also a mystery ring of some sort 
that fits around the center part of the adapter, tank side.

The kit was borrowed from a Porsche mechanic, and when we examined 
the cap(engine was too hot to remove it), he said "oh, looks just 
like some of the Porsche and VW ones", and we assumed that even if it 
wasn't, one of the adapters would work.

Anyone know anything about this?  Is there a mystery adapter floating 
around somewhere in his shop, or did Snap-on only sell it with 
one-make adapters?

B
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