Thanks for everyone's advice on the proper radiator thermo-switch
wiring. I got the proper switch at my local VW dealer for $18.00, and
installed it yesterday. Then filled/bled the cooling system. Everything
went very well, and the fan came on as the temp needle climbed. No leaks.
Perfect.

But as often happens, one problem is solved, but another comes to
surface. I now hear a noise I never heard before. The #1 cylinder is
now LOUD... a "tick tick tick" that wasn't there pre-overheating. The
engine no longer smoothly revs up. It doesn't backfire, just stumbles.

My ignorant guess would be "burnt valve". Does anyone have any ideas
what this "tick" could be? Is it a critical problem, or something that
will go away? Or that could be cured easily?

Thanks,
Paul Henderson
'84 Vanagon WasserBoxer
Bedminster, NJ, USA