Yep soapy water is good if you can't immerse the whole wheel.

It will certainly show any problems if you fill the op of the valve stem.

If the valve is leaking and it is a Schrader valve (http://en.wikipedia.org/wiki/Schrader_valve) don't over tighten the valve. You might get one of those prong shaped security bits to fit (see http://www.peachparts.com/shopforum/showpost.php?p=2715799&postcount=17 for the type of thing I mean)

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!