I reuse them all the time.

A tip:

Anneal them before installation. After they are clean and dry, hold them with a pair of pliers and heat them up with a torch. Dip it in water to cool it off, and it's ready to be reinstalled.

It won't leak. <img src="/forums/images/graemlins/kewl.gif" alt="" />

"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).