Expansion Plugs

[Kurt Greske <kurt_greske@xxxx>]

Hi Matt,

Oh, to answer your question, I'd use the steel ones EVERYWHERE. I
don't like using dissimilar metals in cooling water because you tend to get
galvanic corrosion at the brass-steel interface. However it takes a steady
hand, an accurate eye, and a "calibrated" whack to get the steel ones to
expand properly. The brass ones don't require as hard a blow. To do this
right without all the practice the guys at Chrysler had, I machined a round
head punch with about the same curvature as a ball pein hammer and hit that
with a three pound sledge. NEVER use a ball pein hammer itself for this
"punch" though because it's very dangerous to hit two hard hammer faces
together.

Kurt 

Kurt Greske ( kurt_greske@xxxx )