RE: [Chrysler300] G Freeze Plugs

["Bob Jasinski" <rpjasin@xxxxxxxxxxx>]

Ray,

Thanks for the excellent advice and input on the brass expansion plugs.  I
know the JB weld epoxy approach certainly could be viewed as "extreme", I do
know that it works.  As Mike Apfelbeck pointed out, the plugs were
originally installed to facilitate the casting process, and became known as
"frost" or "freeze" plugs because they do pop out when the coolant freezes,
but that doesn't necessarily protect the block.  Having said that, I
wouldn't be surprised if the freezing coolant would have adequate pressure
to force out the epoxied plug as well as other sealants.

The fact that the brass plug is a softer metal than steel really makes it
the superior choice for this purpose.  I hadn't really considered how much
of a benefit that is, as I was focused on the anti-rust properties of brass
vs.: steel.

All of this is on my mind because my G has some rust evident on several
expansion plugs.  they were installed when the engine was rebuilt in '78 and
I didn't have a clue back then about the brass plugs.  Now I am challenged
to have to replace the rusty plugs with the motor in the car...what fun!

Bob J




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