Re: [Chrysler300] G Freeze Plugs

[Rich Barber <barber@xxxxxxxxx>]

Not to be critical of a solution that works, but I must observe that the 
original function of a freeze plug is to pop out in the presence of ice 
inside the head or block and protect same.  I'm not sure an epoxied-in 
plug would do its job.  Minimal risk, though, if proper antifreeze 
levels are maintained.  I would imagine 9,999 freeze plugs pop out 
prematurely or leak for every one that protects a casting.

Rich Barber

Bob Jasinski wrote:

>Richard,
>
>This has come up before with the flat, domed shaped plugs, and is a somewhat
>common problem.  I have had this type of expansion plug, installed even by
>professionals, pop out shortly after the first engine start after a rebuild.
>My solution may be viewed as a bit of extreme by some, but here is what I
>do.
>
>First off, find a replacement that is brass, not steel, that way it won't
>rust out after time.  Clean the bore well, and mix up a small amount of JB
>weld epoxy and coat the inner surface of the bore and the ledge where the
>plug seats with it.  Seat the plug in the bore properly (dome side out)and
>strike the center with a wide, flat tip punch to flatten the plug and widen
>it out.  Wipe of any excess epoxy and let it set up.  You won't have a
>problem with it again.
>
>Bob J
>
>
>
>-----Original Message-----
>From: Richard Osborne [mailto:richard@xxxxxxxxxxxx]
>Sent: Saturday, May 01, 2004 9:47 AM
>To: chrysler300@xxxxxxxxxxxxxxx
>Subject: [Chrysler300] G Freeze Plugs
>
>
>Good Afternoon,
>
>Yesterday afternoon we (Tom Miller and I) finally fired the G for the
>first time. About 4 to 5 minutes into the cam break-in, it spewed a
>freeze plug from the right side cylinder head.
>
>After a few adult beverages and a cool down, I easily popped the
>offending plug from the head. I was surprised to find a "flat" expansion
>plug. By this I mean that it doesn't have a flange.
>
>I just got back from Car Quest with a couple of similar style plugs. Am
>I correct in understanding that the insertion method is to "ping" the
>center of these to make it expand and seat propperly? After looking at
>the previously installed vs. the uninstalled, this appears to be the
>case (I paid the machine shop to do this about 3 years ago, so I wasn't
>the original installer.).
>
>Also, are these to be installed dry? It appearas as though the machine
>shop used some sort of tacky yellow colored stuff on the plugs when
>installed? Does this make sense. Of course, the machine shop was closed
>by the time all of this happened.
>
>Please advise if the concave shaped plugs are meant to be installed by
>hitting in the center as to expand the plug and if you recommend
>installing these dry or with some sort of sealer?
>
>I may try to put a temporary rubber plug in just to see how many others
>will pop out during operation. I'm not too sure I can get it in. We'll
>see.
>
>Best regards,
>
>Richard Osborne
>
>
>
>
>
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>
>
> 
>
>
>
>  
>




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