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The core plugs are just to hold the casting core in place when the entire block is cast. chances are if your coolant freezes and the plugs pop out, you most likely have a cracked block as well. and material in the plugs is your preference. If the coolant is maintained the plugs will last as long as we do. I have been known to thread the core holes and install threaded racing core plugs. really not needed unless corrosion has taken it's toll on the castings.
To: Chrysler300@xxxxxxxxxxxxxxx From: Chrysler300@xxxxxxxxxxxxxxx Date: Tue, 27 May 2014 17:07:09 -0700 Subject: RE: [Chrysler300] Freeze plug for F I've also used JB weld to hold Welch plugs in place (that's the correct term for the disc type), it works well, and a brass version is the best choice. The term freeze plug, frost plug etc., is a misnomer. Read this on Wikipedia:
http://en.wikipedia.org/wiki/Freeze_plug
Bob J
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx]
I do not understan the use of JBWeld in freeze plugs (seems to me if they ever needed to be replaced due to corrosion it would be very difficult.).Also would that would inhibit the intended purpose and prevent them from popping out if the water did freeze.(not that that really happens if maintained properly.) So in effect these are actually casting hole plugs and we are not concerned with freezing. Personally I have only seen these pop from a freeze, in a boat engine (which usually do not have antifreeze solution in the water jacket) and then only after the block was cracked....... Would something like a head gasket adhesive be OK? J
From: "Chrysler300" <Chrysler300@xxxxxxxxxxxxxxx>
I repeat that the original style plugs are excellent if properly installed. I personally use the brass versions so that corrosion is less likely an issue. I keep things a long, long time. Other types of plugs might be a bit more forgiving of installation and maintenance errors and carrying an expandable rubber plug as a spare is not a bad idea. Another thing to remember is that our old cars were not designed to have pressure caps installed to create the pressure at which our modern cars are typically operating. If you use an excessively high pressure cap you are at greater risk. ---------Marshall Goodknight
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