Re: [Chrysler300] core plugs/392

I've successfully installed many of the plugs you are referring to and they do work well if properly installed. Most of those I've seen that had been previously replaced were not correctly installed. Striking the center of the plug too hard and not straight seems to be one of the most common errors. Another error is striking it with a small hammer and denting it inward creating a concave surface within the originally convex surface. The correct procedure is to use a special driver tool that has a flat surface nearly as large as the core plug and strike with a hammer large enough that you don't have to strike it repeatedly. I don't want to hit one more than 2 or 3 times. About 1/2 or a little more of the plug's surface should then be flat. It will have excellent holding power.

---------- Original Message ----------
From: "'John Grady' jkg@xxxxxxxxxxxxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx>
To: <Chrysler300@xxxxxxxxxxxxxxx>
Subject: [Chrysler300] core plugs/392
Date: Thu, 28 May 2015 14:46:05 -0400

Hi,

Took out the finally finished , really nice 300C convert this AM (Gauguin (sp?) red!) ,promptly lost a core plug in first two miles, of course the one behind the motor mount (hey it could have been one on the head) .

All were new, supposedly Pro installed, by marine Chevy engine shop in California before I bought the block from them (300D block) ; at bottom of empty hole is what looks like RTV or Silicone , probably both wrong (Indian head, or Permatex, to me, belongs there ) ,but even more important , they were the thick flat disc type..looked dented in, but how can you tell if dented enough ? It did not hold.

I have new ones I sort of hoarded 25 years ago, of brass, to replace it, they do work--- it seems ---if in right , so this one was NOT in right , no rust issues, clean.

So not hit hard enough? How do you tell. I know brass cup type is “preferred” but that means ?machining? step out of hole ,engine is in car , all new and painted . I am SURE someone in 300 land knows all about this. Now I am afraid some other one will pop out, not pretty at all. Removed ?incorrect? 15 psi cap for 7 psi , but overheating not involved,--not set in right in hole is my diagnosis . Cannot bring myself to put in rubber ones..

Help help !!

__._,_.___

Posted by: "mgoodknight@xxxxxxxx" <mgoodknight@xxxxxxxx>

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