How to Change/replace a Freeze Plug
Here is a "how to" for the shade tree mechanic, and maybe even the pro mechanic.
It’s been a while since I have written anything, as I have had lightning strike my computer, modem, and router, which put me down for awhile. (Why do people want to move to Florida again?). I am very grateful and fortunate to be blessed with abilities in music and science (machines). The two do have a co- relation.
For example: I have long slender fingers with the coordination to play the piano, but this also comes in handy when I am working on engines. You may be able to relate to this, especially when you get to a nut or bolt that you just can’t get to!
Let’s face it. Some of the vehicles today are insane to work on. Either you have to be a contortionist and triple jointed, or have all of those “special tools” with some wacky number like 2a4487b24. Or a left hand threaded tap wrench with some ridiculous size like 6.5mm. I am sharing this in hopes that it may benefit the “do it yourself-er” or “shade tree mechanic.” For that matter, maybe this would interest a pro mechanic. Then, of course, I may not be the only one who has tried what follows.
I am first going to assume that whoever is reading this has some basic mechanical knowledge. I wish to shed a little light on the “freeze plug.’’ I have rebuilt and/or helped rebuild quite a few engines in my time, and have (like many before me) become familiar with the freeze plug. For those of us not familiar; a freeze plug is usually a round, dish shaped piece of metal, which is pressed or driven into the engine block and the engine head. There are multiple sizes, and usually multiple locations depending on the engine, and its maker.Common freeze plug locations are:
- Behind the block or cylinder heads, obstructed by the transmission bell housing and/or firewall
- along the sides of the engine block, usually obstructed from view by the exhaust manifold.
- The front of the cylinder heads and block, usually behind the air conditioner compressor, alternator, water pump, and/or belts and pulleys.
A COMMON MYTH ABOUT THE FREEZE PLUG:
It is an expansion device made to prevent damage to the engine in case the water in the engine should freeze. The plug pops out, instead of the engine freezing.