what does freeze plug on a car do?

Answer 1

All of these answers are good but unfortunately none are correct.

Those plugs are there because of the holes they are plugging, the holes are there because when an engine block is cast (molten metal is poured into a sand mold in the shape of the engine) the shapes of the coolant passages within the walls of the block are very tricky to remove the left-over sand from so the widely adopted practice has been to cast holes in the block to ensure that all the sand is removed before assembly, while the hole plugs will sometimes pop out due to frozen coolant that is not their purpose, it's merely to be a hole plug =)

Answer 2

What Is A Freeze Plug

Answer 3

A true Freeze Plug is an expansion plug located in the side of an engine block that is supposed to protect the block against freeze damage. Water expands when it turns to ice, and if the coolant doesn't have enough antifreeze protection it can freeze and crack the engine block. The freeze plugs (there are usually several) are supposed to pop out under such conditions to relieve the pressure on the block.

Most of the plugs to be found on an engine are actually to plug the holes where sand cores have been held. The sand cores are used in the casting process to form internal cavities in the engine block or cylinder head, for cooling water for example, and so should really be referred to as core plugs.

Answer 4

A freeze out plug does just what it's name describes. If your motor was frozen in cold weather, the freeze out plugs are designed to releave the pressure as the water freezes and burst out, otherwise the engine block would crack from the exspansion of the water causing more damage and money.

Answer 5

a freeze plug goes into the side of the block, about half way between the heads and the bottom off the block, most the time around 1 1/2" four on a side on a V-8, they are round steel and if you have weak anti-freeze in you vehicle and it gets freeze your butt cold out, they pop out instead of breaking you block. This will NOT protect you radiator or hoses though.

Answer 6

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RE:
what does freeze plug on a car do?

Answer 7

Freeze plugs are installed in an engine block to help prevent damage to the block. They are installed at various points on the block, there is cooling water running in a passage behind them. If the outside temperature gets cold enough to freeze the water in the block. ( water ex-spans as it freezes) The freeze plugs will pop out of the block allowing room for expansion of the water as it freezes. This will hopefully prevent damage to the block.

Answer 8

Will The whole main purpose of the freeze plugs is that they keep engine coolant where it all belongs and over time they tend to get dirty and then start to rust out.The first sign is they start seeping out slowly and when they do you must act quickly to avoid any kind of disaster because the coolant then runs out and this is something you don't want to have happen to you. Hope I answered your question.

Answer 9

Actually this answer is pretty close, but not 100% correct: in sand casting the motor block SOMETHING has to hold up the cylinder mold of sand inside the rest of the mold. This is done with little "pillars" of sand which hold up the inside parts of the mold. These little pillars of sand of course leave holes that have to be plugged, hence the "freeze plugs". Trust me: if there was any way they could get the inner parts to just float there they wouldn't cast holes in their blocks, and they CERTAINLY wouldn't put them there just to remove the casting sand from the finished block!

Answer 10

Can you use a flat file on the bolt faces and restore the sharp corners? Then try fitting the next smaller size socket (either metric or inch size, which ever fits the bolt.) Be sure to use a 6-point socket -- a 12-point socket has too many angles and will only round off the plug head again.