How to prevent the engine from freezing and cracking? How to choose the material of freeze plug?

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How to prevent the engine from freezing and cracking? How to choose the material of freeze plug?

Jul. 22, 2022

Freeze plug, also known as, Water Plug, bowl water plug, engine cap, cylinder cap, water blocker, water stopper, core plug, water block;
The antifreeze plug, as the name implies, is to prevent freezing. In winter or when the temperature is low, the water in the engine freezes and the antifreeze plug is pushed out first, so as to protect the engine and prevent the engine from freezing.

How to prevent the engine from freezing and cracking? How to choose the material of freeze plug?

Expansion Plugs are produced from the highest quality steel in a wide variety of cup designs. For marine, performance, or heavy duty applications we recommend brass or stainless steel materials. We carry standard cup, shallow cup, and concave cup in all three materials, as well as in metric sizes.

How to prevent the engine from freezing and cracking? How to choose the material of freeze plug?
There are three commonly used materials for antifreeze plugs, stainless, iron and brass.
NNK can provide 10-60mm antifreeze plugs to ensure quality, buy now and ship now.

How to prevent the engine from freezing and cracking? How to choose the material of freeze plug?

The core plug is usually a thin metal cup that is press-fitted into a cast hole, but can also be made of rubber or other materials. In some high performance engines, the core plug is a large diameter cast metal threaded pipe plug. Core plugs are often a source of leakage due to corrosion caused by cooling system water. Therefore, it is necessary to use a good antifreeze plug.
freeze plugs are mainly formed by stamping metal or non-metal sheet materials with the help of the pressure of the press through the stamping die. It mainly has the following characteristics:

⑴ The parts are light in weight and good in rigidity.

⑵ high dimensional accuracy.

⑶ good surface quality, smooth and beautiful appearance.


Copper washer are refined from high-precision, high-hardness sheet materials, usually used in precision molds or precision hardware... After heat treatment and fine grinding, they have high precision, strong tensile strength, and good finish. Toughness and not easy to break.

Antifreeze plugs are used in large quantities and are usually used in sets. Common antifreeze plug kits:

Engine block coolant and oil plug kit, Brass Freeze Plugs, Threaded Oil Plugs, Chevy, GM LS GenIII/IV, Kit. Part Number: SUM-G1584.


Brass Freeze Plug Kit Direct Replaces Automotive Easy to Install Small Block Expansion Plug Kit for Ford 302Ci 351Ci 255Ci 260Ci 289Ci.


Gaskets and Freeze Plugs - Freeze Plugs & Block Acc. ... Butler Performance Brass Freeze Plug Kit For Cast Iron Cylinder Heads Up BPI-1021


P/N EPC-17B Replaces rusty, leaking, or damaged steel freeze expansion plugs Complete kit replaces ALL of your factory freeze expansion plugs


Brass Freeze Plug and Oil Gallery Plug Set For 2V Heads - Pair ... Modular Head Shop - Brass Freeze Plug Kit for 4.6L Romeo Iron Blocks.

Freeze plug stock model

Size Name Material    
10MM Freeze plug Brass,iron,stainless    
12MM Freeze plug Brass,iron,stainless    
13MM Freeze plug Brass,iron,stainless    
14MM Freeze plug Brass,iron,stainless    
16MM Freeze plug Brass,iron,stainless    
18MM Freeze plug Brass,iron,stainless    
19MM Freeze plug Brass,iron,stainless    
20MM Freeze plug Brass,iron,stainless    
21MM Freeze plug Brass,iron,stainless    
22MM Freeze plug Brass,iron,stainless    
23MM Freeze plug Brass,iron,stainless    
24MM Freeze plug Brass,iron,stainless    
25MM Freeze plug Brass,iron,stainless    
26MM Freeze plug Brass,iron,stainless    
27MM Freeze plug Brass,iron,stainless    
28MM Freeze plug Brass,iron,stainless    
29MM Freeze plug Brass,iron,stainless    
30MM Freeze plug Brass,iron,stainless    
31MM Freeze plug Brass,iron,stainless    
32MM Freeze plug Brass,iron,stainless    
33MM Freeze plug Brass,iron,stainless    
34MM Freeze plug Brass,iron,stainless    
35MM Freeze plug Brass,iron,stainless    
36MM Freeze plug Brass,iron,stainless    
38MM Freeze plug Brass,iron,stainless    
39MM Freeze plug Brass,iron,stainless    
40MM Freeze plug Brass,iron,stainless    
42MM Freeze plug Brass,iron,stainless    
45MM Freeze plug Brass,iron,stainless    
50MM Freeze plug Brass,iron,stainless    
52MM Freeze plug Brass,iron,stainless    
55MM Freeze plug Brass,iron,stainless    
56MM Freeze plug Brass,iron,stainless    
58MM Freeze plug Brass,iron,stainless    
59MM Freeze plug Brass,iron,stainless    
60MM Freeze plug Brass,iron,stainless    

NNK pleased to deliver Freeze plug,Water Plug, bowl water plug, engine cap, cylinder cap, water blocker, water stopper, core plug, water block;Material: brass/iron/stainless.If you need freeze plug, please contact us to provide you with the best quality.

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    Mr ken (sales manager): +86 156 0767 8250