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Any Auto Parts Store can provide this information. BTW, the are called Freeze Plugs or Casting Plugs, not Frost Plugs.
1-1/2"
sasg
Probably 1 5/8".
Should be 1 5/8".
If you mean the freeze plugs......they are located on the bottom side of your engine. They are round and are about the size of a half dollar.
Freeze plugs are located in numerous places on the engine block and cylinder head assemblies. Replacement of freeze plugs is usually beyond the skill level of most amateur mechanics.
1 1/4" shallow cup
There are three on each side and two on the rear.
The type of plug depends on the size of the engine. The plugs are under the chromed covers at the top of the cylinders.
If it is a freeze plug it would not have threads. Freeze Plugs are designed to pop out of the block should the water in the block freeze. This could not happen if the plug was threaded. Hope This Helped.
When changing the spark plugs of a vehicle a person has to gap the plugs at the right size. The spark plug gap for a 2003 Heritage Softail is .036 inches.Ê