plug sizes

[72ScampTramp]

I need to plugs for my 440.. One is on the water pump where i removed the heater hoses. The other is on the back of the engine there are 2 holes back there for oil sender. Anyone know what sizes these holes are? Ive been searching but not finding anything definate.

 

[Purple Haze]

1/4" and 3/8" both NPT.

 

[72ScampTramp]

1/4" and 3/8" both NPT.

Which are these? Sorry I was asking for 3 hole sizes so not sure which these belong too. and thanks for answering my thread.

 

[Purple Haze]

1/4" is the oil gallery plug, and the 3/8" is the water pump. The NPT is National Pipe Thread which is a pipe plug.

 

[72ScampTramp]

Right I knew that but the ones on the back of the motor I would swear they are different sizes!

 

[Purple Haze]

mine are the same

 

[bOb shingler]

Right I knew that but the ones on the back of the motor I would swear they are different sizes!

1/8" and1/4", they are both npt. the 1/8" gets the electrical sending unit and the other one's has a plug in it.