what size are threads of engine

[Paul Smith]

Basically i am after a oil pressure T piece but i need to know what size thread the cg13 engine uses so i get the right size?

How do you measure this?

Thanks

Paul

 

[frank]

i think its 1/8th" bsp paul

 

[TONEY]

1/8NPT iirc

 

[frank]

1/8 npt is 27 tpi and .405" dia
1/8 bsp is 28 tpi and .383" dia

edit and mine measures .390" dia lol

 

[Paul Smith]

its to go under the inlet maifold where the oil pressure sensor plumbs in, Thank you for the sizes

 

[Antony]

its none of these.. its 1.8thBSP tapered. remember its a tapered fit or you could crack your block fitting it in.

 

[Stani1029]

you say your using the a feed from the oil pressure switch, let me know how you get on as i used this and have now went back to the plug on the front of the head.