Core plug size

[Teeball]

1 1/2" diameter or 1 3/8" diameter mopar says one and a half parts store say 1 3/8 the one that came out on my measuring tape it looks like 1 3/8" it's the one above the starter 2002 liberty 3.7

 

[LibertyTC]

I'll look it up on the fiche right now stand by.

 

[LibertyTC]

From 2003 fiche. There are a few different sizes. From images you may have a better idea which one you are looking for.
See page 192 onward.. https://colorado4wheel.com/manuals/Jeep/KJ/03kj_PARTS_FICHE.pdf

 

[LibertyTC]

^ I assume you have the 3.7^ ?

 

[Teeball]

From 2003 fiche. There are a few different sizes. From images you may have a better idea which one you are looking for.
See page 192 onward.. https://colorado4wheel.com/manuals/Jeep/KJ/03kj_PARTS_FICHE.pdf

Thank you

 

[Teeball]

^ I assume you have the 3.7^ ?

Yeah 3.7