Thread: *** Leaking Welsh Plugs ***

Originally Posted by jammat

Hi guys,i have just noticed today that the lower front passenger side engine welsh plugs are leaking on my 3.9 Disco,i am going to change as many as i can with the engine in situ if poss,does anyone know if these are all the same size or perhaps a mixture of sizes?

hi im rebuilding my 3.9 disco engine i have breefly looked at my block wile it was in the machine shop there are at least 3 diffrent sizes on the block alone, at least 6 around the block sides, and one larger one covering the cam at the back of the engine and smaller ones up the front 1/2 inch range. i dont have the exact sizes yet, i will have the block back in 2 weeks ill let you know if you havent got it figured out by then. if one has gone, its best to pull them all, i had an engine that looked ok, when i was rebuilt i pulled one just too look and it was badly coroaded from the inside out. i used brass plugs and they were great , i am going to use brass again. the ones i got were from supercheep and they were much better than i thought they would be.

do you know how to put them in ? i can give you some tips if you like. be carful of the info on line. there are some bad ideas going around.

cheers. jeff.

Replace them with Irish plugs - use the green ones not the orange ones.