Originally Posted by juffer
mine was doing exactly the same mine was 15 psi down in 1 cylinder and i turned out to be the piston had broke between the 2 compression ringsand very badly scored the block.hope its not like this in your case
juffer
yeah mine was down the side of the pistons, never done anything to the block though................
av had a word with me mate n he say check the breather that comes off the rocket cover... coz the block easily and thats what blows the cap off, if its not missfiring!