Justice, it looked to me like the left hand plug was new and the rusty one was actually out and you're looking at the cylinder wall in the water jacket. I think the machinist was in the process of replacing the plugs when the picture was taken.

[EDIT] Another look and I think the left side has not been replaced. I would not only replace those, but all the rest as well. The inside of the cooling jacket looks pretty rough and the plugs could be well eaten on the inside.[EDIT]

Frank

Last edited by FrankR; 09/01/09 04:16 PM.
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum