When you pull the lower intake, look closely at the studs to see if any are rusty. If so, you've got a coolant leak between the stud and the cooling port. You can have a machine shop true the lower intake, but I've been told by Mitsu mechanics that a spray copper gasket sealant should be applied to the gaskets used between the heads and lower intake to stop leaks there. The MLS gaskets can be tough to seal.

Frank

'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