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Assuming your has been running without an overheating problem I don't think that requires an overhaul just based the jacket.


Kevin -

Within the last couple of weeks, someone told that they were running higher than 87 octane to keep spark knock at bay...... if that was Larry, I can see why.

The 3.0L blocks that I have seen look that bad around the cooling passages have been very gunked up lower in the jackets.... particularly toward the outboard areas of the jackets, where sediment is more prone to accumulate.

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