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Old 11-04-2002, 05:50 PM's Avatar is offline
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Stoned, invariably the heads on stock 400 are cracked , you can check 20 pairs and 18 will be cracked between the bolt hole and the steam hole, this can be repaired with a sleeve in the bolt hole. some people let the crack go and get away with it, i haven't ever been that lucky. the cranks usually are good just check the thrust bearing surface at the rear journal, no wear is allowed unless you want to go for oversize thrust type bearings that are hard to find and costly. also watch for cracks through the oil hole in the main webs of the block, usually not a problem on 400's but i have seen it a few times. stock pistons will crack in the skirts up from where the steel strut is on the sides.
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