I think you guys are misinformed...I've personally SEEN 2 6-bolts in the same shop that crankwalked (both with oil squirters). They both happened to make 400+ hp before they did but it happened regardless. The difference is that crankwalk isnt discovered in 6-bolts as often because they dont have a crank angle sensor like the 7-bolts do. As much as I hate to admit it, the 4g64 can walk too. And where did you hear that autos dont crankwalk? Crankwalk is known to happen at any given time throughout the motor life...whether it be at 10k or 150k miles. If you think about it, it makes perfect sense, if it were machining why would the block suddenly let go at 100k? The bearing would have failed LONG before that. It's a gradual process caused by insufficient lubrication of the bearing...since different motors might be supplying the bearings with slightly different oil pressure (very slight difference but thats all that matters), the motors are going to have different failure points. 6-bolts and 4g64's do use a different style of oil squirter too, so they crankwalk quite a bit less than 7-bolts but it still happens. Anyway this thread makes it seem like crankwalk is a plague to DSM's...not the case. The probability of any motor crankwalking is FAR less than people make it out to be.

Jay Jay the Jet Plane