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It does not appear from the explanation that the crank sprocket slipped while the crank kept turning.


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My theory is that the bolt was overtightened, thus reducing the clamping force just sufficiently that the crank sprocket could shear the roll pin off and spin relative to the crank pulley. Comments?


I don't think my automotive gods would be so kind as to prevent valve damage if that happened. <img src="/forums/images/graemlins/shiner.gif" alt="" />

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