Size of M90 supercharger bolts? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-07-2007, 05:33 PM   #1
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Default Size of M90 supercharger bolts?

Anyone know what the diameter / thread size / pitch is for the M90 */C to LIM bolts?
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Old 12-07-2007, 05:46 PM   #2
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Should be the same as the UIM to LIM bolts of an L36. Probably M6x1. (10mm head)
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Old 12-07-2007, 05:48 PM   #3
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That sounds right. And the M90 and M62 are the same. LIM bolts to heads are also the same diameter and pitch.
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Old 12-07-2007, 06:13 PM   #4
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Wow, that small? For 17 ft-lb torque spec?

Anyone know what the strength designation on those bolts is?
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Old 12-07-2007, 06:25 PM   #5
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The bolts are mild steel (probably grade 5) with a crowned/washer head.
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