Anyone have a stock crank pulley become unbalanced?
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MBWorld Fanatic!
Joined: Jun 2004
Posts: 1,140
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From: Ashburn, VA
2004 C32, 2006 Honda CBR1000RR, 2007 Harley NightRod, 2013 Harley Road Glide Custom
Anyone have a stock crank pulley become unbalanced?
Looking at a total different issue, I noticed the crank pulley (I think is OEM) looking a little unbalanced as the engine was running. It looks like the outer piece (whatever that is made of) as the belt was shaking on it. Every other place where the belt goes looks smooth (ps, sc, idler pulley etc.). What's up with this? Car has $70k on it.
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From: Orange County, CA
GMC - Miata - Trek - P-Car
Unbalanced? No, although it’s certainly a possibility if its respective rings have slipped from their original relationship.
However, yes, some minimal axial and radial runout is considered normal.
The elastomer between the inner and outer portions is subject to wear and deterioration after millions of cycles. MB has issued recalls for defective harmonic dampers originally installed on thousands of their engines, including early M112s, although the C32 was never included among them.
If yours is suspect, have it replaced pronto. Had one come unglued on a SBC at ~7000 rpm. Made a heck of a mess! Never one to tempt fate, I swapped the C32’s OE damper for a quality aftermarket piece.
How much is too much?
Trust you’ll find boohooramblers’ excellent treatise on the subject to be helpful…https://mbworld.org/forums/c32-amg-c...formation.html
However, yes, some minimal axial and radial runout is considered normal.
The elastomer between the inner and outer portions is subject to wear and deterioration after millions of cycles. MB has issued recalls for defective harmonic dampers originally installed on thousands of their engines, including early M112s, although the C32 was never included among them.
If yours is suspect, have it replaced pronto. Had one come unglued on a SBC at ~7000 rpm. Made a heck of a mess! Never one to tempt fate, I swapped the C32’s OE damper for a quality aftermarket piece.
How much is too much?
Trust you’ll find boohooramblers’ excellent treatise on the subject to be helpful…https://mbworld.org/forums/c32-amg-c...formation.html
Thread Starter
MBWorld Fanatic!
Joined: Jun 2004
Posts: 1,140
Likes: 2
From: Ashburn, VA
2004 C32, 2006 Honda CBR1000RR, 2007 Harley NightRod, 2013 Harley Road Glide Custom
Unbalanced? No, although it’s certainly a possibility if its respective rings have slipped from their original relationship.
However, yes, some minimal axial and radial runout is considered normal.
The elastomer between the inner and outer portions is subject to wear and deterioration after millions of cycles. MB has issued recalls for defective harmonic dampers originally installed on thousands of their engines, including early M112s, although the C32 was never included among them.
If yours is suspect, have it replaced pronto. Had one come unglued on a SBC at ~7000 rpm. Made a heck of a mess! Never one to tempt fate, I swapped the C32’s OE damper for a quality aftermarket piece.
How much is too much?
Trust you’ll find boohooramblers’ excellent treatise on the subject to be helpful…https://mbworld.org/forums/c32-amg-c...formation.html
However, yes, some minimal axial and radial runout is considered normal.
The elastomer between the inner and outer portions is subject to wear and deterioration after millions of cycles. MB has issued recalls for defective harmonic dampers originally installed on thousands of their engines, including early M112s, although the C32 was never included among them.
If yours is suspect, have it replaced pronto. Had one come unglued on a SBC at ~7000 rpm. Made a heck of a mess! Never one to tempt fate, I swapped the C32’s OE damper for a quality aftermarket piece.
How much is too much?
Trust you’ll find boohooramblers’ excellent treatise on the subject to be helpful…https://mbworld.org/forums/c32-amg-c...formation.html
Thanks! I'll check that out right now.
Bob
