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Old 03-18-2022, 09:12 PM
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Henn28 Henn28 is offline
Join Date: May 2021
Location: Louisiana
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Originally Posted by AV8R4AA View Post
Does anyone here know what, if any differences the harmonic balancer
is between the M62 4.4 and the 4.6. I’m driving a 4.6.
Asking because mine has a slight wobble and would like
to replace it with better pulley.
New is 500+
I’ve had them both in my hand, recently. I ended up getting a new 4.6 balancer for my motor build…three actually since the first two arrived damaged from BMW. The 4.4 and 4.6 cranks are different, ergo, different balancers. The 4.6 has 6 dimples drilled into its lip while the 4.4 had fewer. Three or four, I seem to recall. These extra dimples I guess serve some purpose in balancing the 4.6 crank. The 4.6 balancer is also an under drive piece which extracts a bit more power out of the motor by running the accessories slightly slower. Not critical, but I think the different number of balancing dimples are probably reason not to sub the 4.4 balancer. Although I suppose the dimples could also serve to balance the actual balancer. Although it is a pretty precisely machined pice of metal.

As you mention, they (4.6 pieces) are close to impossible to find used. I also looked for an after market from ATI, but they wouldn’t build one for me. They said all their BMW pulley/balancer orders go thru VAC, who told me “no” when I asked if they could make a 4.6 balancer. had a pretty good discount on it, and took the first two back with no questions when they both showed up damaged.
Original owner 2002 E53 X5 4.4i to 4.6i swap
1993 Mopar 318 Jeep Grand Cherokee - original owner
2015 V6 Jeep Grand Cherokee - the nice car for my wife
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro

Last edited by Henn28; 03-18-2022 at 09:20 PM.
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