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Old 06-12-2005, 10:04 PM
george_hannah's Avatar
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Join Date: May 2004
Location: Chadds Ford, PA
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Compression reading for a 4.5

Hi Friends,

I'm looking at a 1980 450SL to purchase. What should the compression reading range be for a good motor?

Thanks,

-George

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Old 06-13-2005, 12:00 AM
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Manual is kinda funny. It say min: 125 for normal, 110 for low. Max difference between cylinders is 22psi. This is for 8 rotations.

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