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Old 06-12-2005, 10:04 PM
george_hannah's Avatar
The Diesel Guy
Join Date: May 2004
Location: Chadds Ford, PA
Posts: 82
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?



'81 300TD (White) 225,000 miles
'85 300SD (Burgandy) 239,000 miles
'86 300SDL (Silver) 340,000 miles
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Old 06-13-2005, 12:00 AM
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Join Date: Nov 2001
Location: North Central Kentucky
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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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