PeachParts Mercedes-Benz Forum - Which Motor Should I Swap Into My 300SDL?

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Quote:

Originally Posted by moon161 (Post 3767944)

Those numbers, for me, are not worth taking the head off if there's no evidence that the head is blown or cracked. If it runs smooth and doesn't overheat, make smoke or steam I'd watch it for a while and count my lucky stars.

x2!

Sixto
98 E320s sedan and wagon

Quote:

Originally Posted by ah-kay (Post 3767899)

Btw: The compression number looks excellent. I would do it again to confirm and don't squirt any oil in the cylinder prior.

On an engine with worn rings, there is already a lot of oil on the cylinder walls, adding more only serves to reduce combustion chamber volume / calculated compression ratio so pressures will come up.

Quote:

Originally Posted by t walgamuth (Post 3767864)

Excellent compression results. Why do you need a leak down again?

It is possible to have good compression numbers and a combustion chamber leak to coolant. A leak down tells much more about an engines health than a compression test.