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Old 08-07-2010, 07:29 PM
Argess Argess is offline
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How to tell if SBC has 1 or 2 pice rear seal

I have a Mercruiser 260 HP engine (basically a SBC 350) in my boat that seems to have a leaky oil pan, no doubt from all the years being around salt water. It's a 1985....right around when they changed them, so other visual clues such as valve covers and dipstick locations might not confirm the seal type being used.

To change the pan, I need to jury rig a hoist and lift the engine out of the hold and change the pan with the engine suspended in the air, so it would be nice to already have the pan at that point, rather than to leave the engine suspended for a week or two while the correct pan is on order.

I think I can see under the pan with a mirror and trouble-light, but am unsure what to look for at the back end of the pan. Is any of the rear bearing cap exposed on one and not the other? I've got a feeling nothing is obvious unless I had two engines to compare.
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