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Discussion Starter #1
502 and 454s are for sale on EBay that have been used in boats. I would think they would work in cars, provided they don't have special fittings such as coolant passages in the front of the heads. Has anyone used one?
 

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Coach,
The biggest problem with used marine engines is the fact that about 90% of them have had "raw" water pumped through them thier entire lives. The stuff is about a corrosive as anything you have ever seen. It seems like the worst ones are those run in "brackish" water...not all salt, for instance the Cheasapeake bay. Once that stuff is in an engine, it does not go away, it actually seems to corrode worse once it is drained out. I think the salts get into the metal. Soooo... unless you have proof that the engine was run with a closed cooling system with antifreeze...I would pass on them unless they are REAL cheap.
By the way, other than that, they are really no differnt than the GM crate engines. The cams give a pretty narrow power band, unually up around 5000 rpm.
Just my opinion,

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Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner

[This message has been edited by BillK (edited 09-25-2002).]
 

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Ya know, I asked this same question a while back and I was told that those engines all rotate in REVERSE
My question was only one asked out of sheer curiosity, but the answer I got halped me lose any interest in this type of engine real quick!!!!!
 

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Very few marine engines are reverse rotation now days.

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Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner
 

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Discussion Starter #6
Bill,

Thanks for the good info. Would hot tanking or other cleanup of the block and heads restore them to useful, or are the parts beyond salvation once they've got the brine in them?

Peter
 

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Peter,
We have a state of the art heat cleaning system that bakes the stuff in an oven and then steel shot blast them and the stuff still seems to stay in the metal
I would personally stay away from them. The other thing to keep in mind is that marine engines are run at high rpm, under full load, all the time. The best comparison I have heard is that it is like loading up yuour truck, putting it in high gear, putting your foot on the floor, and driving it up a steep hill that never ends. It is very hard on parts. Not uncommon at all to find cranks with stress cracks etc.

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Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner
 
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