omc 5.7 swap to 5.8

[jlevac]

Hi Folks, my 1988 fourwinns 245 omc 5.7L is dead and I found an 1990 omc 5.8L. Is it possible to do the swap easily?
Thanks

 

[Don S]

Re: omc 5.7 swap to 5.8

As long as you have EVERYTHING for the 5.8 it should be fairly simple. When I say everything, that means exhaust system up to the Y pipe, the flywheel cover, the coupler, and everything on the engine.

 

[TilliamWe]

Re: omc 5.7 swap to 5.8

It may be "easy", but it's not a good idea at all.

 

[a70eliminator]

Re: omc 5.7 swap to 5.8

It may be "easy", but it's not a good idea at all.

You say this beause there are twice if not three or four 5.7's for every 5.8?
Or being OMC he'd be better off swapping the whole deal?
All the above?

 

[Lou C]

Re: omc 5.7 swap to 5.8

You're going from a Chevy 5.7 to a Ford 5.8, the engine mounts might be in a slightly different place, the OE exhaust may not mate up the to the Chevy Y pipe (check the parts #s to see if it's the same part), in other words, it is doable if you have everything, but not as easy as dropping in another 5.7. Keep im mind that marinized parts are a lot easier to get for Chevy engines than for Fords.

 

[jlevac]

Re: omc 5.7 swap to 5.8

thanks guys. I think i might have found a 5.7 at a good price.
Anything I should look for to know if I'm not getting a lemon?

 

[TilliamWe]

Re: omc 5.7 swap to 5.8

You say this beause there are twice if not three or four 5.7's for every 5.8?
Or being OMC he'd be better off swapping the whole deal?
All the above?

Exactly.

And for the reasons Lou mentions.

If you are buying a used engine, you would want to do a proper compression test on it at the least. Oil sample testing would be good too.