Engine swap

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Dryer Dave

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As we all know, the 1st and 2cd Expedition had the 5.4L 2 valve motor. Has there been any discussion about swapping out the original motor for a different, more reliable one? Just curious as to what the overriding opinions have been. TIA
 

kep5niner

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The general consensus is the juice ain’t worth the squeeze. I did put a re-man’d 5.4 2v in my ‘03 EB last summer, and the replacement engine supposedly addressed all of the known issues with that vintage 5.4 (timing chain guides, phasers, oil pump, etc).
 

whtbronco

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What engine would be more reliable that would be a reasonably easy swap? Now if you're talking about going old school like a 351W or 460 in that case I would agree, but I'd be concerned about keeping it street legal. I couldn't get through VA state inspection with and old school engine, :-(.
 

texasscot

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As we all know, the 1st and 2cd Expedition had the 5.4L 2 valve motor. Has there been any discussion about swapping out the original motor for a different, more reliable one? Just curious as to what the overriding opinions have been. TIA
I always thought the 3v was the less reliable motor. It has the troubling cam phasers, but I don’t think the 2v does.
 

Broncoholic

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As we all know, the 1st and 2cd Expedition had the 5.4L 2 valve motor. Has there been any discussion about swapping out the original motor for a different, more reliable one? Just curious as to what the overriding opinions have been. TIA
More reliable? I have 175k miles in the Florida heat with my 2003 5.4 2 valve. I've never had to touch the internals. Seems pretty reliable to me.
 

texasscot

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More reliable? I have 175k miles in the Florida heat with my 2003 5.4 2 valve. I've never had to touch the internals. Seems pretty reliable to me.
i have 272K miles on mine, only engine intervention was inlet manifold (in addition to usual plugs n coils). i'm going to do the chain and guides soon, all parts sourced and waiting for quieter travel schedule.
 

Broncoholic

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i have 272K miles on mine, only engine intervention was inlet manifold (in addition to usual plugs n coils). i'm going to do the chain and guides soon, all parts sourced and waiting for quieter travel schedule.
Yes, I've replaced my intake manifold also... and the routine maintenance including plugs and coils, but the engine internals have been solid. And I've seen many like you with 200k+ or 300k+ on the original internals, so I don't agree with the question of reliability.
 
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1998 EB 5.4 has 280000. 2000 EB 5.4 has 450000, 2003 EB 5.4 has 120000. coil packs belts plugs and hoses the only things replaced on the older two. Can't agree that its unreliable.
 

proftomda

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I have the 5.4 2 valve and three valve and I can assure you that the two valve engine is the most reliable engine that has been installed in any expedition. The only issue possibly is spark plug blowout. Keep your 5.4 2 valve, change all every 5000 miles, replace the spark plugs and torque accordingly and enjoy reliability that does not exist with vehicles built today.
 

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