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Explorer, Sport Trac, Mountaineer & Aviator 1991-1994, 1995-2001, 2002-2005, 2006-2010 Ford Explorer

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Old 01-22-2010, 07:40 PM
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luthrobediesel luthrobediesel is offline
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Flex Fuel to Non Flex Fuel Engine Swap

03 Exploder 4.0 SOHC vin K flex fuel--timing chain cassetes are in peices. Engine is so sludged up its unbelievable. Plastic peices are everywhere. The chain ate away part of the head. I found one for 600 dollars but the only problem is it is a vin E. Non flex fuel vehicle. Somebody said that EVERYTHING is different on the two engines. Even the block is different they said. They said it would work we would have to change the fuel pump, computer, and wiring harness. I was wondering if anybody can confirm that or knows otherwise. And also, wheres the best place to buy a timing chain kit cause im gonna put one in this used motor to be safe.
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Old 01-24-2010, 02:51 PM
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I guess im on my own on this one. I cant seem to find any info about the differences anywhere on the net. When the engine arrives on monday i will know then. Were gonna pull the valve covers and look at the tensioners and cassetes and pull the oil pan and check for peices on the used engine. If theres any sign of wear, its getting new chains, sprokets, cassetes, and tensioners.
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Old 01-24-2010, 11:35 PM
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It would be nice if you post the info here regarding the differences. And some pix also.
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Old 01-24-2010, 11:54 PM
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The differences between the flex and non-flex engines are probably electronic. The engines should otherwise be very similar if not identical. The reason they have a different engine code is because the EPA requires it.
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Old 01-25-2010, 06:05 PM
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The block casting numbers were diff. But the heads were same number. The diferential pressure feedback sensor was different. Injectors were different part numbers but same color. It took me all day to swap sensors and intakes. Everything that was on the old motor is on the new now. I dont see any reason it wouldnt run unless the relucter wheel on the crank pulley or cam is different. I had to glue the spacer plate on it kept falling off while i was trying to line it up. Ill try again in the morning.
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Old 01-27-2010, 08:00 AM
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Engine swap sucess! Non flex fuel engine will work in flex fuel car. Idk about the internal differences like valves and pistons, but it runs. And smooth! Ill tell them not to put E85 in it.
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Old 01-27-2010, 09:57 AM
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Glad to hear that it worked out for you. I hope it keeps on going good.
Did you take any pix of the differences or the destruction done on the old engine?
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Old 01-27-2010, 09:57 AM
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03, 1997, 2002, 40, block, differences, engine, explorer, flex, ford, fuel, interchange, parts, sport, swap, trac, truck

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