351w help
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351w help
I have 1990 f250 that needs a new engine. We got the old engine removed and have bought a replacement engine. We bought a 1994 351w. I need a run down on how to swap all needed parts from the 1990 351w to the new 94 351w. We do not have much help on this project and any help from any of you guys would be appreciated.
-Ryan
-Ryan
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From: Ottawa, Ontario
These two motors are nearly identical so this will be pretty easy, the major difference is with the camshaft.. roller in the '94 and flat tappet in the '90. That's important because the drive gear on the distributor is different and the distributors are wired differently because of the location of the TFI modules on these trucks. So you will need to put the '94 drive gear on the '90 distributor and put that in the '94 motor, and swap the lower intake manifolds because there is no place for the IAT sensor in the '94. Next issue is the flywheel or flexplate, if both motors had the same transmissions you can use whatever one is in better shape, if not or if the trans for the '94 is unknown use the one from your truck. Lastly do not under any circumstances try to use any wiring that comes with the '94, strip it all off and throw it away and use only what is in your '90 truck. With all that done this motor is plug and play.
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Thanks. I am pretty sure both trucks have the same transmission as both fly wheel\ flexplates are the exact same. So pretty much all I need to do is distributer, distributer gear, and lower intake? And of course the wiring.
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Yes. I found the location of the sensor on a picture off of Google
Thread Starter
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Senior User
Joined: Jun 2013
Posts: 255
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These two motors are nearly identical so this will be pretty easy, the major difference is with the camshaft.. roller in the '94 and flat tappet in the '90. That's important because the drive gear on the distributor is different and the distributors are wired differently because of the location of the TFI modules on these trucks. So you will need to put the '94 drive gear on the '90 distributor and put that in the '94 motor, and swap the lower intake manifolds because there is no place for the IAT sensor in the '94. Next issue is the flywheel or flexplate, if both motors had the same transmissions you can use whatever one is in better shape, if not or if the trans for the '94 is unknown use the one from your truck. Lastly do not under any circumstances try to use any wiring that comes with the '94, strip it all off and throw it away and use only what is in your '90 truck. With all that done this motor is plug and play.
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1990-f250
1987 - 1996 F150 & Larger F-Series Trucks
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Jul 9, 2013 08:26 PM