thompsj0784

Hey guys I've been trying to search for a straight answer on here and the mustang forms, but haven't had any luck. I'm looking at picking up an 05 f150 with a 5.4 that has a rod knock. I thought no big deal those motors are a dime a dozen ahould be able to pick one up for 500 bucks. Well I'm wrong its more like 1800 in Michigan. So the 2 valave motors can be picked up pretty cheap. I know they bolt up but is there any clearance issues with running a 3 valve head on a 2 valve shortblock. I've also read that there was a change over in the 5.4 blocks in 01 if I remeber correctly. I know I would have to swap the timing cover and valve covers over. Any help would be greatly appreciated.

Z7What

IIRC the 2V block would work with 4V heads but not 3V heads.

Wayne

SteedaGT

iTrader: (2)

I know the 2v heads work on a 3v shortblock so I’d assume the same in reverse, but I can’t be 100% sure. Bolt lengths and what not may be the tricky parts, but you may get lucky and it’s all the same. Ford doesn’t like to change stuff too much.

nrivera04

I also recall there being timing cover issues between the 2 motors.

Eric Kleven

Should be fine, I don't think they changed the blocks any between any of the motors, but you'll have to treat it like a short-block swap and change front and valve covers, and probably oil pans. probably also oil pump.