hi the othere day i was changeing my ac compreser and noticed that my block said it was a 5.4 but the vin said its a 4.6 and the sticker on the vavle cover said its also a 4.6 so whats the deal

 

What vehicle? Are you the original owner? Any ideas if the engine was replaced at any time in the vehicle's life?

 

no iam the second and from what i can tell it mite have been rebuilt onces
not to sure

 

Editing what I said as I was wrong.

 

the othere thing is its a f150 2wdrrive the tranny 4r70w the vin says 4.6 the engine sticker says 4.6 but the stuff on the right side says it a 5.4 also the vale covers are 14 bolt count

 

14bolt means Windsor. 11 Bolt is Romeo.

 

Can't help you on this but just to show what can happen, at one time I had a 79 Olds Cutlas with a 260 ci diesel. Cylinders went bad and the short block was replaced under warranty. They put in a 350 ci diesel short block, using as many original parts as possible. I don't know how many pieces interchange between the 4.6 and 5.4 but if there are any casting numbers on the block, heads etc they might give a lead on what you have.

Good luck

Paul

 

I thought the only difference in the 4.6/5.4 was the longer piston stroke that gave it the more cubic inches. I'm no expert but I wonder if someone slapped the wrong sticker on at the factory. You never know...

 

well its could happen not to worryed iam going to replace it some time soon the head gasket on the left and right banks leak oil

 

replacing motor because of head gasket leak? And yes the 5.4 and 4.6 share the same block and other parts. The 5.4 has bigger heads to allow for a longer stroke.

 

4.6 and 5.4 share most of the enternal parts. the blocks are not the same, they are the same bore but the 5.4 blocks deck is a little taller cause the 5.4 has more stroke. which puts the intake spacing further apart, which wont allow a 4.6 intake to go on a 5.4. pretty sure cranks and pistons are the same , rods are longer on the 5.4.

 

thanks for the info replacing engine for taping and knocking 256000 on it was a farm truck also leaking from crank sral and oil pan also