5.4 crank question

[zlou363lx]

does anyone know if the stock cranks in f150s/expedition/navigator 5.4 mod motors are forged?

[orangeconv]

Yea there 8 bolt they are. I think its the same as a 8bolt 4.6 also the rods are just longer.

[zlou363lx]

cool. thank you.

[cstreu1026]

From http://www.sullivanperformance.com/yvs450/tech/tech.htm


Crankshafts

DOHC & SOHC Cranks will interchange. Some blocks may require minor block modifications for counter weight clearance when installing a forged crank in a block that previously contained a cast crank. The
most common cranks for 4.6L engines are the nodular cast iron units. They come in both 6 & 8 bolt flywheel configurations. Note that just because a crank has 8 bolts does not mean that it is forged. The
2-valve Windsor engines use both a 6 & 8 bolt flywheel, the Romeo engines use 6. The only factory forged cranks available for the 4.6L DOHC engines are installed in the Cobra. These cranks are manufactured by Gertach in Germany for Ford. Ford Racing Performance Parts (FRPP) offers these cranks for sale under part # M-6303-D46 for 425.00. The correct 8-bolt flywheel for this crank is sold under part # M-6375-G46
for 250.00. This is a billet steel flywheel.
The cranks in the 5.4L DOHC and SOHC engines are also available in cast or forged. Most of the cranks are forged, but not all. The only way to know for certain is to look at the parting line. Thick line for forged, thin line for cast.