2004 - 2008 F-150
Sponsored by:
Sponsored by: Real Truck

5.4L 3 valve

Thread Tools
 
Search this Thread
 
Old May 25, 2014 | 10:43 PM
  #1  
www_ca's Avatar
Thread Starter
|
Junior Member
Joined: Apr 2014
Posts: 8
Likes: 0
5.4L 3 valve

Okay, so I'm fairly new to my F150. Dumb question but I'll ask anyways. What exactly does the 3 valve do? How does it work? Why not 2 valve?
 
Reply
Old May 26, 2014 | 05:49 AM
  #2  
05RedFX4's Avatar
Technical Article Contributor
Joined: Mar 2005
Posts: 4,387
Likes: 9
From: OH-IO
Two intake valves, 1 exhaust valve per cylinder. It was ford's answer to bridge the gap performance wise between the 2 valve engines that had a good low end and the 4 valve engines that had a better top end. The 3 valve engine didn't fall on it's face as soon as a 2 valve would, but wasn't a top end screamer either.
 
Reply
Old May 26, 2014 | 04:03 PM
  #3  
VTX1800N1's Avatar
Senior Member
Joined: Nov 2012
Posts: 256
Likes: 1
Ford also added variable valve timing, which produced good low RPM torque (with the cam at full advance) and good high RPM power (retarded the cam 60°). It's also the source, unfortunately, of all the cam phaser problems. Ford should have designed the cam chain tensioners with a steel O-ring groove in both the cylinder head and tensioner, like high-performance head gaskets use. That would have prevented nearly all the cam phaser problems we see today.
 
Reply
Old May 27, 2014 | 02:23 PM
  #4  
www_ca's Avatar
Thread Starter
|
Junior Member
Joined: Apr 2014
Posts: 8
Likes: 0
Thanks guys for the details,
 
Reply
Old May 27, 2014 | 02:39 PM
  #5  
KMAC0694's Avatar
Senior Member
Truck of the Month
Joined: Mar 2013
Posts: 6,677
Likes: 0
From: Houston and College Station, TX
Kid that went to my high school convinced fellow retards that he removed one if the "V"'s (as if 3V meant the whole engine had three V's, and he didn't even know it stood for 3 valve) from his engine, which made it faster. Just by knowing that it's three valves per cylinder will prevent you from being anything like that doofus. Good question.
 
Reply
Old May 28, 2014 | 05:00 PM
  #6  
dbhost's Avatar
Senior Member
Joined: Mar 2007
Posts: 2,275
Likes: 2
From: League City, Texas
Originally Posted by KMAC0694
Kid that went to my high school convinced fellow retards that he removed one if the "V"'s (as if 3V meant the whole engine had three V's, and he didn't even know it stood for 3 valve) from his engine, which made it faster. Just by knowing that it's three valves per cylinder will prevent you from being anything like that doofus. Good question.
For a second there I was thinking your college, being in College station I would be sorely disappointed... Aggies know better than that...
 
Reply
Old May 28, 2014 | 06:20 PM
  #7  
KMAC0694's Avatar
Senior Member
Truck of the Month
Joined: Mar 2013
Posts: 6,677
Likes: 0
From: Houston and College Station, TX
I am an Aggie that's in College Station! That's just a story from back in the day (2 years ago, such a long time ago haha). That kid is at A&M Galveston or another one of the satellites though. Both of his parents are Aggies too
 
Reply




All times are GMT -4. The time now is 01:02 PM.