Alright mechanics... rattling 5.4L

[Goldeneagle]

I've got a 2000 F150 and had the motor rebuilt about 90,000 miles ago. It has started rattling a while back and is driving me nuts! I pulled the belt off and it still does it so it's not anything belt driven. It's not a knocking sound like a rod or something, just a rattling noise. It does it sitting still in park so it doesn't have to be under a load. It runs fine with plenty of power. Ya'll got any ideas?

[Storm]

Take the beer can out from under your seat and it should stop.

[Toolman]

Timing chain tensioners are weak.

[M16]

Sounds like the varible cam timing. Unplug the solenoids and see if it goes away. This is a very common problem with this engine.

[Decker]

Cam phasers are bad or its a chain tensioner. We deal with this at work all the time.

[trophy8]

I've got a 2000 F150.Ya'll got any ideas?

i have a bunch of ideas. they all include a cliff, a bunch of ammo and some tannerite

[texanatc]

Another idea, cheap too, pcv valve , passenger side of engine on valve cover

[huntingfanatic]

I can tell you new plugs and coils won't help. Mine as well as several others I know do this exact same thing. Can't find much on the ford forums

[huntingfanatic]

BTW.... They all started doing this after an oil change.

[Keg]

take the beer can out from under your seat and it should stop.

lol!

[Goldeneagle]

Sounds like the varible cam timing. Unplug the solenoids and see if it goes away. This is a very common problem with this engine.

Where are these?

Cam phasers are bad or its a chain tensioner. We deal with this at work all the time.

Is this the same as above?

[M16]

The vct sensors are on top of each valve cover

[Bowhunter9790]

Go to a mechanic

[M16]

Here is a tsb.

21574 4.6L 3V/ 5.4L 3V ENGINE TICK/RATTLE FROM VCT 800-1200 RPM - DO NOT ATTEMPT SERVICE
2009-2010 F-150 WITH 4.6L 3V, 2005-2010 F150 WITH 5.4L 3V,2005-2010 MUSTANG WITH 4,6L 3V, 2005-2010 F250, F350 WITH 5.4L3V, 2006-2010 EXPLORER/MOUNTAINEER WITH 4.6L 3V ENGINE, 2007-2010 SPORT TRAC WITH 4.6L 3V ENGINE, AND 2005-2011 EXPEDITIONS AND NAVIGATORS WITH 5.4L 3V ENGINES. SOME CUSTOMERS MAY BE CONCERNED WITH TICK/RATTLE NOISES FROM THE VARIABLE CAM TIMING (VCT) ON LIGHT TIP-IN ACCEL BETWEEN 800-1200 RPM. THIS CONDITION MAY BE MOST NOTICEABLE OPERATING VEHICLE IN CONFINED AREAS SUCH AS A DRIVE-THRU. THE NOISE IS ELIMINATED WHEN VCT SOLENOIDS ARE UNPLUGGED. THIS CONDITION SHOULD BE CONSIDERED A NORMAL CHARACTERISTIC OF THE ENGINE. DO NOT ATTEMPT ENGINE REPAIRS TO CHANGE THIS NORMAL CONDITION. THIS CONDITION DOES NOT AFFECT PERFORMANCE OR DURABILITY OF THE ENGINE.

[blacksunshine]

Cam phasers are bad or its a chain tensioner. We deal with this at work all the time.

^^^^

Cam chains are prolly loose and slapping around.....biznatch to get to but pretty simple fix