05 FX4 creaking / scratching noise at low speed
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Cross-Country
Joined: Apr 2007
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From: Öland - Sweden
05 FX4 creaking / scratching noise at low speed
Bought a 2005 FX4 recently, 107k miles, engine and transmission working smooth and quiet. Changed oil in engine, transmission, transfer case and rear axle, filter in engine and transmission, the oil I drained still looked pretty good.
At take-off or when going slowly the truck sometimes makes a really weird creaking/scratching/rattling noise. It appears to come from underneath the truck, I only can hear it when driving close to a building or taking off besides another vehicle with windows down (noise is reflected by building or other vehicle). There is no jerk, the truck drives normal but the noise is really weird (and alarming?).
Any suggestions on where to look?
Thx /Ekkehard
At take-off or when going slowly the truck sometimes makes a really weird creaking/scratching/rattling noise. It appears to come from underneath the truck, I only can hear it when driving close to a building or taking off besides another vehicle with windows down (noise is reflected by building or other vehicle). There is no jerk, the truck drives normal but the noise is really weird (and alarming?).
Any suggestions on where to look?
Thx /Ekkehard
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Cross-Country
Joined: Apr 2007
Posts: 51
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From: Öland - Sweden
Could be 1200 rpm, never would have thought about that, my fear was the transmission going south... I listened to the noise while my wife was driving, it sounded pretty serious to me, can small solenoids make that much noise? Do you happen to have the bulletin #?
Thx //Ekkehard
Thx //Ekkehard
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Joined: Oct 2010
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From: Henderson, KY
Unplug them on each valve cover and drive it down the road and see if you notice it. The sound it makes is almost like a slapping sound... it really sounds awful. However I had my cam phasers, vct solenoids sensors, tensioners, and lash adjusters all replaced on mine and the sound was still there. My buddies 08 makes that sound and it has 15k on it.
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From: Henderson, KY
Senior User
Joined: Oct 2010
Posts: 377
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From: Henderson, KY
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.
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.
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