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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

Metallic Slapping noise under heavy accel

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Old 12-25-2016, 06:44 AM
  #11  
05 5.4l 3v s.crew lariat
 
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Default pull the oil pan

Best test for this noise . Look for guide pieces and shiny grains from aluminum timing cover . When she starts whipping the chain eats the timing cover . Never hurts to clean pan out .
Old 02-23-2017, 11:57 AM
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Default Just following up

I recently did my timing job about 1 month ago and to my surprise, I didn't find any broken guides only a loose chain on the pass side from a failed tensioner. I will upload a video and show you guys how loose it is. Anyways back to the noise, I still have no idea what it could of been? Idler pulley is bad and possibly the belt tensioner also. Maybe that could be the cause of the noise.
Old 02-23-2017, 12:23 PM
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05 5.4l 3v s.crew lariat
 
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Default Wow it seems like you take a lot of chances with this motor.

Forgive me I know about budgets, but when you are inside the timing cover you have to go out on limb and do her right .
Sounds like you did not do the final fix by svares. If I were you I would use the old metal tensioners and of course all new oem parts . Those metal tensioners are ratcheting giving better tension when oil low .
That slap just sounds like the chain eating the timing cover. Aluminum grains will be in oil pan . The whipping chains are usually a sign of a broken guide and low oil pressure from a blown tensioner .
I hardly ever punch my engine, it causes stress and I need her there for work . My ear is tuned to that engine and I feel it when I overload it so the speed comes down to get to the job slower .
I hope you are lucky and its outside the timing cover . That clutch fan sounds scary .
Old 02-24-2017, 07:53 AM
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It hasn't happened since the rebuild. Might have been a misunderstanding. I was just suggesting that the idler pulley and belt tensiner could have been the cause of that noise.



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