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Discussion Starter · #1 ·
Bought my 2007 F-150 3 weeks ago. 115K. We had a slight warm up in the weather and it became noticable that when fully warmed up at idle the engine starts making what sounds like valves clattering. To say the least I am very concerned.
 

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2013 F-150 XLT 4WD with 5L
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First things first, when was the last oil change completed? Old oil breaks down in viscosity and is more readily known when the temps are up and noisy lifters can often be remedied with a simple oil change.

If it is your valve train that is at fault then it could be a number of things that can cause that kind of noise.
 

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2013 F-150 XLT 4WD with 5L
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Chances are then you may have a faulty oil pump and this needs to be checked immediately before any further damage is caused. If your mechanic saw the drop in pressure he should have told you this already as the noise is oil starved components.
 
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