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2001 Ford F-150 Tapping Noise coming from Engine

Tiny
KEITH MAC
  • MEMBER
  • 2001 FORD F-150
  • 4.2L
  • V6
  • 2WD
  • AUTOMATIC
  • 186,000 MILES
I have a loud tapping noise coming from my engine is gets louder and faster when you rev up the engine.
I have replaced all the hyd. Lifters. And then started the truck back up an let it run a few mins to get the oil to mover around and the noise is still there. I have now removed the spark plugs an checked to make sure there is compression by putting my finger over the spark plug hole. I did this because someone said I may have a broken connecting rod.
The odd thing is it was running fine one day and it sat for 4 days when I went to start it the battery was dead so I got a jump it cranked slow and I heard a noise (smell ping noise) like something broke then it started up and had this noise.
I do not know what to check for now PLEASE HELP
Thank You
Keith
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Saturday, November 8th, 2014 AT 11:14 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I t may be a cam lobe is worn out have a local pro check it out as they can give a better opinion. In the meantime remove the fan belt and start truck and see if noise is still there. If not then it's accessory drive like alternator etc.
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Saturday, November 8th, 2014 AT 11:57 AM

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