Intermittent engine chatter/rattle 4.2
#1
Intermittent engine chatter/rattle 4.2
Have a 99 ford f150 with intermittent engine chatter . This only occurs when the engine is warm. This video took me 15 minutes of idling to finally get the noise to come . In the winter months it will take well over an hour to get it to make this noise. It increases a little bit with acceleration and in and out of gear until about 1500 rpms then it dissapears or I cant hear it anymore due to road noise. Any ideas what it is and how to fix ? Run 15-40 ha! Threw some lucas in it and it didn't help much. Has been doing this for 5k + miles seems like its mostly on passenger side or front of engine.
#7
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#8
Thanks for the reply, Can i remove the valve covers without pulling the engine ?
#11
Thanks for letting us know what the problem was. On my 70 Mustang V8, I had an alternator that hummed in drive and reverse before stepping on the gas when it went away. I almost got a transmission rebuilt under warranty because I, the shop foreman, and a couple of mechanics diagnosed it as the transmission. But, before they started they got an old timer mechanic to look at it and he found out it was the alternator.