slight knocking sound
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Senior User
Joined: Dec 2004
Posts: 230
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slight knocking sound
my 84 300I6 has a small knocking sound from the front of the engine. i thought at first either the ac compressor or steering pump was making it, but they are not the problem. i wouldn't think it would be the crank bearings because the engine has only 93000 miles and has had a decently easy life. the knocking increases with rpm but not directly, it lags behind when reving the engine. does anybody have a clue as to what this might be
Eric
Eric
Posting Guru
Joined: May 2004
Posts: 2,223
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From: Billings Montana
I had an 83 F-150 with the 300-6 and I had the same problem. As far as I could tell, it was the timing gears clashing together. I might be wrong, so maybe someone else could tell you different.
Junior User
Joined: Feb 2004
Posts: 87
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From: St.Paul, MN
Make a listening tool out of a piece of broom handle or pine closet rod (pipe works too but it's winter) and hold it tight to your ear and various points on the motor.This will help you locate the source of this noise.
You will be amazed at how this amplifies and isolates the sounds.
Watch the fan cuz ya know the engine has to be running to do this.
You will be amazed at how this amplifies and isolates the sounds.
Watch the fan cuz ya know the engine has to be running to do this.
