Knocking

Asked by Lizjorden May 20, 2018 at 01:39 PM about the 1998 Ford F-150 XL Stepside SB

Question type: Maintenance & Repair

Can the shaft cause a knocking noise

3 Answers
25,740

Jorge answered 5 years ago

The crankshaft can cause a knocking noise, actually the noise is made by the rod when it looses "grip" on the shaft. The noise becomes louder as the revolutions of the engine increase; when the engine is cold (morning) the sound will be loud because it takes a moment for the oil pressure to reach the rod bearing, then it will level off. However, other parts of the engine can cause a knocking, or similar noise.

Mark helpful
25,740

Jorge answered 5 years ago

Sorry, if you are referring to the drive shaft, yes, a bad U joint may be the cause of the noise like F_O_R says.

Mark helpful

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