Question about 1999 Ford Expedition
Not much to go with here.
Firstly, check the oil level. Does the vehicle have a history of using oil? Low (or no) oil pressure can cause the bearings to make a heavy knocking sound
Secondly, does the noise only occur only while you are in motion? If there is no noise when sitting still, idling, then probably something in the drive train, other than the engine is the culprit. Now to go further with this thought...do you feel any vibration while driving and hearing the sound? If yes, check your wheel lugs to make sure they're not loose.
I don't like being so vague, but I'm not sure what you're experiencing
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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