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Bottom End Rattling

00Xplorer

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'00 XLS
I bought a 2000 explorer xls v6 about 3 months ago...about 3 weeks ago a strange rattle started coming from the bottom end somewhere. It appears about 15 seconds after a cold startup and never goes away. It does not get louder or faster with RPM.. also i can barely hear the rattle when its in drive or reverse..its louder in park or neutral..I checked the entire exhaust and i know its not that...it sounds like it is coming from the front of the oil pan or close to it...let me know if anybody knows....thanks
 



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swetrid

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1999 Eddie Bauer
4.0L sohc or OHV engine?
 












swetrid

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OHV engines had what they call a carbon knock. It builds up carbon on the pistons and causes almost like a knock/ bearing noise at idle. Ford had you decarbon the engine and then road test at 4000rpm for like 5 miles. They told you to drive at least 4000 rpm once everytime you drive vehicle to help stop the carbon buildup. The noise won't hurt anything.
 






00Xplorer

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i think thiss is a diffrent sound...its a rattle and dont sound like the bearings...kinda like marbles bouncing around...and i was told it was not the oil pump
 






swetrid

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1999 Eddie Bauer
Thats it! They list the noise as marbles back in the Ford literature, I just couldn't remember the word.
 


















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