Question about 1999 Ford Explorer

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You can hear the the timing chain rubbing against metal when you rev heavy

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It may be the chain tentioner(?) spring is stuck or too slack making the chain slap against the housing

Posted on Aug 25, 2010

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I have a rattling noise on my 2.8 mitsubhishi pajero 1997 model.the noise is at the front of the engine. i checked the timing chain and guides they look ok and tight.when i rev the noise get quiet but when...


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Tons of possibilities. If it has enough mileage (or a problem) and a timing chain (4.0L has a chain, 4.7L has a belt, not sure on the 5.7L), you can get an odd rattle from a timing chain tensioner that has gone south (revving creates more centrifugal force, pushing the chain outward, and you hear either link noise due to slackness or the chain slapping against something). That, or a much more serious valve train issue, should be the worst possibilities, but I would start by getting one of those 'stethoscope' tools and having someone rev the engine up and down while you (very carefully!) place it on different parts until you isolate the source of the noise. I wouldn't let that go for very long, though. If it is in the valve train or timing chain, it can get more expensive in a hurry. Hope not, for your sake.

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check that the wear pads on the tensions are not worn through to metal mount
for chains to rub on each means that a shaft will have excessive axial movement( worn thrust washes )

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Sounds like your differential maybe destroyed.Take the cover off and look for metal pieces in the bottom of housing or looseness in the gears.

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SOUNDS LIKE U HAVE METALLIC PADS. TOTALLY NORMAL. THE PADS WILL BED IN AND THE SCREECHING SOUND WILL GO AWAY. SUGGEST U GET A BETTER NON-METALLIC PAD INSTALLED IF U DON'T WANT TO HEAR SCREECHING NOISES EVERY TIME THE PADS GET WET. I'M ALSO ASSUMING U HAVE NO MORE THAN 50,000 MILES ON THE PADS AND THE PADS AND DISCS ARE IN GOOD SHAPE.

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Rubbing metal noise coming from timing chain.


Dear Rubbing Noise,
The correct and long term repair for this would be to replace the chain and timing chain tensioners.Only saying to replace the chain seeing as how it's been slapping on metal, where it's not supposed to.This will cure your problem and you will be a happy camper, HOPE I COULD HELP!!!

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check your rearbushing on that rear suspenison.
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