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2015 Explorer XLT with New Engine Noise/Grind/Rattle

jgnixon89

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Joined
December 26, 2024
Messages
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City, State
Houston, Texas
Year, Model & Trim Level
2015 Explorer XLT 3.5L V6
I recently noticed a new engine noise that is most noticeable at idle and lower speeds; however, I'm sure it continues at higher speeds as well because the intensity of the noise grows with increased throttle while parked or in neutral and (most noticeably) in reverse. Truthfully, the noise is actually at its loudest and becomes more of a harsh rattle sound when I reverse the vehicle up my driveway and have to give the throttle a good press to make it over the exaggerated lip on the end of my driveway.

Previous work completed on the vehicle within the last 6-16 months (oldest to most recent):

I replaced the serpentine belt and alternator-attached tensioner within the last 35k miles.

The intake manifold was replaced about 18k miles ago because my little one knocked it off the garage desk (and cracked it of course) when I was replacing the spark plugs and throttle body.

Roughly 12k miles ago, the front and rear suspension was replaced (including the lower control arms and all sway bar links), as well as nearly all of steering linkage. The brake rotors and pads were replaced at the same time.

I'd like to think it's not the belt or a pulley gone bad in 35k miles. Though it's pretty much the only thing I haven't replaced, I'm also hoping it's not a CV axle simply because I would have replaced them when I had everything off during the suspension overhaul.

Any thoughts or suggestions on how to best diagnose the exact cause of the noise is greatly appreciated!
 



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Welcome to the Forum. :wave:
I'm not sure what might be causing the noise but how many miles are on the engine? That info may help someone who has an idea.
Have you eliminated the exhaust system?

Peter
 






Welcome to the Forum. :wave:
I'm not sure what might be causing the noise but how many miles are on the engine? That info may help someone who has an idea.
Have you eliminated the exhaust system?

Peter
Hey Peter! Thanks for the welcome and for getting back to me.

Engine has 182k miles. Exhaust system is good. That was my initial thought, too, but I've found no exhaust leaks.

Cheers,
Jay.
 






Check your trans mount.

Mine was making similar noise and it was trashed.

A new mount and mine is back to being a smooth ride.
 






Check your trans mount.

Mine was making similar noise and it was trashed.

A new mount and mine is back to being a smooth ride.
Agreed with the motor mounts. I replaced mine at 300k and they were so worn out. Engine is buttery smooth now!!
 






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