2014 MDX Engine Knock
#1
2014 MDX Engine Knock
Hello everyone I wanted to throw this out here for discussion.I have a 2014 Mdx tech awd with 38,000 miles that I bought new.I really like the car and the way it drives.It has good power and I have no complaints.The other day I noticed a pretty loud knocking sound in the engine when in gear and warmed up between 500-1200 rpm.It doesn't do it when cold or in neutral.It was very noticable to me and I was concerned. It went away at normal speeds,or I just couldn't hear it.Took it in to see what it was and the tech said,after comparing it with another MDX and checking a few things that it was normal.I just wanted to see if anyone had heard the same knock in their car and what they did.
#7
Then you may want to check the suspension like control arms, cv joints, ball joints, etc for loose/worn components. Or even have an indie shop check it out because EVERYTHING IS NORMAL at Acura dealers 99% of the time...
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#14
If you could record your sound i can compare but just a description alone is too hard to say yes i have it. I've used both 5w20 and 0w20 and now 5w30 so it didn't be a difference really. If you've run low and your bearings are shot that would be another story but that tech said it was "normal" so i don't think it was bearings
#17
6G TLX-S
OP, does it sound like some pebbles rattling in a metal can ?
#19
Racer
Engine knock is generally one of only a couple of things. Piston slap of bad bearings.. bad bearings could be caused by any number of things including wrong grwde of oil. Piston slap is a sign of worn rings or very heavy block wear.
#23
This sound is heard in gear only!Do you hear these in neutral?
#24
Based on the rpm and the warm engine condition, I would suspect the VCM system kicking in. Mine gets obnoxious at lower speeds after warm-up. It is worse if you have loose or missing clips on the plastic shroud over the radiator.
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