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Oh man! Me thinks you have the dreaded scored cylinder syndrome. Stand by...
Someone chime in if I'm wrong
I wouldn't say you're wrong - I'd say we can't tell based on a video.
OP - go to Harbor Freight, buy their $3.99 mechanic's stethoscope and put it to use. Track down the location the noise you hear is coming from and post that.
In general - Utube cell-phone videos suck big time for diagnostics of noises.
How long did it sit? Check oil level. Let it idle for a few mins.
It only sat over the weekend. I did check the oil level and it is fine. I changed the oil about 3 weeks ago. It gets a little quiter after a little bit but does not go away. Kind of sounds like a hydraulic lifter not building pressure.
Originally Posted by deilenberger
I wouldn't say you're wrong - I'd say we can't tell based on a video.
OP - go to Harbor Freight, buy their $3.99 mechanic's stethoscope and put it to use. Track down the location the noise you hear is coming from and post that.
In general - Utube cell-phone videos suck big time for diagnostics of noises.
It is thought to be a cam adjuster. It stopped making the noise once I got it to the repair shop.
Noisy hydraulic lifter? Entirely possible if the oil change intervals have been extended... used to be pretty common on US V8's - there were some "top-end" lubricants made (light oil) that would let them break free of the crud keeping them from working correctly.
It might be worth doing a few short-interval oil changes..
I let the oil change go out 10,000 miles (from my normal 5000 miles) before I changed it this last time. It had only been 500 miles on the new oil change when this noise started. Hopefully I will never hear that noise again. I never grove it after it started making the noise except the 4 miles to the mechanic.
If the noise starts up again, pop off the black V8 engine cover right up front and check your Vapor Canister Purge Valve. Few months back mine started making a rapping noise that would last several minutes, disappear and then come back several minutes later. Next morning I removed the gas cap and a rush of air came out, noise never came back. Only thing I can think of is we had a drastic temperature swing from 30s to 90s in about 1 day.
If it's the valve, it'll be obvious when you get the cover off. You'll be able to feel it and it may even be hopping around.
If the noise starts up again, pop off the black V8 engine cover right up front and check your Vapor Canister Purge Valve. Few months back mine started making a rapping noise that would last several minutes, disappear and then come back several minutes later. Next morning I removed the gas cap and a rush of air came out, noise never came back. Only thing I can think of is we had a drastic temperature swing from 30s to 90s in about 1 day.
If it's the valve, it'll be obvious when you get the cover off. You'll be able to feel it and it may even be hopping around.
Come to find out I also have three coils that are intermittently throwing a check engine light. I will take a look at that valve while I'm changing coils and plugs. Thanks for the input! (Since it is National Imoji day)
06-27-2017, 06:46 PM
06 Cayenne S engine noise
(Since it is National Imoji day)