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Name that noise!! Engine tick

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Old 10-21-2015, 11:20 PM
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RRTEC
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Default Name that noise!! Engine tick

Background:

Been making this noise since I got it randomly, also seems worse in colder weather.

Only at idle, and only after sitting at idle for a while.. Passenger side.

Goes away with throttle addition.

Car runs really great, so smoke no oil or coolant loss.

Oil was changed 2k miles ago with 0w40. And filter dissection has been clean since I bought it. 102k miles on it now.

http://youtu.be/OsCn_j0c5wI

Thoughts?

Loose spark plug?
Oil too thin?
Water pump?
Exploding metal death even though it's been fine for 12k miles and hasn't gotten worse or showing any negative effects other than sounding like a jalopy?
Old 10-21-2015, 11:29 PM
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911 carrera blue
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You got more than a 100K miles of fun, time to say good bye!!!

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Old 10-22-2015, 12:11 AM
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Ahsai
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Check for loose spark plugs. If not, my next guess is bank 2 bore scoring. I hope I'm wrong though. It's not difficult to inspect the cylinders with a borescope.
Old 10-22-2015, 09:01 AM
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AWDGuy
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that is a familiar sound

Hope I'm wrong but you'll want to boroscope that as soon as you can.
Old 10-22-2015, 09:52 AM
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RRTEC
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Ordered a boroscope camera. Interesting development though. Added seafoam to the oil, after a drive home from work and lots of idling the noise is gone... So spark plugs seem less likely.

Will start researching bore scoring.
Old 10-22-2015, 10:32 AM
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RRTEC
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After 1/4 can of seafoam.

http://youtu.be/ypRvx8PHLlc
Old 10-22-2015, 10:42 AM
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ChicagoSpeed996
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Interesting! Sounds like seafoam did some magic?? Report back to see how it does.
Old 10-22-2015, 11:39 AM
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Paul Waterloo
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I could of sworn that sounds more like Marvel Mystery Oil!

Great news! Let us know how long it lasts.
Old 10-22-2015, 12:53 PM
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Ahsai
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Really hope it's just a sticky lifter but the sound is quite solid and dull in the video..could be just the recording though.
More importantly the rhythm of the knocking is close to one per ignition (i.e., ~6-8 times/sec @ idle).

Another forum member "Van" has a cylinder scoring and this is his video

Last edited by Ahsai; 10-22-2015 at 02:35 PM.
Old 10-22-2015, 01:12 PM
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AWDGuy
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wow. amazing difference in sound.

hopefully it was just a stuck lifter.
Old 10-22-2015, 01:19 PM
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Schnell Gelb
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If you read all the threads for 'ticking' the consensus is bad,real bad.
I did read most of them because I had that issue. I was convinced it was lifters until the tick became a knock.....I hope your Seafoam works.
Old 10-22-2015, 01:29 PM
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Byprodriver
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Originally Posted by Schnell Gelb
If you read all the threads for 'ticking' the consensus is bad,real bad.
I did read most of them because I had that issue. I was convinced it was lifters until the tick became a knock.....I hope your Seafoam works.
Seafoam is working to throughly clean entire engine & deposit all the crap into the lifters where it will stay due to the tight clearance design .

Change oil A.S.A.P.!!
Old 10-22-2015, 01:47 PM
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Ahsai
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Lifter = filter

Originally Posted by Byprodriver
Seafoam is working to throughly clean entire engine & deposit all the crap into the lifters where it will stay due to the tight clearance design .

Change oil A.S.A.P.!!
Old 10-22-2015, 02:00 PM
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Ben Z
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Originally Posted by Ahsai
Really hope it's just a sticky lifter but the sound is quite solid and dull in the video..could be just the recording though.
More importantly the rhythm of the knocking is close to one per ignition (i.e., ~6-8 times/sec @ idle). If it's a valve, the rhythm should be much slower (half the frequency).
Doesn't 8 times/sec equate to 480 times/min, roughly half the crank speed at idle?
Old 10-22-2015, 02:11 PM
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Ben Z
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Originally Posted by RRTEC
Background:

Been making this noise since I got it randomly, also seems worse in colder weather.

Only at idle, and only after sitting at idle for a while.. Passenger side.

Goes away with throttle addition.

Car runs really great, no smoke no oil or coolant loss.

Oil was changed 2k miles ago with 0w40. And filter dissection has been clean since I bought it. 102k miles on it now.

http://youtu.be/OsCn_j0c5wI

Thoughts?

Loose spark plug?
Oil too thin?
Water pump?
Exploding metal death even though it's been fine for 12k miles and hasn't gotten worse or showing any negative effects other than sounding like a jalopy?
If this were my car I would just keep driving it until one or the other of those statements I highlighted was no longer true. As the cure for bore scoring is a new engine or complete rebuild, and even a complete valve job is pushing 6 grand unless you DIY, I would drive mine until it became much worse. I would risk the far-fetched chance of damaging something badly enough to incur additional core charges.


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