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Top End Knock - Very Loud when Cold
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TGonnion
Novice
Apr 12, 2016, 5:40 PM
Post #1 of 7
(1654 views)
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Top End Knock - Very Loud when Cold
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My wife has a 2002 Chevrolet Malibu with a 3.1L V6 Engine, The "Right Side" or backside cylinders have been making a very loud knock for a while now and it keeps getting worse, I've tried using Lucas Oil Stabilizer and changing her oil every 1500 miles thinking maybe she just needed to clean it out some.
I mean this vehicle has been a decent car, 210k on it, but I was talking to my mechanic buddy, he said its most likely one of a few things, he suggested a second opinion,
1: Camshaft
2: Rocker's need adjusting
3: Cam-Position Sensor
Its not running any codes already had the computer read, and mainly just looking for an opinion as to where to start looking for the issue, before i send it to a shop and pay out the ass for a diagnosis
Wal-Mart: Auto Care Center Service Manager
2005 FORD CROWN VICTORIA POLICE INTERCEPTOR
2001 HONDA CIVIC EX
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 12, 2016, 5:49 PM
Post #2 of 7
(1643 views)
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Re: Top End Knock - Very Loud when Cold
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Can you record the noise and post it to a video hosting site and then post the link in here? Hearing the noise might help give us a better idea what your hearing.
You can cross off adjusting the rockers. They are non adjustable. Don't think I have ever seen a camshaft position sensor make noise on those.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Apr 12, 2016, 5:52 PM)
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TGonnion
Novice
Apr 12, 2016, 6:08 PM
Post #3 of 7
(1637 views)
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Re: Top End Knock - Very Loud when Cold
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Yeah I can record it tomorrow afternoon and post it up on youtube with a link here.
Wal-Mart: Auto Care Center Service Manager
2005 FORD CROWN VICTORIA POLICE INTERCEPTOR
2001 HONDA CIVIC EX
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TGonnion
Novice
Apr 13, 2016, 6:01 PM
Post #4 of 7
(1609 views)
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Re: Top End Knock - Very Loud when Cold
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Here you go Discrete, a link to a video of the sound, I wasnt really trying to get good visuals but its coming from the backside of the motor.
https://www.youtube.com/watch?v=P63K9zGUf9w
Wal-Mart: Auto Care Center Service Manager
2005 FORD CROWN VICTORIA POLICE INTERCEPTOR
2001 HONDA CIVIC EX
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 13, 2016, 6:47 PM
Post #5 of 7
(1604 views)
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Re: Top End Knock - Very Loud when Cold
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Does this go away as the engine warms up?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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TGonnion
Novice
Apr 14, 2016, 7:13 AM
Post #6 of 7
(1589 views)
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Re: Top End Knock - Very Loud when Cold
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It quiets down a lot but it's still there
Wal-Mart: Auto Care Center Service Manager
2005 FORD CROWN VICTORIA POLICE INTERCEPTOR
2001 HONDA CIVIC EX
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 15, 2016, 8:06 AM
Post #7 of 7
(1570 views)
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Re: Top End Knock - Very Loud when Cold
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It could be a case of excessive piston slap or a wrist pin issue. Usually bearing or valve train noises don't go away or lessen as the engine warms. With the mileage this thing has, probably wouldn't hurt to start pricing engines or possibly a new vehicle if the noise keeps getting worse.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Apr 15, 2016, 8:09 AM)
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