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Mezger engine noise

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Old 03-19-2017, 01:26 AM
  #31
jungt
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Thanks Macster, for a detailed synopsis. Much appreciated.

BTW, regarding the T6 reformulation. The latest spec sheet I have from the Shell website shows that it still has the Porsche API: SJ or SH specification?

John
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Old 03-19-2017, 09:58 AM
  #32
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I uploaded engine noise video to YouTube. My first time. Hope it works.

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Old 03-19-2017, 10:01 AM
  #33
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BTW, this is Cold Engine Noise.

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Old 03-19-2017, 06:18 PM
  #34
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Sounds unusually smooth to me
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Old 03-20-2017, 12:20 AM
  #35
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I would love to ask this owner, on the noise.

http://www.roadandtrack.com/car-cult...0-miles-on-it/

You Can Own this Porsche 996 Turbo With an Absurd 590,000 Miles
Roll the dice with this 996 Turbo that's been to the moon and back.
Coming across a high-mileage car for sale can be a blessing and a curse for potential buyers. On one hand, more miles equals more wear and greater chance of the car breaking. But on the other hand, if the mileage is high enough, it could mean vital wear items have been replaced or otherwise remedied. In the case of this 590,000-mile Porsche 996 Turbo, we think it's the latter.

For sale on Craigslist in Minneapolis with an asking price of $17,995, this 2002 911 Turbo doesn't seem too out of the ordinary at first. The paint is clear and shines evenly, the interior is in good enough condition, and the wheels look free of curb rash. It's only when you get to the picture of the gauge cluster above do you see the numbers on the digital odometer: 590,000 miles on the dot.

According to the short listing description, the Tiptronic-equipped 996 has been fitted with a FabSpeed exhaust and upgraded factory turbochargers. It even claims the car makes 545-horsepower and 545 lb.-ft. of torque thanks to the changes, despite the mileage.

Porsche Club of America featured the half-million mile Turbo back in June of 2015 when it had 575,000 miles on the clock, and noted it went through no less than 124 tires during its lifetime—15 sets of front summers, 22 sets of rear summers, and 11 sets of front winters, and 14 sets of rear winters. That's, uh, a lot of tires.

The article also mentions the fuel pump, water pump, a cooling fan, the battery (twice), xenon headlamps, the alternator, and the wing deployer mechanism as being replaced under the original owner's tenure. Frequent 800-mile weekend trips from Decorah, Iowa to places like Denver, Minneapolis, and Chicago are the culprit behind the impressive mileage.

If you're not into a car that's seen more distance than Apollo 13, this 125,000-mile silver example might be more your thing. Either way, you can't go wrong with that Mezger engine.

via Jalopnik
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Old 03-20-2017, 12:33 AM
  #36
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Thanks Nzo, I feel better. I think this car will outlive me.

John
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Old 04-05-2017, 11:09 AM
  #37
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Here is my rattler for reference. I record the sound 3 times per year to see if it changes but it doesn't. So I just enjoy the performance and don't worry about it. The only thing that still bugs me is why the oil pump makes a racket when the IMS bearings are worn...

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Old 04-05-2017, 11:36 AM
  #38
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WOTever, yes...I believe your car has an authentic Mezger engine
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Old 04-05-2017, 02:03 PM
  #39
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Originally Posted by WOTever View Post
Here is my rattler for reference.
What oil weight are you running?
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Old 04-05-2017, 03:04 PM
  #40
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Mobil1 5W50. Interestingly the change from 0W40 had no noticeable impact on the noise, idle oil pressure went up as expected but nothing else...
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Old 04-05-2017, 03:51 PM
  #41
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Originally Posted by WOTever View Post
Mobil1 5W50.
Do you have a LWFW?
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Old 04-05-2017, 04:11 PM
  #42
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Originally Posted by Dock View Post
Do you have a LWFW?
I don't think so, car should be stock. Pressing the clutch has no effect and noise is only present when the engine/oil is warm. No noise when cold.
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Old 04-05-2017, 04:25 PM
  #43
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Originally Posted by WOTever View Post
I don't think so, car should be stock. Pressing the clutch has no effect and noise is only present when the engine/oil is warm. No noise when cold.
I think your noise is probably normal.

As a data point, I have a LWFW, and my take (based on your video) is that my noise level is lower than yours. The LWFW contributes to the idle noise coming from my engine. Of course your video may be exaggerating the noise.
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Old 04-06-2017, 01:17 PM
  #44
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Originally Posted by jungt View Post
Thanks Macster, for a detailed synopsis. Much appreciated.

BTW, regarding the T6 reformulation. The latest spec sheet I have from the Shell website shows that it still has the Porsche API: SJ or SH specification?

John
Sorry I missed your question.

Porsche doesn't go by the API ratings. If the bottle doesn't have "A40" on it somewhere it is not approved by Porsche.

My info is the only Shell oils on the Porsche approval list are Shell Helix oils.

While the approval certification has expired in this document I believe a more recent approval document would have these oils still approved. But you need to get an up to date list of approved oils to be sure.

See attached...

Oh, sorry about the rotation. The orientation looked ok in Preview.

Added: I obtained a newer Approved Oils List. This document is dated Jan 19, 2016. Only 3 Shell Helix oils are listed: HX8C 0W-40 (EU), Ultra 0W-40 (WW, except USA & CAN), and Ultra 5W-40 (EU, CEE, Latin America, Asia, Oceania, USA, E-RUS, AF). And all 3 of these has their approval expire "31.10.2016".
Attached Images
File Type: pdf
Shell Approved Oils 1.pdf (105.3 KB, 9 views)
File Type: pdf
Shell Approved Oils 2.pdf (66.2 KB, 9 views)

Last edited by Macster; 04-06-2017 at 03:27 PM. Reason: Added "Added..."
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Old 04-06-2017, 01:22 PM
  #45
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Not sure how you get "The only thing that still bugs me is why the oil pump makes a racket when the IMS bearings are worn..." from the audio of that clip.

The engine sounds normal to me. The "IMS bearings" are plain bearings and would be hard pressed to manifest any wear. The wear would almost certainly require a break down in oil or an under supply of oil and the main/rod bearings being plain bearings and way more stress (pressure) than the IMS (layshaft) bearings would be manifesting signs of excessive wear/clearance. Hot idle oil pressure would likely be quite low and you'd hear "rod knock".
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