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997.2 3.8 Engine Failure

 
Old 12-25-2018, 04:22 PM
  #31  
bgoetz
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Originally Posted by rw229 View Post
The 997.2 DFI engine does not have an IMS.


Sorry my bad totally overlooked that aspect!! Disregard, lol

Deffinately something happening though, maybe a spun bearing, but it is odd the UOA would be perfect leading up to it and to spin a bearing at that mileage for no apparent reason is also odd.

Last edited by bgoetz; 12-25-2018 at 04:37 PM.
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Old 12-25-2018, 05:47 PM
  #32  
Charles Navarro
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Originally Posted by Bruce In Philly View Post
2009 C2S 130k miles

Thanx for posting Charles, Ummm just curious, why do you have so many cores around? What kind of 997.2 failures do you see.

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We have been building up a core bank for RND the last few years.

The main failures points we see are worn guides, scored cylinders, and stretched chains. When tracked, excessive oil temperatures will slowly roast the main and rod bearings. Engines don't loose pressure as the on-demand pump makes up for increased clearances. We've seen a few oil pump sprocket failures in our shop where the engine looses oil pressure at high rpm.

Like I've said on past threads, the 9A1 is a pretty remarkable engine and kept cool and well maintained, they are very robust and can actually wear out.
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Old 12-25-2018, 06:19 PM
  #33  
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OP, if you do send in another oil sample, you'll need to advise lab of the particles you're concerned about. Standard ICP analysis (Spectroscopy) is not going to see particles larger than 5-8 microns - much smaller than visible with naked eye. You'll need to ask lab for PQ (or PQI) evaluation.
https://www.machinerylubrication.com...analysis-tests
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Old 12-25-2018, 09:50 PM
  #34  
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Ugh. Sorry to hear but all of this is speculation at this point. DO NOT CRANK THE MOTOR. If anything is wrong thatís the worst thing you can do.

Call Joey at G Design and get it on a flatbed. He is elbow deep in 9A1s every week. Mostly cayman 3.6 but same engine basically.

Hell first pull the water pump. If itís fine youíre looking at a few grand for a teardown but thatís where youíre at at this point.
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Old 12-25-2018, 10:21 PM
  #35  
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Are the black pieces plastic or metal. It's possible the tensioner paddle guide has failed and the chain is rubbing on the metal tensioner paddle itself, which is aluminum, and that's the source of metal bits you see. If so, I don't believe the guides are replaceable without disassembling the motor.
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Old 12-26-2018, 12:09 AM
  #36  
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Tensioner may be gone this allows slap tick noise. It happened to me.
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Old 12-26-2018, 01:48 PM
  #37  
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Thanks for all your input guys, really appreciate it. Its hard to say if the black specs are plastic or metal i actually didnt have time to really investigate the day i pulled the filter. I saved everything and will go back to look at it better when i get a chance. My plan is to take an oil sample and send it for analysis and see what they come up with.

What type of metal would come up in analysis if it was cylinder walls, or rod bearings, or the chain eating into the block?

I really really hope i dont need a full on rebuild but if i do I will be reaching out to you Charles and we can discuss some options.

I will keep you guys updated as soon as i find out anything.
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Old 12-26-2018, 01:50 PM
  #38  
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Mumbles How much did that run you or was it covered under warranty? Do you know how many labor hours was the job at least? Thank you
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Old 12-26-2018, 02:04 PM
  #39  
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Results from the previous 2 UOAs

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Old 12-26-2018, 02:19 PM
  #40  
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i already miss her ;,,,(

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Old 12-26-2018, 02:36 PM
  #41  
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Did you cut open the oil filters from your prior oil analyses and inspect for metal flecks?
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Old 12-26-2018, 02:47 PM
  #42  
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Yes never found anything at all.
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Old 12-26-2018, 02:51 PM
  #43  
Charles Navarro
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Cylinders will be aluminum and silicon.

Rod or main bearings will be tin and copper.

Cam or lifter will be iron.

Feel free to PM me the UOA and I'd be happy to look at it. I've seen literally thousands of UOA reports for Porsche engines, so it's a good bet if there is something elevated, we'll get a good idea of what failed.
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Old 12-26-2018, 02:53 PM
  #44  
Charles Navarro
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Nothing is jumping out to me on that last UOA you posted.

Did the engine have any ticking noises prior to the failure?
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Old 12-26-2018, 03:08 PM
  #45  
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The engine did have a slight ticking sound ever since i bought it with 66k miles. But ive heard that sound on many Porsches and it sounded completely normal to me. This is probably the only video i have of the car and you can kind of hear it before i rev it up

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