Yes that's what I found when I pulled the seal for inspection. I certainly wasn't expecting
what I found. Anybody know what appears to be a patch/repair is in the photo? Installed the new bearing, crankcase pan, RMS, flywheel and clutch today, tranny tomorrow.....can you help me understand why low mileage could have contributed to this failure? I don't get it, but glad I didn't like the feel of my clutch, that's why I went in to try and fix that and found what I found. Probably could have gone around the block a couple more times, you think....... http://986forum.com/forums/uploads02...1610067822.jpg http://986forum.com/forums/uploads02...1610067857.jpg http://986forum.com/forums/uploads02...1610067894.jpg |
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This is from the LN engineering site. "Remember, not driving your car or worst yet, not driving it like Porsche intended can make the problem worse. Although a greatly debated subject, most experts agree that more frequent oil changes with a quality 5w40 motor oil like Driven DT40 every 6 months or 5,000 miles is a good first step. Secondly, actually driving your Porsche more often and avoiding higher gears to keep the revs above 2500-3000 rpm is another good step to take to improve the life of the ball-bearing in the intermediate shaft. Although there is limited data, the general trend is that lower mileage vehicles with infrequent oil changes or driven light-footed (as in run at low speed/engine rpms) are most likely to suffer a failure rather than those cars that are driven hard and well-maintained." |
Like I said bought the car with 9000 miles, it had not been gone into
before this time. The repair history was oil changes and a belt. All done by Barrington Porsche in Illinois. Yeah I’ve read all of Jakes stuff and I can assure you it’s driven Like a Porsche and never “lugged” RPM is kept in the 3k area. |
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This is just a theory that I just came up with, don`t take it for granted :) But for this reason I added a "drain hole" to the IMS where the trapped oil can escape. An additional note: my car had 100k miles and spent 11 years in a garage with the engine seized. The IMSB was original and in a perfect shape. But the oil it was sitting in was black and dirty. |
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http://986forum.com/forums/uploads02...1610130566.jpg The idea is that centrifugal force is constantly pulling oil from the tube through this hole while receiving oil from the crankcase through the open end. |
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Full disclosure: I have not done any such mods to mine, nor have I changed the IMSB. But if I decided to do it, that's the route I'd go. Yes, I'm aware of the DOF from LNE. While it's good, it's not the simplest nor cheapest. Plus, I'm a bit uneasy about having a pressurized external oil hose. My brother had an Audi with an external oil line. Unbeknownst to him, it ruptured and within seconds of the oil light coming on the engine was toast. The oil was pumped out that quickly. |
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Everyone has their own comfort level, and you're certainly not wrong. :cheers: |
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Since everyone is mentioning their 'personal opinion' here is mine (please ignore if you wish..) :p
But having oil 'inside' the IMS shaft (IMHO) could cause imbalance issues, I first saw this 'technique' when I visited the shop that invented this technique Vertex (..?) and has not convinced at all.. . |
Homeoboxster I’m aware oil changes at a dealership wouldn’t.........
My thought is this came right out of the factory with this. A little history I’m 65 retired from CAT after 26 years as a field tech and 4 Years in the office. I am not a Porsche tech and don’t claim to be but I can usually handle what comes up. I say this because I’ve seen some amazing things Come out of factories, I’m not saying the repairs are scrupulous they’re just repairs Professionally done. I should have said has anyone else ever seen this in their motors or is this a one off? Trannys back in, should finish this weekend with my filter adapter and mag Drain plug arriving tomorrow. I’ll let you know |
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http://986forum.com/forums/uploads02...1610161332.jpg Probably no one will shed light on what happened here and when... That bearing cage is another mystery to me.. :confused: Anyways, I wish you no more surprises with the car :cheers: |
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Sorry it’s been longer than intended......
Car seems to be running perfectly. On initial start up I ran it to temp and shut down and cut open filter and it was clean As well as my new magnetic drain plug. New oil and ran it for 50 miles and cut Open filter, it had one very small piece that stuck to a magnet but just one. Installed new filter and am going to drive it 500 miles and recheck it all including Dropping the pan to take a look if all’s clean I’ll run new oil for 1000 miles. I’ll let you know then. And by the way the clutch that started this all, does indeed engage lower now and is smooth as can be on take offs. Yay couldn’t be happier! Also ordered a quickjack 5000slx after all the jacking up I’ve done... gets here Saturday |
Great work, Dave! Congrats!
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Thank you, good or bad I’ll let you know.....but I will welcome all positive thoughts..... thanks
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