Pls help: RMS vs IMS failure?

[jhandy]

I understand the difference, I just dont know in which direction does the oil flow.

hang with me for a second:

If it works like this: the oil from the motor, goes through the bearing, and then to the rear seal, then to the garage floor... more oil on ther floor would be good in that the old motor oil is not blocked from "passing through" and does not back up inside the bearing.

OR

the oil goes to the real seal area, and then pools, then seeps into the bearing, and into the tube, and back out the tube pass the bearing. In that case the rear seal leak would have not much to do with failure.

OR

Am I wrong in both areas?


Also why does porsche not just recall the cars and fix the issues and thier reputation by doing the retrofit as a recall.

[Cloudsurfer]

Originally Posted by jhandy

I understand the difference, I just dont know in which direction does the oil flow.

hang with me for a second:

If it works like this: the oil from the motor, goes through the bearing, and then to the rear seal, then to the garage floor... more oil on ther floor would be good in that the old motor oil is not blocked from "passing through" and does not back up inside the bearing.

OR

the oil goes to the real seal area, and then pools, then seeps into the bearing, and into the tube, and back out the tube pass the bearing. In that case the rear seal leak would have not much to do with failure.

OR

Am I wrong in both areas?


Also why does porsche not just recall the cars and fix the issues and thier reputation by doing the retrofit as a recall.

Yes. Two completely separate things.

Now, as to why Porsche doesn't do what Mazda did with the RX8 motors (where they gave the early cars, which had a higher chance of blowing up, a complementary 100k mile warranty) or something similar is beyond me, though I understand their mindset unfortunately. You would think that the company would be concerned with bad PR and pissed off owners who will never buy the marque again, but it's not quite that simple.

All companies know their buyer demographics, and who buys their products new, and second-hand. As such, Porsche knows (and I'd say at better than 95% correctly) that the people who buy used Boxsters will never buy a new Porsche, so really, despite how pissed off you are that your car blew up and that you'll never buy a Porsche again, they haven't lost a sale, as you weren't going to buy a new car anyway (aside from selling parts, they could care less who buys the cars used). Sad but true.

This also explains why there are many documented cases of original owners getting goodwill replacement motors (after the warranty expired). That's because this guy DID buy the car new, and likely will again, so they don't want to piss him off by saying "sorry, out of warranty, but here's your $15k bill to fix your car."

[Cloudsurfer]

This picture may help you. This is the view from the rear of the 1-3 case half, during assembly with the bearing carrier (which holds the crank) inserted. To the left is the rear of the Intermediate Shaft (where you can see the end of the bearing behind the flange), and to the right is the back of the crank. The gap between the crank and the case half is where the RMS seal goes.

As you can see, the RMS and the IMS are completely separate, and do not share oil in any way.

[jhandy]

OH!!!!!!!!!!!!!!!!!

Got it it now. I thought that the Rear main seal was in front of the IMS. I did not realize that they where in two different spots. Thank you. I had the RMS replaced four times and the oil looked like it was coming from the IMS area, I guess it was pooling in the bell housing.

[Jake Raby]

I understand the difference, I just dont know in which direction does the oil flow.

Oil doesn't flow to either, it is delivered via splash.

hang with me for a second:

If it works like this: the oil from the motor, goes through the bearing

Which bearing??

and then to the rear seal, then to the garage floor... more oil on ther floor would be good in that the old motor oil is not blocked from "passing through" and does not back up inside the bearing

No... You are associating the seals.. They are not associated at all. Two different components..

OR

the oil goes to the real seal area, and then pools, then seeps into the bearing, and into the tube, and back out the tube pass the bearing. In that case the rear seal leak would have not much to do with failure.

Nope... The oil that gets into the IMS isn't coming from the RMS.

Also why does porsche not just recall the cars and fix the issues and thier reputation by doing the retrofit as a recall.

That would be admission that a problem actually exists..

Deny, Deny, Deny...