Getting back to the technicalities......
Proabably the two most active people pursuing this RMS problem is myself and a very knowlegable chap called
Tool Pants whom you may have seen postings from on other Porsche forums. While I am seen as the one doing the
most moaning and groaning, Jeff by all accounts has added much more technical input and he is a veritable encyclopedia
on the subject. His pasttime hobby is taking his Boxster apart and putting it back together again for the benefit of us all.
He has witnessed first hand the replacement of the RMS (probably several times).
In my previous postings in regards to the cause and technical details of the RMS failure and the mechanisms
and tools used to measure the crankshaft seal bore tolerance, I have shown pictures of the RMS, the engine
with the RMS fitted and the Mandrel tool used to check and fit it. These pictures were taken by Tool Pants.
Why am I telling you this? Well, I have been reading a recent thread on renntech.org and Tool Pants
has made a very interesting observation in regards to the tool used to check the tolerance. Here is his
quote:
This measuring mandrel is turning out to be much about nothing.
I talked to 2 mechanics I know at my local dealer. They have never had a car where the mandrel did not fit, yet seal leaks continued after passing the mandrel test.
I will use Jean's 2000 Boxster as an example as his car is at my local dealer now.
He had 4 seal replacements over the years, and the 4th seal leaked as well. The last 2 replacements were done after the new tools, including the mandrel, had come out. I know my dealer has them because they put on the tech session where we were shown them. Jean knows about them because he was at the tech session.
So the fact the mandrel fits means nothing. They have gone back to hand measuring like in the past.
By the time of the 4th seal leak Jean's car was out of warranty. In July they gave up on more seal replacements and put in a rebuilt engine. The rebuilt engine had a vibration problem, and the oil filter was loaded with metal. So after 800 miles the rebuilt engine was replaced with another rebuilt engine. Same problem.
So now he gets a new engine. It is supposed to be here from Germany by the end of the week.
So it seems that this mandrel tool, which the UK OPC's are only just getting used to and are being told to
use when changing the RMS is likely to be a red herring.
I suggest that if you have to have your RMS replaced, demand that the engineer uses the mandrel and
also performs a second measurement with a feeler gauge to ensure it is within specified tolerance.
Finally, another poster (Tom 77) on rennlist.com mentioned another interesting feature of this RMS problem:
The sad thing about all this is that the engine you have in there will never stop leaking. My theory is that the real problem is that the case, which keeps the steel crankshaft carrier in place, will never hold the carrier in place and it will keep on moving unless you take the engine out and re-fasten the 2 halves. The last fix at the dealer (I was watching this as he was doing it) is the replacement of the bolts as well as the seal at the back of the engine. I watched the tech unscrew one of the bolts without a tool, that's how loose they get. unfortunarly, replacing the back screws will not tighten the rest of the case, so that car will be back. I had my engine replace at 11k miles and now have 24 k miles and not a drop. I was leaking from 6k miles on with the first engine. Obviously they tightened things properly on the remanufactured engines.
Tool pants has mentioned this problem with the casing bolts as I have in previous postings here. I find this last
post very concerning.