Same RMS for 2010
#4
Still plays with cars.
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Neither my car nor my wife's RS leaks. Both cars are track driven frequently. A friend who made a garage queen out of his RS has leaks and complains. My 2007 RS (just sold) had 51,000 KM, his, less than 8,000. This makes me believe Porsche when they say to drive the car frequently. It has worked for us.
#5
So why are some worse than others, and why are the leaks not totally consistant with the "drive less, leak more" theory? I can think of numerous reasons why since the seal is meant to seal under vacuum. Probably some of the seals simply retain their shape better based on the original manufacturing. All may seal properly when driven and under vacuum, but when the motor is shut off and there is no vaccum, then the seal goes back to its original manufactured cured shape. So those that are a bit more warped will leak more when sitting vs. one that has virtually no warp or none at all.
This is just my theory, please punch holes in it because I know my thinking is off somewhere and what I believe about RMS's and their material and manufacturing processses and possible results could be way off from actual reality. I'm just thinking out loud.
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#8
I'd rather have the engine running as intended and a few more ponies with no leak. If other car manufacturers can do it, Porsche should be able to as well, especially on a $100k+ car. JMHO.
#12
Porsche punched weep hole in the RMS to accommodate crankcase leaking/pressure relief point... with that in mind, and engine operating under vacuum even with the weep hole built into the RMS, once the engine is stopped it will loose its vacuum thru the RMS seal hole along with some engine oil that was splashed on to it under operation... I think the logical remedy for curing the re equalization of crankcase pressure to atmospheric pressure would be to have an ONE WAY VENT valve on top of the engine (like the one in their turbo engines) away from the oil passages thereby preventing the RMS leak... and of course the RMS vent hole would have to be removed...
just some random thoughts from engineering days gone by....
#13
Anyway, the builder was adamant about his proprietary engine case venting which not only increased power but added longevity to his masterpiece. Probably unrelated to the contemporary Porsche engine, but I felt like typing.
#14
I don't have a GT3 yet but I am trying to learn as much about it as I can. =)
Having said that, if the car is not driven frequently, just running the engine for a few min every couple of days will do the trick to prevent this infamous RMS issue?
Having said that, if the car is not driven frequently, just running the engine for a few min every couple of days will do the trick to prevent this infamous RMS issue?
#15
Crankcase vacuum design is a matter of pollution avoidance I believe. Decades ago car companies designed their crankcase ventilation to breath over board and now it is all recirculated to avoid these oily fumes to escape into the atmosphere.