Silly question, but need to ask..
12-16-2011, 09:27 PM
#16
RL Technical Advisor
Totally agree. That practice simply dilutes the oil all the faster.
DME is Porsche's term for the Engine Control Unit: it stands for Digital Motor Electronics. Some folks use the term "DME" to refer to the DME relay which can be quite confusing. 
DME is the car's brain, in a sense.
12-16-2011, 10:21 PM
#17
don't worry
It is not good to idle cars for an extended time period, especially air cooled. it is always better to run vehicles through full cold/warm cycles, to run all of the systems through differing revs. It's not like you are going to break anything, it is just adds extra cold starts, burns gas, and contaminates the oil faster.
12-17-2011, 10:04 AM
#18
It is not good to idle cars for an extended time period, especially air cooled. it is always better to run vehicles through full cold/warm cycles, to run all of the systems through differing revs. It's not like you are going to break anything, it is just adds extra cold starts, burns gas, and contaminates the oil faster.
12-18-2011, 03:24 AM
#19
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It is not good to idle cars for an extended time period, especially air cooled. it is always better to run vehicles through full cold/warm cycles, to run all of the systems through differing revs. It's not like you are going to break anything, it is just adds extra cold starts, burns gas, and contaminates the oil faster.
12-18-2011, 10:59 AM
#22
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I had a chat with Steve W. the other day about this crankshaft thrust bearing thing as it relates to starting the car - with the clutch engaged vs. disengaged.
I have always depressed the clutch pedal prior to starting to reduce the load on the battery/starter; will alter my pattern now.
Steve makes good sense here. The crank thrust bearing has little lubrication at cold startup and with the clutch disengaged, the pressure plate forces all of its load directly through it, not good. He tells me that they are seeing bearing failures now with the modern cars which they, some ten to twenty years ago, never saw - a direct result of safety regulations requiring that the clutch is disengaged at start up.
Minor? Perhaps, but just something a guy can do to relieve a simple correctable issue - and a good exercise when one ponders the functions of the system.
I have always depressed the clutch pedal prior to starting to reduce the load on the battery/starter; will alter my pattern now.
Steve makes good sense here. The crank thrust bearing has little lubrication at cold startup and with the clutch disengaged, the pressure plate forces all of its load directly through it, not good. He tells me that they are seeing bearing failures now with the modern cars which they, some ten to twenty years ago, never saw - a direct result of safety regulations requiring that the clutch is disengaged at start up.
Minor? Perhaps, but just something a guy can do to relieve a simple correctable issue - and a good exercise when one ponders the functions of the system.
12-18-2011, 02:51 PM
#23
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Funny you should mention that ...
My buddy with a 1999 996 was asking me about this last week. He got wind of a problem like this with the 1999's, where engines were failing due to some bearing failure, especially those that have been sitting for a while. I had no idea what he was talking about, but it seems like this might be it.
Thanks Kai
My buddy with a 1999 996 was asking me about this last week. He got wind of a problem like this with the 1999's, where engines were failing due to some bearing failure, especially those that have been sitting for a while. I had no idea what he was talking about, but it seems like this might be it.
Thanks Kai
12-18-2011, 06:13 PM
#24
Funny you should mention that ...
My buddy with a 1999 996 was asking me about this last week. He got wind of a problem like this with the 1999's, where engines were failing due to some bearing failure, especially those that have been sitting for a while. I had no idea what he was talking about, but it seems like this might be it.
Thanks Kai
My buddy with a 1999 996 was asking me about this last week. He got wind of a problem like this with the 1999's, where engines were failing due to some bearing failure, especially those that have been sitting for a while. I had no idea what he was talking about, but it seems like this might be it.
Thanks Kai
12-18-2011, 08:04 PM
#26
RL Technical Advisor
Thrust bearings, in this case, generally refer to crankshaft support bearings,...
IMS bearings are found in ALL 911 engines except for the new 9A1 and are generally trouble-free. The only exception have been the ones in the M96-powered 986, 996, 987, & 997.1 cars. That's a totally different discussion.
