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Message: I don't remember my source of info but I believe that green material is from the IMS bearing....
Changed By: MarcW
Change Date: December 16, 2010 05:23PM
I don't remember my source of info but I believe that green material is from the IMS bearing....
Change Date: December 16, 2010 05:23PM
I don't remember my source of info but I believe that green material is from the IMS bearing....
seal.
Too late for you perhaps but when something is believed to be worth tearing into the oil filter for the oil filter housing's oil should be poured into a clean drain pan for examination. What one is looking for is not only big bits but some metal sheen that can -- if the IMS bearing going bad -- that can be from the balls and bearing races.
However, there are a couple of things that suggest it may not be a going bad IMS bearing. One is you didn't not report any noise from that area. Were the bearing bad enough to have lost its bearing seal material I would think the bearing would be noisy.
Two is the the stuck VarioCam actuator code. A going bad IMS bearing would not normally -- under any reasonable scenario I can think of -- cause a stuck actuator. One possible unreasonable scenario would be if the IMS bearing bits (seal, race, fine metal particles) have found a way into the clean oil pressure side and have fouled oen or both actuators.
Absent any scary noises from the engine IIRC with the engine running at idle the tech can using the Porsche System Tester 2 (PST2) command each actuator to activate then deactivate and from the other readings know if the actuators are really working.
In fact he can read the two camshaft position sensors and from this know if one or both actuators are in the wrong phase: active when it should be inactive or vice versa.
Added: Forgot to mentione one or both camshaft position sensors may be bad too. If a sensor is bad it can signal the actuator is stuck in one position or the other when of course it is not. There are tests to eliminate the camshaft position sensors from the list of suspects.
Sincerely,
MarcW.
Too late for you perhaps but when something is believed to be worth tearing into the oil filter for the oil filter housing's oil should be poured into a clean drain pan for examination. What one is looking for is not only big bits but some metal sheen that can -- if the IMS bearing going bad -- that can be from the balls and bearing races.
However, there are a couple of things that suggest it may not be a going bad IMS bearing. One is you didn't not report any noise from that area. Were the bearing bad enough to have lost its bearing seal material I would think the bearing would be noisy.
Two is the the stuck VarioCam actuator code. A going bad IMS bearing would not normally -- under any reasonable scenario I can think of -- cause a stuck actuator. One possible unreasonable scenario would be if the IMS bearing bits (seal, race, fine metal particles) have found a way into the clean oil pressure side and have fouled oen or both actuators.
Absent any scary noises from the engine IIRC with the engine running at idle the tech can using the Porsche System Tester 2 (PST2) command each actuator to activate then deactivate and from the other readings know if the actuators are really working.
In fact he can read the two camshaft position sensors and from this know if one or both actuators are in the wrong phase: active when it should be inactive or vice versa.
Added: Forgot to mentione one or both camshaft position sensors may be bad too. If a sensor is bad it can signal the actuator is stuck in one position or the other when of course it is not. There are tests to eliminate the camshaft position sensors from the list of suspects.
Sincerely,
MarcW.
Original Message
Author: MarcWDate: December 16, 2010 05:18PM
I don't remember my source of info but I believe that green material is from the IMS bearing....
seal.
Too late for you perhaps but when something is believed to be worth tearing into the oil filter for the oil filter housing's oil should be poured into a clean drain pan for examination. What one is looking for is not only big bits but some metal sheen that can -- if the IMS bearing going bad -- that can be from the balls and bearing races.
However, there are a couple of things that suggest it may not be a going bad IMS bearing. One is you didn't not report any noise from that area. Were the bearing bad enough to have lost its bearing seal material I would think the bearing would be noisy.
Two is the the stuck VarioCam actuator code. A going bad IMS bearing would not normally -- under any reasonable scenario I can think of -- cause a stuck actuator. One possible unreasonable scenario would be if the IMS bearing bits (seal, race, fine metal particles) have found a way into the clean oil pressure side and have fouled oen or both actuators.
Absent any scary noises from the engine IIRC with the engine running at idle the tech can using the Porsche System Tester 2 (PST2) command each actuator to activate then deactivate and from the other readings know if the actuators are really working.
In fact he can read the two camshaft position sensors and from this know if one or both actuators are in the wrong phase: active when it should be inactive or vice versa.
Sincerely,
MarcW.
Too late for you perhaps but when something is believed to be worth tearing into the oil filter for the oil filter housing's oil should be poured into a clean drain pan for examination. What one is looking for is not only big bits but some metal sheen that can -- if the IMS bearing going bad -- that can be from the balls and bearing races.
However, there are a couple of things that suggest it may not be a going bad IMS bearing. One is you didn't not report any noise from that area. Were the bearing bad enough to have lost its bearing seal material I would think the bearing would be noisy.
Two is the the stuck VarioCam actuator code. A going bad IMS bearing would not normally -- under any reasonable scenario I can think of -- cause a stuck actuator. One possible unreasonable scenario would be if the IMS bearing bits (seal, race, fine metal particles) have found a way into the clean oil pressure side and have fouled oen or both actuators.
Absent any scary noises from the engine IIRC with the engine running at idle the tech can using the Porsche System Tester 2 (PST2) command each actuator to activate then deactivate and from the other readings know if the actuators are really working.
In fact he can read the two camshaft position sensors and from this know if one or both actuators are in the wrong phase: active when it should be inactive or vice versa.
Sincerely,
MarcW.