|
The IMS is a real problem. I examined the failed one in my son's car and the pressure side of the inner race (which does not move) had spalling failure from the pressure. The car had 142,000 miles. It is possible that a slowly driven car has more static pressure on the chain tensioners than one that stays near the redline. That would explain the pressure area failure if the engine was a low mileage one. At 142,000 spirited miles, it was just worn out.
I'm currently working on a method to change these 2006 and later bearings without disassembly of the engine.
I believe that a vibration like noise/chatter upon cold start up, something like an a/c clutch slipping sound, is a warning of impending failure. It stops after about 10-2=30 seconds, but still worried me. Just my educated guess.
__________________
1986, '87,'88 928S4, 2006 Cayman S Cabluey, 2006 Cayman S "Burn Notice"
|