Quote:
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Originally Posted by blue2000s
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"when starting the engine with the clutch pedal down, it's putting amount of force on the crank, and since the engine was off, there has not been any oil flow or oil pressure at all, possibly resulting in excessive wear on the thrust bearing. "
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When starting there is minimal oil pressure while cranking, but any good oil will leave a microscopic film wherever it was. Otherwise we'd be replacing rings, bearings pistons cams etc all the time!
But I submit that the 'damage' to the thrust bearing caused by the short time it takes to fire the engine, is far worse when you sit at a traffic light with the car in gear and the clutch disengaged.
That's why when sitting a light I never have the car in gear, the clutch is engaged and my foot isn't resting on the pedal. When the light changes yellow for the oncoming traffic I slide into gear and am ready for the green.
Back in the day, British cars used a carbon release bearing, rather than a true bearing with balls in it. People used to come into the shop for a new clutch when all it needed was a new carbon bearing. In all my cars. over 40 of them, I have never replaced a clutch, release bearing or pressure plate or thrust bearing using the method I described above.
My 2 cents!
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