|
It is going to cause a bit of extra wear to the clutch mechanism, but many have good luck with bump starting. Skill helps lower the mechanical impact.
Perhaps the worst impact is on the synchronizers. When the engine is dead (cluster gear & individual gear stationary) and the third motion shaft (output shaft) is turning at several thousand RPMs, there is very high relative speed between the synchronizer/dog clutch parts, therefore there is a lot of synchronizer stress. Apparently modern synchronizers at up to the stress in many cases.
I have an AT, but I'd do some bump starting if I had a MT. I just wouldn't be doing it unless there was a clear and convincing fuel savings. That would include long coasts, and long downhills. It may make more sense to restart with the starter, since that is an "external" component and less expensive to replace. In addition, using the starter would allow for double clutching which would lower synchronizer wear considerably. I don't know of any actual data, but clearly a lot of extra shifts/clutch cycles is clearly outside the designers intent. JMHO
|