Thanks for the various comments: they provide food for thought.
Pionts: 1) D-m clutch problems may not be widespread or earth-shattering in scale. There may not yet be so much as a groundswell of complaint. But there are distinct rumblings, and they’ve even reached Guardiab Money, who recently had occasion to draw attention to them and the associated cost of repairs. 2) If an unstressed drivetrain in a vehicle running at high road speed is subject to various vibrations for which it's not designed, then the trains in the Mondeo and all the other cars I’ve been happily coasting in for yonks haven’t been any the worse for it. Quite the contrary. When I started cycling it was the thing to ride fixed-wheel, which was all right when racing on the flat. But pedalling downhill at speed? The era of gearwheels and coasting meant we could ride much further faster and still be less tired on a day out.
.*********
From engineering prospective [sic] we carefully monitor the production process and components used at our assembly plants, along with vehicles already in service and replacement parts sold and review quality control processes when required.”
When I bought the car I was not told, nor does the handbook warn, that “the flywheel is affected by heat when the clutch is slipped while driving” to the point that “excess heat” would be generated, apparently irrespective of the degree or duration of slipping, according to FoMoCo, and that this excess heat would damage a seal on some component or other, which then seemingly inevitably causes its lubricant to evaporate and an unspecified bearing to seize, although common sense suggests the flywheel is bound to get hot, particularly in summer, from normal interaction with the clutch plate, and exceedingly so during, say, prolonged high-rev clutch slipping for a hill start with caravan in tow. Hence, if the flywheel/clutch assembly is incapable of dissipating even moderate heat and in consequence the friction material burns off, then the clutch fails with the flywheel seized. But, if there are no known issues with the clutch material used, it follows that it should be as good as e.g. the material on the clutch disk fitted to my Mondeo, whereas it obviously isn’t since the Mondeo clutch hasn’t failed four times in 20000 miles with most of the friction material burnt away − and my driving style is the same for both cars. So, whether the flywheel or the clutch is the basic problem, the combination would seem to be inadequate by comparison with older units, as fitted to previous models. No doubt that explains why (much-cheaper) single-plate conversion kits have been developed – and would they have been if there were no market for them?
Some slipping/heating is inevitable, e.g. when the clutch begins to bite during start-off − and considerable slipping may be necessary to get moving and keep moving in snow/mud. For certain driving conditions one is, of course, advised to start off in second gear and get into as high a gear as possible as soon as possible, which means heavy demands on the clutch and flywheel in terms of load and heat. If the flywheel arrangement on the Focus can’t cope with such requirements it’s not much use, is it?
And, if slipping the clutch is the problem, and I don’t ride the clutch, or slip it for no good reason, the fault lies with the unit fitted – and I must say, after seeing it of the car, it looks a tinny lightweight affair!
|