Ford Mondeo tdci - mondeo tdci whine, DMF, Pulley, other?

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Wed 16 Jan 2013 11:08
Ford Mondeo tdci - mondeo tdci whine, DMF, Pulley, other? - harrogate big vern

Advice appreciated. I have a 2.0 TDCI Zetec, which is a 10 plate, thus warranty expires in May.

Past couple of months it has developed a whine when accelerating steadily, eg around 2000 revs. It will also do it when stationary and out of gear if I depress the throttle. Will do it when coasting downhill with no throttle as well, particularly if in third gear for instance and engine braking seems to be happening.

If anyone can advise what may be the cause I'd be grateful. I have had it into dealership who, as far as I can tell, plugged in the diagnostic and said no fault code so no fault. "Computer says no!" Concerned may end up with huge bill just out of warranty time!

The whine is reasonably high pitched at times. Not entirely consistent, and the whine itself is enough to be a significant irritation in it's own right.

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Tue 10 Jun 2014 10:11
Ford Mondeo tdci - mondeo tdci whine, DMF, Pulley, other? - JimJod

I had a similar whine and read all the forums which convinced me it was power steering related. I looked into the power steering reservoir and saw the fluid circulating into it with air bubbles entrained. This is bad news for any hydraulic system and the air entrained in the oil has to be removed which is not easy. I jacked the front of the car up and with the wheels of the ground turned the steering from lock to lock which caused the reservoir to overflow! By repeating this with the engine off it removed most of the air in the system then I ran the car as normal and the whine dissapeared. The reservoir level must never fall below min otherwise air will be entrained and the level rises to appear normal!

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