millo777
MB Enthusiast
- Joined
- Mar 9, 2011
- Messages
- 1,250
- Location
- Swansea, Dubai, Riyadh
- Car
- 1997 W140 S600L/2003 S211 320cdi
I've just ordered a new viscous fan coupling for my W124 and need some help on how to fit it.
For ref, GSF stock Sachs or Febi Bilstein at 35 +vat and ecp stock OTSA at 52 + vat. Having never heard of OTSA I went with the sachs options.
From what I can see it "should" be fairly simple. Loosen the belt tensioner, remove the belt, undo the nut holding the fan in place, remove and replace.
However, nothing is ever that simple with this car.
Without the special tool, is there any established way of stopping the fan pulley turning when trying to undo the nut on the fan?
Also, is the nut a regular or left hand thread? from looking at other threads, it looks like the diesel engines have a left hand thread and the petrol (which I have) use regular threads. Is that correct? I'd hate to spend 30 minutes tightening the nut before figuring out I'd made a ****** of the whole job.
Thanks in advance,
James.
For ref, GSF stock Sachs or Febi Bilstein at 35 +vat and ecp stock OTSA at 52 + vat. Having never heard of OTSA I went with the sachs options.
From what I can see it "should" be fairly simple. Loosen the belt tensioner, remove the belt, undo the nut holding the fan in place, remove and replace.
However, nothing is ever that simple with this car.
Without the special tool, is there any established way of stopping the fan pulley turning when trying to undo the nut on the fan?
Also, is the nut a regular or left hand thread? from looking at other threads, it looks like the diesel engines have a left hand thread and the petrol (which I have) use regular threads. Is that correct? I'd hate to spend 30 minutes tightening the nut before figuring out I'd made a ****** of the whole job.
Thanks in advance,
James.