This car had a habit of the starter motor not working properly when turning the key to start. Approximately 4 out of 5 attempts would result in a click from the solenoid, but no motor action.  The solenoid was partially engaging, but not sufficiently to allow the main contacts to close and power to be sent to the motor.
This being a Valeo D9R indicated it would not be worn out and a clean up should work.  These starters are very robustly made.
Stripping the motor off was a bit challenging, as this car is automatic and has A/c, so a lot of extra pipework in the way.  Fortunately, though, the FDV is mounted out of the way on an automatic, whereas on a manual, it has to be moved out of the way to give access.
Judging by there being missing bolts, someone has already had a go at this job.
Disconnect the battery as you will be disconnecting the un-fused main feed at the starter. Make as much space round the starter as you can, unbolt the fuel filter from the battery box, remove the rigid plastic air pipe to the intercooler from the turbo (missing bolt), unbolt the starter (the rear bolt is not visible and all are Allen heads on auto's).
 I needed to unbolt the A/c compressor and move it out of the way, which is awkward to reach the upper inner nuts.  Unbolt the lower bolts, jam a  prybar into the space and loosen the upper bolts, then you can lever the compressor upwards and create space for a spanner.
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I removed the starter out of the bottom of the engine bay and stripped the solenoid down and saw the core was covered with a sticky coating, which was indeed causing it to jam.
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Experience has told me that the body of the starter may also have some corrosion reducing the allowable Gnd current, so I stripped the motor unit as well.
For ease of assembly I marked the individual sections so I knew they were clocked correctly.  There is a loose square key, so mark up the recess it fits into  for rapid re-build.
The brighter white marker to the left in this image is the keyway, the other two are indicators for section matching.
This starter has been used for 102,000 miles and has only very minor wear.
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Stripping, cleaning the solenoid and motor, wire brushing and lapping together the sections, coating with copper grease to stop corrosion and rebuilding has effected a 100% working starter motor.
I wire brushed and greased both the bell housing mating face the bolts as well.  I also applied a smear of copper grease to the ring gear and pinion to aid starter operation.
I also found a correct bolt to fit the air intake pipe.
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While the starter was off I checked the flywheel markings for accuracy by pinning the flywheel at TDC, which will be useful later... 
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I noticed an Lhm leak from the regulator which turned out to be the rubber reducer coupling, p# 96027351 is split.  I found one so fitted it.  If anyone has a source for these please speak up.
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When I fitted the timing belt I didn't have a water pump to hand and there was no evidence of leakage.  As I was fitting the belt based on age, not mileage I elected to install it without a water pump...which let go the following day...  
  
  
  
 
I ordered a water pump, drained the water via the radiator drain and the block drain on the back of the engine...
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removed the flywheel and timing belt covers, engine mounts, timed and locked the engine, slacked the tensioner and am awaiting a pump.
 
			
			
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