Volvo 2002 Starter Solenoid

Some Bosch starter solenoids have a nylon centre tube which can swell and cause the plunger to jam. Your water leak would seem a good reason for that to have happened.

Requires a new solenoid to cure the problem but clearly this isn't related to the condition of the motor.

If the bearings gears and brushes are in order the starter should be ok, just a bit of lubrication on the brass bearings and moving parts would be appropriate whilst its off.

There's a bit of cross referencing in this http://www.ebay.co.uk/itm/VOLVO-PEN...arts_Vehicles_CarParts_SM&hash=item485f8e107c
ebay ad.. Count the number of teeth on the gear and check the other details described that supplier appears to know their business and show good feedback score. Is the lower price you've seen for a 2002 engine or a 2002 car? Starter motors aren't high technology but you may need a heavy soldering iron.

This was the one that a quick search of ebay turned up. I've not studied it carefully at this stage for compatibility, but it lists many of the same part numbers as the one you've highlighted. Good to have a personal recommendation though (thanks also to Vara).
 
Bit the bullet...

Starter now out.

I'd have had no chance of removing the solenoid from the starter with it in situ. There were locking tabs on the nut that takes power to the starter which could not be seen with it in place and, even if I'd known about them, there was insufficient access to bend them back.

Also, the solenoid is secured to the starter at the pinion end with two bolts that have slot heads in them for a screwdriver. Gentle persuasion with an impact driver has had no effect on them (I've not had a proper attempt yet), so I certainly wouldn't have been able to undo them with the starter in place.

Just thought I'd mention this in case anyone finds themselves in a similar position.

I'm going to replace the lot now that it's out and, if I can fix the old one, keep that as a spare.
 
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