Re: Loose oil pump shaft - Saab Saab Model 99 Bulletin Board - Saabnet.com
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I looked at a couple of other distributors this morning, and they all have the relatively loose fit of the oil pump shaft as you describe. I think that is actually necessary to allow for variation in alignment between the oil pump and the distributor - there needs to be some play. You may want to check for play in the distributor shaft bearings - they should be nice and tight and smooth, and if there's enough play in the distributor shaft for the rotor to hit the cap then I think the problem may be in the distributor itself. Make sure that you have the dust shield in place - I think it may act as a spacer between the cap and the distributor body so if it's missing the cap may sit too low and create a clearance problem with the rotor. Another problem that is common with distributors at this age is that the lubrication dries up and the mechanical advance mechanism (both vacuum and centrifugal) seizes. I have usually been able to cure that by taking apart the distributor and cleaning, polishing, and lubricating everything.
I hope this helps!
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