Geoff Clark was kind enough to put very detailed instructions for all this, including how to set the impeller clearance, on-line. I can't find them with Google at the moment, but I have the link at home so if you'll contact me off-line I can send you the link as well as a copy of the official Saab SI on this. I agree with the comments that the sealing surface on the impeller has to be very smooth and flat - you may want to polish it with emery cloth and make sure it does not have any nicks or scratches. I have not seen the problem with the impeller being in too deep (seems like it should pull down to the stop on the shaft and be positively located) but I suppose it could happen. Also, make very sure that the seal assembly is correctly seated in the block (may want to also polish the surface in the block where the seal mates up to make sure that is not where the leak is).
posted by 198.208.15...
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