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Old 08-21-2009, 06:09 PM   #1
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Replace Water Pump - Still Leaks

I'm kicking myself for not posting this this morning after I finished the job, since a lot of people will miss the post now.

'78 EMS came into the shop, owner had a new in the bag Saab water pump kit, with the impeller and drive shaft to replace his ailing one. He sometimes had leaks out the weep hole, and there is some water in the oil, nice and creamy. Compression checked out fine, so I went ahead with the water pump install.

Have factory press and arbor tool sets here at the shop.

I pressed the bottom support bearing assembled to the shaft all the way down home, put on middle water/shaft seal, pressed upper water seal down tight, then pressed on impeller till it felt like it was nice and down home (it's a type III kit, with no nut or bolt holding the impeller on.)

I now have a very steady stream of water out the weep hole even just when I fill the system, and when the engine is running.

Is there a break-in period for the upper graphite seal to start sealing?

Did I press the water seal down too hard?

Did I not get the impeller pressed all the way down?

I am staying after hours tonight to rip it back apart and hope I don't destroy all the seals in the process, since I screwed up, and customer provided a very expensive set of parts, he wanted to go this route rather than converting to the electric.

Any ideas what I did?

Best,
Drew
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Old 08-22-2009, 12:53 AM   #2
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Fixed!

Old (guy bought it years ago) carbon graphite upper water seal shattered inside the block when I pressed the impeller on.

Tore it back down, replaced with a later style rubberized seal I got from a Triumph supply shop. Works like a charm.

Best,
Drew
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Old 08-22-2009, 06:45 PM   #3
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well thats good that it was an easy fix. If and when I put up an old skool saab I deff plan on going down the electric road
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