Date: Fri, 10 Sep 1999 16:18:24 GMT
From: David M. Arnold <>
Subject: Re: Need guidance replacing waterpump

Good luck with your Adventure in Mechanicdom. For your sake, I hope your '85 8-valve engine uses the new (16-valve) block. On the older 2L engines, the water pump is located INSIDE the engine block, accessible through a cover on the top of the block that also has the hose fittings. The pump is gear-driven by the jack shaft (which in turn is driven by the timing chain), as opposed to the 16-valve version in which the pump is a bolt-on accessory driven by an external belt. The old-style water pump requires a special tool to remove and install. You have to dismantle a bunch of stuff on top of the engine, remove the cover, install the special tool and haul out the old pump shaft. You reverse the procedure to install a new pump assembly. The special tool minimizes the chance of damaging the shaft that runs the pump. On our '79 900, the water pump actually siezed, immobilizing the jack shaft. When we attempted to turn the engine over, the gear on the jack shaft shattered, taking the timing chain with it, resulting in a BIG repair bill. Before digging in, make sure your water pump is exterior to the engine. If so, replacement should be relatively easy. Otherwise, this is NOT a novice project, and involves significant risk of doing very bad things to your engine. --dma Sent via Share what you know. Learn what you don't.

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