Air pump seized internally
A bad pulley (sharp edge) A seized pulley A misaligned pulley
Failed water pump bearing.
A pump that locks.
The bearing in the water pump has failed and the water pump will need replaced.
Behind the water pump pulley. The pump is smaller than the pulley so the pulley hides it.
The water pump pulley is the pulley right above the crank pulley (the big pulley in the bottom of the engine.) Right above the water pump pulley should be the alternator pulley, which drives the alternator. I'm guessing the water pump is behind the WP pulley. == == == ==
Power steering belt to crankshaft pulley. Alternator belt to water pump pulley and to crankshaft. A/C compressor belt to power steering pump and to crankshaft pulley. Smog/Air pump belt to water pump pulley. This is for a truck that had a 2 grove power steering pulley, a 2 grove water pump pulley and a 3 grove crankshaft pulley................
Behind the water pump pulley. The water pump is small so the water pump pulley covers the entire pump so you can't see it. Once you remove the serpentine belt and the water pump pulley, the pump is easily accessible.
It is not possible to remove the power steering pulley on a 1997 Buick Le Sabre without removing the power steering pump.
Take off the sockets and remove the pump pulley.
That is part of the pump. The pump is NG.
Begin by removing the power steering pump belt from your 1991 Cadillac power steering pump pulley. Remove the power steering pump pulley retaining bolt. The retaining bolt will be in the center of the pulley.