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I've done this replacement on a 1987 Astro and a 1992 Astro. The '87 had several brackets for the other belt driven accessories that had to be removed with/before the water pump bolts, and it was a painful job. The 1992 had no extra brackets, only four bolts, and was a breeze. I hope that GM changed the style before your model.

I can give you general instructions on the '92 version here. Remove the plastic shroud that shields the fan. Remove four bolts and remove the fan. Remove the serpentine belt. Remove four bolts holding the water pump, and remove the pump. Clean the mounting surface of any gasket or gasket sealer (with a razor blade, being careful not to let any debris enter the engine block). Install new water pump with a fresh gasket and gasket sealer. Reinstall the serpentine belt, fan, and fan shroud.

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โˆ™ 2015-07-15 20:00:22
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Q: How do you replace the water pump on a 1990 GMC Safari 4.3L z?
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