Both of those pump blades point in the same direction. The flats are to the right.
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Both of those pump blades point in the same direction. The flats are to the right.
Photo 1 1989 and later pump and housing (Common Block)
Photo 2 1988 and earlier pump and housing (Non COmmon Block)
Photo 3 earlier and late pumps side by side.
88 and older use a gasket. 89 and newer typically use a rubber seal. The photo I have attached to this post is for an 89 or later.
The 88 and earlier pump will not bolt to an 89 and later...
Here's an 89 water pump assembly I have on the shelf.
The pump housing was cleaned, de-burred and repainted. It has a new AC Delco pump.
I also have the correct mounting bolt, mounting bracket and...
88 and earlier pumps spin in the opposite direction of 89 and later pumps. If you have an 88 pump with an 89 pulley, you're spinning the 88 pump in reverse. It is not designed to flow in reverse and...
The mini van 2.5 used the same pump and housing as any other 89 2.5.
1988 and earlier used a different pump and housing.
The 89 pump pulley is smooth, the 88 pulley has ribs.
At some point...