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History / OriginalityGot a question about 1982-1992 Camaro or Firebird history? Have a question about original parts, options, RPO codes, when something was available, or how to document your car? Those questions, answers, and much more!
I have an 88 Trans Am with the LB9 and I replaced my water pump a few years ago with an oe AC Delco iron replacement pump. I don’t believe the pump I removed was the original and I have two questions as a result.
The first being if anyone knows the GM part number for a factory water pump? Secondly if the pump was painted black along with the block and heads at the factory? Since they usually rust quickly after installation depending on the environment the car’s in.
Not sure about the original part number, I bought a closeout sale remanufactured pump for $7 or something and it works fine. What I can tell you, is to clean the pump surface with alcohol, mask all the parts you don't want painted, and then spray it with Dupli-Color Engine Enamel Primer first. Then hit it with Dupli-Color DE1635 and you'll have a nice, long lasting factory black water pump.
Original pumps for serpentine setups don't have the ugly bypass boss on the top of the pump.
yes, the originals were painted with GMs cheap semigloss paint installed on the engine. behind the pumps didn't get much paint.
Original pumps for serpentine setups don't have the ugly bypass boss on the top of the pump.
yes, the originals were painted with GMs cheap semigloss paint installed on the engine. behind the pumps didn't get much paint.
I did some looking based on you mentioning the lack of the bypass port on the water pump and found one part number 10108451. The black one sold on ebay this February but the red one shows the top view, is this along the lines of what you’re thinking?
Ive noticed the OE castings also have a weep hole on top, not just on the bottom, correct?
That seems to be the case from my observation.
This is from a 440 mile 89 Iroc:
I ordered a refurbished gm one that seems to be made from the same original style casting, and I’ll be painting it black and installing it but beforehand i’ll take pictures for people on here to have as reference material going forward.
My main question would be if gm would spray primer on the engine block/water pump before painting or just cheaply spray the black paint on by itself?
04-18-2024, 08:02 PM
