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  • November 06, 2024, 10:30:54 PM

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Author Topic: AC Delco Water Pump Fitting  (Read 102 times)

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Offline MIPS

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AC Delco Water Pump Fitting
« on: November 04, 2024, 01:31:13 AM »
I'm about to go onto water pump #4 since I bought this car and I'm considering instead of the cheap cast Gates/Carter pumps an AC Delco 252-629 which is aluminum but I trust their bearings not to fail after a year and a half.
Problem is that the outlet port for the heater core isn't included in the casting. Instead you get a threaded hole. Me, the parts house and every plumbing supply house I've tried so far cannot find a fitting to go from the 5/8" (or something similar) port to the 3/4" hose. How on earth were they expecting you to use this pump with a heater core??
« Last Edit: November 04, 2024, 01:32:10 AM by MIPS »

Offline 89 MJ

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Re: AC Delco Water Pump Fitting
« Reply #1 on: November 04, 2024, 12:11:53 PM »
That’s definitely strange. Also surprising no stores have something that will work. Maybe try a place that works with hydraulic lines.
1986 Eagle: 258, Auto, Chrysler 8.25 rear, 3.54 gears
1989 Jeep Comanche: 4.0, AX-15, 8.8 rear, 4.10 gears
1940 Chevy PU: 350, 700R4

Offline djm3452004

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Re: AC Delco Water Pump Fitting
« Reply #2 on: November 04, 2024, 05:21:49 PM »
Try the aluminum GMB/MasterPro 110-1030 listed on RockAuto. 

The one I purchased from them was made in Japan, which I'd trust for quality better than even some US-made parts.

('83 258 w/V-belts)


Good luck!
David
Current Project: 1983 Eagle Wagon 258
Past AMC Project(s):  1979 Spirit Liftback 232
                                1968 Ambassador 287

Offline vangremlin

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Re: AC Delco Water Pump Fitting
« Reply #3 on: Yesterday at 04:03:20 PM »
Can you find a fitting like this, that will allow you to go from the hole in the water pump to a 5/8" hose:

https://www.speedwaymotors.com/Short-Chrome-Heater-Hose-Fitting-5-8-Inch-Hose,878.html?utm_medium=referral&utm_source=share&utm_campaign=share&utm_content=ccc0211b-61f0-46e3-8c38-73327aacc663

And then one of these 5/8 to 3/4 hose adaptors?

https://www.summitracing.com/parts/uac-hf1907c?rrec=true

May not be the prettiest or most elegant solution but it could work

Good luck!

1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

 

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