Hi All
I've come across a question regarding these water pumps. It looks like they're both factory castings but one number is rotated 90 degrees from the other. Are these both correct for the application? Is one an early and the other a late casting? Or possibly from a different foundry? John

P6200914.jpg

P6200912.jpg

 

John
I have seen those also. I do not know why they are different. I am always looking for a "2" pump if you find any.
Don W

 

Hi Don
The more I look at it the more I'm leaning towards them being cast at different foundries due to the codes cast into them.

I know I've got blank ones, O's, 3's and 4's but will keep my eyes open for 2's.
John

 

upper picture is diffidently Lansing CFD


lower I think is Freemont CFD

 

John, I had the same question a few years ago, and I am glad that Dave shed some light on the two different foundries.


https://classicoldsmobile.com/forums...mp-styles.html

 

There were no CFD foundries in Lansing or Fremont. The different casting numbers mean simply that they are different castings. May or may not be for the same application. Most '60s/'70s pumps came in regular and heavy duty versions. I don't know if that is the case here.

 

Uhm, but...
they are NOT different casting numbers.
They are both X-404847 units
The top one is exactly what I am used to seeing.

The bottom one I will venture to guess is simply a different way to get the same result. The date tag 286 has screws just like every other factory unit. Maybe a service parts run made later? There is no YEAR clue, just Julian day.

 

Okay, let me be more specific: One is 404847 A and one is 404847 D1. Yes, different numbers. Different numbers or different "revisions". Differentiated by the numbers never the less. And yes, both OEM (because of the Central Foundry Division id). Both could end up having the same Olds factory "part number" too, as water pumps are only cataloged as assemblies.

 

I should have said "Saginaw" which is where the CFD is that services Olds Div. in Lansing. There were several others, do not remember where. I think one is in New York. but I always thought they did Chevy stuff. Could have also done castings for Olds for the Linden and Framingham plants.

 

OK, sure, if you include extraneous info after the huge main ID #/Letter and the 6 digit casting "number" then yeah they differ. What struck me was the different orientation of the casting ID group on the inlet. I have never paid much attention to the D1 S Wheel and all that other stuff that appears on castings like this. If anyone can shed light on what the "D1 (S)" and whatnot mean, speak up!

Maybe we should delve into the fonts used and how much fillets the characters have, like the distributor and carb numbering fake spotter tips thread. No, seriously.

The J-'662 intakes I see may or may not have a tang extending off the round boss aft of one of the vacuum port holes near the casting ID- served a purpose, no doubt, but that is a mystery now. Hell, it took forever to figure out that the block rib drill spot indicates .921 lifters...

 

I'm pretty sure the D1 is a mold number. If there is a defect, you need more than the date code to trace it back and purge defective stock. Knowing which tool was used to cast the part is critical.

IS this pump unique to W-30 equipped cars? If so, it would not make sense for any foundry other than Saginaw to make the casting. Therefore, I would just think the foundry just had molds which were configured differently.

 

Applications include 1970 V8 Cutlass models with A/C.

Don W

 

OK, in that case, I would say the two different foundry theory would make sense. Someone would have to research known survivor cars to see if there is a usage pattern.