#2409925 - 11/27/17 10:02 PM
Can we discuss Big Block OEM Water pumps for 426 Hemi
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Registered: 06/27/14
Posts: 124
Loc: VA
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#2409928 - 11/27/17 10:06 PM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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#2409930 - 11/27/17 10:07 PM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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#2413586 - 12/05/17 11:51 AM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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top fuel
Registered: 05/10/03
Posts: 2195
Loc: Minneapolis, MN
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a 1969 426 Hemi would be a 290 casting with a bakelite (plastic) impellar, smaller diameter than the one in the above pic, it was unique to Hemis as the 383-440 did not use the bakelite impellar. The cross type hub is correct on all 383-426-440. The round one is incorrect for all applications.
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#2415598 - 12/08/17 11:57 PM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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Interesting, I have never seen the plastic 6 or 8 blade impeller. But what about the actual housing. I show several variations of the 290 above. Which was a 69 hemi? No one will see the impeller and probably not the mount either under the pulley. Though that is easy to change.
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#2415681 - 12/09/17 09:40 AM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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master
Registered: 01/19/03
Posts: 4523
Loc: Chicago Blackhawks
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The National Hemi Owners Association did a study of Water Pumps and Housing and what parts together cool the best. This was in the 1980s I believe and all the information was put into the New Letter. They found out that the Housing cavitates in the housing behind the pump if the pump and housing are not mated. I believe what was stated is if the pump does not go deep enough to take up the room between the pump and the housing it will cause the cooling system to cavitate and cause it to over heat. There were other things that were found out. Not sure if I still have that News Letter but maybe someone else that belonged back in the 70s and 80s kept the News Letter and can post the information.
I believe the information had nothing to do with OEM casting and part numbers and what was used in each year on the Hemi.
_________________________
1971 HEMI E BODY REGISTRY
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#2418428 - 12/14/17 09:44 AM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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#2427659 - 01/02/18 08:56 AM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: hemicar1971]
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master
Registered: 01/20/03
Posts: 5608
Loc: North Dakota
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The National Hemi Owners Association did a study of Water Pumps and Housing and what parts together cool the best. This was in the 1980s I believe and all the information was put into the New Letter.....I believe the information had nothing to do with OEM casting and part numbers and what was used in each year on the Hemi. Somewhat correct. I still have that newsletter. They listed casting numbers and part numbers in a chart from '64 to '71. Unfortunately the chart covered everything except the pumps.
_________________________
Wife says too many cars, liquidation coming soon......
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#2427700 - 01/02/18 10:24 AM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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#2429268 - 01/04/18 09:29 PM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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master
Registered: 01/25/04
Posts: 4104
Loc: fredericksburg,va
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Never had a Desoto and that one has not been rebuilt. I got the short block in 70, two rods out the side of block, that pump was on it but broken like you see. Put it on the shelf, been there ever since. But, hey no problem, it is what it is. In fact, I still have most of the engine.
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#2429570 - 01/05/18 04:07 PM
Re: Can we discuss Big Block OEM Water pumps for 426 Hemi
[Re: dragon slayer]
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Registered: 06/27/14
Posts: 124
Loc: VA
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Maybe some one took the good pump off and put a bad one on. I have had access to about 40 BB motors in various stages and that have been sitting for years and decades. Some late 70 motor have those pumps on them, and late 60 motor with the newer late 70 style pumps. What ever a person got from the parts counter.
I am basing what I believe from data in the service manuals, and the part numbers for impeller that where listed in the parts manuals. I appreciate the pictures and info.
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