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1954 Cadillac Fleetwood water pump confusion

Started by matttupp84, August 26, 2013, 09:39:35 AM

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matttupp84

Hey guys I am new to the forum but a long time classic Cadillac owner. I bought a 54 Fleetwood last week and I pulled the motor out this weekend. And I am very confused right now. I was searching to buy a water pump. Well there are 2 pump options from what I can tell. one without the ports on the top is for the hydramatic trans and the one with the ports is for cars with the dynaflow. Well here is my confusion. My car has the ports on the top of the pump like it is a dynaflow water pump, but I am almost certain is has a hydramatic trans from the pictures I have seen, and it has the 30 bolts on the flywheel like a hydramatic. So why would I have the other water pump? Perhaps the trans was changed or maybe the pump. But there are heater hoses going to the ports that look very original. And my other question is, does it perhaps have these ports on the pump because it is a factory AC car? I just need to order a new pump and I didn't know which to choose. Thanks in advance for the help.

Matt

Walter Youshock

The '54 shouldn't have a Dynaflow.  There was a short time in 1953 where the DFs were used after the Hydromatic plant fire.  By '54, all Cadillacs had gone back to the HM.

If you want to be totally sure, just jack up the car and look at the trans pan.  Also, the shift quadrant on the Dynaflow has "Park", which Cadillacs didn't get until 1956 with the dual-coupling HM.
CLC #11959 (Life)
1957 Coupe deVille
1991 Brougham

R Sotardi #11719

Matt, the two 1/4 plugs were not for Dynaflow. They were part of the '54s new heating system. Some of the 53s late in the year had the plugs. The pump should work fine and is correct. For the best info regarding that issue go to Paul Allens' reply on the April 13th 2013 thread on the dynaflow water pump. Ron

matttupp84

OK good deal. Thanks for the feedback guys. I pulled the motor and trans this weekend so that is why I was confused. I know it definitely has the hydramatic I was just confused with the water pump. Mine is toast and I need to order a new one. So the confusion came in when I went to order one and the water pump with the ports says it is for the dynaflow cars, the other without the ports is for hydramatic cars. I just haven't been able to find a pump like mine apparently.

Walter Youshock

Can you post a photo of the pump?  I'm not really familiar with the differences.  I got a replacement pump for the '57 once and I had to remove the trans cooler lines and brass distributor from my old pump to go on the new one. 

This is intriguing.  I'll have to check the parts book tonight.
CLC #11959 (Life)
1957 Coupe deVille
1991 Brougham

matttupp84

Sure I will take a couple of pictures this evening when I get off. This car has turned into a nightmare. I have bought many Cadillacs off of the internet. This specific one the guy told me it was running and driving a few months back but it popped a freeze plug so it wasn't running anymore. I live in Louisiana and I had it shipped from California. It got here last week and I pulled the oil drain plug and it was mostly water then nothing but gunk coming out of it, so the head gaskets are blown too. The car hasn't ran in 4 plus years I'd say from the looks of the drivetrain. I was planning on just getting it running and driving pretty easily. But who knows what it will turn into now. Its a shame when people do that to you. But theres nothing I can do about it now, I just have to cut my losses and get her back on the road. Until then I have my 65 Coupe to keep me happy. Thanks for the help, I will get some photos later today.

R Sotardi #11719


Walter Youshock

My parts book only goes back to '55, so this may not help.  Water pump 3630514 and it's the same number for '56 with the 365 engine.  It may be possible the same pump was used in '54, but I don't have the definitive answer...

CLC #11959 (Life)
1957 Coupe deVille
1991 Brougham

matttupp84

Thanks for the help guys. After some advice from you guys and some more research, apparently in 54 they went to a new heating system which is what the ports were for and it has nothing to do with the the dynaflow. New pump is on the way. $165! Thanks again

55 ledsled

I am also looking for a 54 pump with the top outlets. Where did you find the pump? Was it rebuilt? Any info would help out greatly.