While it has not leaked in MONTHS last winters few times of seepage from the weep hole I know I need to get the pump fixed. I am going to pull it and have it rebuild so I can keep this car all orig as it is.
I am going to replace the upper and lower rad hoses also and the tstat and little hose near there.
What gaskets do I need for the WP and tstat hosing? if it paper do I put any sealant on them or just clean on surfaces and just use the dry gasket?
I am going to assume this is a straight frwrd removal and reinstall of these parts?

 

what type of gasket do I use, I cork and paper. I see some (ebay) that say are for AC and HD cooling, does that matter for my 350 motor. Anyone?

 

this work?

http://www.autopartswarehouse.com/sk...8wapugaFP35065

 

That looks like the one that came with the pump I bought and installed on my '73 Custom Cruiser a year and a half ago. I'm guessing it will work fine.

When I bought the rebuilt water pump, it came with a gasket, so there was no hemming and hawing or worrying about whether this or that one would work. I just used what came in the box, didn't give it a second thought, and it worked fine.

 

I question the value of this. While it may not get replaced as often as the air filter, oil filter, fuel filter, or PCV valve, the water pump IS a wear part, and no one expects a car to have its original one after enough years and time. No one will look at your car and say it has lost value because it doesn't have the original water pump.

First of all, are you sure that the pump on the car now IS the original one?

When I bought my '73 Custom Cruiser back in January 2010, it was 37 years old, had 102,000 miles on it, and it was on it fourth water pump. The full maintenance records for the car came with it, and the original water pump went back in 1976 at 28,000 miles. The second one was replaced in 1982 at 65,000 miles, and the third one was replaced in 1996 at just over 100,000 miles. So the pump I put on in January 2014 at 109,000 miles was the FIFTH pump to be put on the car.

Did I care about originality? Hell no! As far as the water pump in this car, originality was lost in 1976!

If I were you, I would just go to NAPA or O'Reilly's or wherever, get whatever pump they offer, and stick it on. If it's a rebuilt and trading in a core will save you a few dollars, so much the better as you have one to trade in. I put a rebuilt on my car, and it worked fine.

Plus, you won't be without the car for however long it takes to have the pump rebuilt.

Just my thoughts.

 

I am fairly certain the motor and the WP are orig to each other. Its all painted gold. I am to understand that is the color of the motor in 74? If so everything is still gold including pump, and it's color is the same, does not look like it was repainted with a "close color" as a replacement may have been done through the years.
I had a 70 Camaro that had a WP go. I kept it but put on a reman unit. The pump was orig to the car and actually was a lesser used unit GM used in 70 on small blocks per CHEVY BY THE MUMBERS 1971-1975 book I had at the time. Like this olds the motor was never touched, orig card, intake exhaust mani. When I sold it the buying water that old pump.
This is no 1970 Camaro but why not keep it orig. Rebuilding this pump would be no worse then by a reman unit and as for down time it is only about 3 days.

 

If I am reading this sites info right mine is orig to the car. http://www.oldsmobility.com/oldsmo/v....php?f=6&t=391
The casting number of 413307 matches this chart that is on my pump. And there is the weird other stamping this that looks like a clock and a 04 which I suspect means 74. Mine is a no ac car also which the chart shows as 413307 casting.
Does this mean crap for collectability, not really but I know I can keep it numbers matching down to the pump anyways, ha ha.
I think I will pull it and have it rebuilt.

73-80
350R 1 Outlet 5.95 231462 412265
350R 2 Outlet 5.95 556283 412265
350R w/o A.C. 5.57 231886 413307

 

"Special note on water pump casting numbers:
Numbers 413307 may appear as 418807"


Mine looked at 8's till I wiped it off a little.

 

Yes it matters. If your car has AC or doesn't, the length of the pump is different and the pulley won't fit. There are three lengths of Olds 350 water pump and a non-AC pump will not allow the deeper pulley to fit if you have AC.

 

I have a non ac car. Since I can afford some down time I am just going to send mine out and get it rebuilt. Since the car is 98% all orig I may as well keep the pump. Most rebuild places will leave the orig paint on them as best they can.