VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1937-1945 1940 Water Pump Pulley

Wanted to reinstall the water pump on my 216er engine today, but I noticed that the pulleys were not aligned.
When trying to disassemble the pulley I have unfortunately broken. I was very careful because I knew that it could break, but s... happens .
Now where can I get a new one? Chevs has none, only those for 53-54. Or does it fit? And whats about the bearing? Don´t know if i need a new one
Could this parts fit?
https://www.lwdparts.com/product/pulley-water-pump/
https://www.lwdparts.com/product/bearing-waterpump/

According to dealer, both parts fit well. Is it difficult to overhaul the water pump? I dismantled the pulley with heat and press. Now should be able to beat the bearing out of the case, or not?

Alligator
The front pulley is pressed onto the shaft and I think it hides a clip that locks the bearing in place. When that clip is removed you then need to remove the impellor which is also pressed on, The bearing then pushes out the front.
If it is the early style with brass bushes I think removing the front pulley allows the impellor and shaft to slide out the back.
Tony

Try to find a NOS or older rebuilt pump on Ebay or check with your version of NAPA over there as NAPA still sells them in Canada. Check with Bruce Bugay on here as well. Most pumps seem to come with the pulley.
That way you have one on the way while you work on that one. You should have a spare or two in your hands long term anyway.

I have several used (worn out) pumps for 37-39 with pulleys but not sure how they compare with the pulley you need for your 1940.

That style pump was really never designed for pulley replacement.............would also suggest a new pump (ebay)

Ok, but that makes me wonder. Why then does every dealer want my old pump? All Pumps i can find ar not new, only refurbished. Also there are Thomson Rebuild Kits WS 80 available. In all this cases the Pulley must be replaced, so it should be possible.
Napa has the pump in Stock, but they don´t deliver to germany

I am asking for my own knowledge here. Was the question of the pulley position resolved here?

Andre,

According to the parts book, the pully could be bought separately. The same pulley fits 1939-48. Group # 1.062 Part # 838904 (#838905 stamped on pulley).

Accordingly, the pulley must have been or still is, replaceable.

I can see where Gene is coming from, though. By the looks of the fromt of the shaft on yours it appears that it would be a heck of a job getting the old one off. Yours looks like it has been a pacifier for a pit-bull.

Maybe some filing the unused portion of the shaft will reduce it slightly so that it ican be removed.

I will look and see If I have a spare pulley. Or that I can get one off an old pump. I'll let you know in a little while.

Best,

Charlie

@old 216 - no the pulley position was not resolved here. Thats very interesting for me, too

@charlie - The part Number is the same I´ve found. As you can see in my second post, I dismantled the pulley with heat and a 2Ton Hydraulik press. The shaft diameter is ~ 0,625". I have drilled out the old pulley and tested it. For the correct height, it would have to be pressed a little further onto the shaft. That is quite possible. It is also located no spacer under the pulley. It is to despair, it is almost impossible to get the 1-hole pump. Everywhere only the 1941 two hole. Thanks for your help

If your present pump is not a genuine Chevrolet part a genuine Chevrolet pulley may not fit,
A Chevrolet made pump will have GM and the raised casting number 598309. on the housing.
.

Found a pulley. It was loose and not on a pump. Best I can tell, it is the same size as on a NOS 41 pump I compared it to.

If you want me to send it, let me know. PM address, if you do.

The pulley is free but not the ride.

Best,

Charlie

Do you need a pump?

@Chevgene - the pump is a genuine Chevrolet Part, the Number 598309 is stamped on it

@charlie - Thanks a lot, but at the moment I´ve found a Pulley in the Netherlands. Much better for me, because no Tax and cheaper shipping
https://www.lwdparts.com/product/pulley-water-pump/

@old216 - hope the old one would works with the new pulley - Turns a little bit strong, but should work. If not i will tell you.

Cardone has rebuild pumps in stock. they told me the height from bolting surface to center pulley with 2,859" ?!
For Info - The outer diameter off mine is ~4,40", inner ~0,625" and height ~2,20", Bolt circle of the propeller threads is ~2,22"

The pulley on a pump I was going to rebuild was a 2 piece unit spot welded together with 4 bolts to hold the fan blades. I eventually (after destroying the pulley) removed all of it with a plate bolted to the fan bolts holes and another bolt as a spacer between the plate and pump shaft (harmonic balancer style).
Unfortunately I applied too much force trying to remove the shaft and broke the main housing after getting the pulley off.
Tony

It´s is interesting. "Cardone" told me that the Number 598309 crosses to these Cardone Numbers
- 58-357
- 59-8012
- 59-8013
- 59-8122

589309 casting number was used on both the 1937-38 water pump housing and the 1939-40 housing. The difference was the pulley.
The picture shows two different belt width pulleys and two different length pulleys.

Thanks for this information

Can someone tell me the Diameter of the 4 Fan Blade Screws?

Andre,

The ones I took out of my 41 pump to measure were: 1/4 diameter by 20 threads by 5/8 inch long over all. I think yours would be the same size.

1/4 x 20 x 5/8. The length may vary but as long as they don;t hit anything on the back side, no worries.

Minimum length would be 1/2 inch long or so. They take a small lock washer i.e., 1/4 size, of course.

The parts book lists them as USS, Cad. I guess the CAD stands for cadieum.

Maybe Gene can verify as to whether the above size is what you need. He lives in another time zone (read: planet) and is probably still asleep.

Best,

Charlie

Hello Charly, that's the diameter I suspected too. Do not have my screws right here and as I build a puller for the pulley, I need a little longer screws.