Fan-Water pump distance

[Richard S.]

I would appreciate if someone would provide me a measurement for the fan penetration into the fan shroud. I need a point of reference and end point. This is for a 63 SWC 340HP car. I realize this measurement is the probably the same for many vetts.
Thanks
Rich

[Richard G.]

Re: Fan-Water pump distance

The slug on the end of the water pump can be moved on the shaft in the axial direction.
Here is the measurement that worked for me. I just move them as needed to align the drive belts correctly.

And the pictures you asked for;






Let me know if this wasn't what you needed.

[Joe L.]

Re: Fan-Water pump distance

I would appreciate if someone would provide me a measurement for the fan penetration into the fan shroud. I need a point of reference and end point. This is for a 63 SWC 340HP car. I realize this measurement is the probably the same for many vetts.
Thanks
Rich

Rich------


Half in, half out.

[Joe L.]

Re: Fan-Water pump distance

The slug on the end of the water pump can be moved on the shaft in the axial direction.
Here is the measurement that worked for me. I just move them as needed to align the drive belts correctly.

And the pictures you asked for;






Let me know if this wasn't what you needed.

Richard------

The GM spec for the waterpump hub spacing for the vast majority of 1955-68 (+69-70 Corvette) small block waterpumps is 5-9/16" which is just about exactly what you show. A few had hub spacing of 5-11/16" including a few Corvettes in the 1963-67 period.

[Richard S.]

Re: Fan-Water pump distance

Thanks Richard for the information and pictures.

[Richard S.]

Re: Fan-Water pump distance

Thanks Joe for the information it is appreciated.
Rich

[Darryl D.]

Re: Fan-Water pump distance

The slug on the end of the water pump can be moved on the shaft in the axial direction.
Here is the measurement that worked for me. I just move them as needed to align the drive belts correctly.


And the pictures you asked for;






Let me know if this wasn't what you needed.

How is that accomplished? I would think that if you are trying to pound it back with a socket or pull it forward in some way you would risk damaging the seal.

[Richard G.]

Re: Fan-Water pump distance

A three prong puller (pushing on the shaft) to pull it towards the front.
I pull the stamped steel cover from the back and use a press, pushing on the impeller hub center, to put it on further.

In my younger years the water pumps varied all over the place on the hub placement.
No internet and no Joe Lucia to set me straight on the specifications.
Very much appreciate this forum.

interesting thread.
Rick

[Darryl D.]

Re: Fan-Water pump distance

A three prong puller (pushing on the shaft) to pull it towards the front.
I pull the stamped steel cover from the back and use a press, pushing on the impeller hub center, to put it on further.

In my younger years the water pumps varied all over the place on the hub placement.
No internet and no Joe Lucia to set me straight on the specifications.
Very much appreciate this forum.

interesting thread.
Rick

That still does not answer my question. How do you keep from risking damaging the seal?

[Richard G.]

Re: Fan-Water pump distance

The seal is mated between the cast-iron part of the pump and the bearings.
If you are just pressing/pulling on the shaft you are not putting any forces on the seal or bearings except the weight of the cast iron pump housing.
Maybe I have a pump apart I can get pictures of?
I will have to look.

I didn't watch the whole thing but possibly this YouTube video will help.

https://www.youtube.com/watch?v=WysKjBDaFDA