What length are Z-11 and Edelbrock water pumps?

[Skip FIx]

So are Z-11 and Edelbrock pumps the same length as the larger bearing later model water pumps for pulley line up?

 

[Skip FIx]

Pulled mine out of the depths of the attic Edelbrock 5.510 to block surface. Z-11 5.580 .

 

[327]

 

[409Kid]

Hey Skip Fix.

I need an original aluminum water pump for my Z-11 build. Would you be interested in selling or know someone who would be?

 

[oldskydog]

So are Z-11 and Edelbrock pumps the same length as the larger bearing later model water pumps for pulley line up?

Don't know if the Z-11 is included in this but seems likely that if not same as 63 production then same as second design 64. 65 had a different shaft and big bearing. Overall length of the bearing and shaft assemblies is 4.688" for 58-early 64 and 5.020" for second design 64-65.

 

[Murphdog]

Don't know if the Z-11 is included in this but seems likely that if not same as 63 production then same as second design 64. 65 had a different shaft and big bearing. Dimensions from face of hub to engine mounting face is 4.688" for 58-early 64 and 5.020" for second design 64-65.

Cecil, I'm confused, "Dimensions from face of hub to engine mounting face is 4.688" for 58-early 64 and 5.020" for second design 64-65." This does not match your chart??? The dimensions Skip Fix gave are in there and I rough measured 2 stock pumps at 5-1/2ish.

Jeff

 

[Skip FIx]

I can take pictures of the Z-11 pump later today(at the office now). Got the pump with a complete motor in the 70s. Guy told me water leak was form a warped head he machined and new head gasket-Nope a severely leaky sleeve he said he told me block was sleeved -so got screwed on that deal other than the 690 heads were OK-had welded on BBC guideplates! Patt Bill's Speed and Sport in Irving-had the 409 in a T bucket roadster he raced.

I have a couple of the early pumps and the ones of my first car were later ones(had one back up) I think are close to 5.5ish too for the late ones.

 

[Murphdog]

According to Cecil's chart, the late/2nd design should be 5-3/4" and when I measure the difference on water pump pulleys it is a 1/4" between the early 2 piece and a pulley I have marked as off of a 65 engine.
Jeff

 

[409Kid]

I would have to dig out my pumps but it seemed to me that back in the day I either pressed the hub back for alignment or I shined the bottom pulley out or a combination of both. Obviously with shimming the bottom pulley you lose the indexing of the pulley to the crank snout balancer hole.

As an alternative you could shim the balancer out from the timing gear to get your proper alignments between the pump and crank pulleys.

 

[409Kid]

63impalass409

Not wanting to sidetrack this thread but…Was the Z-11 an externally balanced engine?. Seems to me I saw a pic once of the backside of the balancer and it had a pork chop cast into it.

 

[409Kid]

63impalass409

I deleted my question as it was off topic but you were too fast for me. lol.

 

[oldskydog]

Jeff

You're right. I got that reference from a Canadian Parts Catalogue #651 December 1964 on GM Parts Wiki and I wonder if it is metric, I'll have to check that out.

Looks like it refers to the waterpump bearing and shaft assembly overall length. From Group 1.105 .I would post the page but it won't let me post a .png.

 

[Skip FIx]

Z-11 bearing OD 1.170 shaft is .620. When I got it about 1973ish it was polished and casting # were off either for polishing or hot!

 

[409Kid]

Skip Fix. Contact me offline if you would be interested in selling your pump. Beggars can’t be choosy when I comes to acquiring this stuff. Casting date doesn’t bother me. You can see where the plinth was and that’s good enough for me.

 

[La Hot Rods]

What foundry did they cast those? Looks like a nice casting.

 

[1964SuperStocker]

Any idea what car that pump came off of, the history is more important to me.

 

[63 dream'n]

I would’ve thought that the stock 409 water pump installed height would be the same as the Z 11 they both used the same idler pulley. What am I missing?

 

[Skip FIx]

Pump came with a motor I bought that had been in a roadster when he switched to a BBC . Had a Z-11 cam in it . Fired it up in my Impala and sounded great -until we added water to the radiator! Milk shaked it! Basically told me tough sh-t.