Re: [Amc-list] stupid water pumps (195.6 water pumps)

[farna@xxxxxxx]

You know, after looking at the TSMs, the four bolt pump may just be the aluminum engine pump. I'm not 100% sure, and don't recall if the four bolt I was sent had a cast on heater outlet or not. The part on E-bay you stated was for the aluminum engine was definitely a four bolt pump. I've looked at the parts book, and all 60-65 195.6 cast iron engines used a five hole pump. 

The parts book illustrations don't show a right (passenger side) heater outlet water pump for the 195.6, but I thought I had one like that. I may be confusing this with a 232 family engine -- all of them have a right side outlet. It appears that all 195.6 outlets may be on the left side. In that case this reduces the number of pumps to three -- a long and short shaft five hole, and a long shaft aluminum block four hole pump (aluminum engines were never offered in the American, which required the short shaft pump). 

The parts book, however, does list SIX different OHVC/LHVC (OHV and L-head cast iron) and THREE OHVA (OHV Aluminum) water pumps. Two of the OHVC/LHVC pumps are heavy duty, two of the OHVA pumps are. That still leaves four different OHVC/LHVC pumps, and there's no way to tell the difference. The two HD OHVA pumps just use different types of alternator brackets. All the HD pumps are for cars with alternators, which was included with AC. I would assume they have a heavier bearing assembly. So at least the OHVA pumps are interchangeable, might just need to modify the alternator bracket or the bolt boss on the pump that holds the adjusting arm (one used a cast iron alternator bracket w/3.75" adjusting arm, the other a bar stock bracket w/5.5" adjusting arm).

I'm beginning to think I was sent a pump with the long shaft first (I needed a short shaft for my American), then an aluminum engine pump, then a 199 pump -- after which I sent mine in to be rebuilt. Any machine shop can press the fan hub back on a long shaft pump and trim the shaft, they just have to be careful and not break the impeller. 


Date: Wed, 9 May 2007 09:27:15 -0700 (PDT)
From: Tom Jennings <tomj@xxxxxxx>

On Wed, 9 May 2007, farna@xxxxxxx wrote:

> 2 bolt patterns
> 2 pump shaft lengths (for each pattern)
> 2 heater outlets (for each of the above)
> Eight different combinations?

Oh great fun. Just what I like to do, spend a dozen hours on a
single part. I recalled somehow that this water pump business
was stupid.

Thanks for the things to look for! I wouldn't have thought
about counting the !@!#@$! mounting bolts! The heater outlet,
eh if it works...

--
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)
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