water pump for a 478 with air brakes

[twarner]

I know this has been asked before, but I did not see any recent threads and NAPA claims they no longer carry one, but I need one for my L8500. Where can I purchase a water pump? Anyone have a good one?

Thanks!

Terry

The truck is our water hauler, so we will need it soon....Lol

[bigblockv6]

Do you have the bigger heavy duty water pump? If you do those are serviceable, I have a GMC Manual that mentions this. I'll look it up to see what the procedures are or you can find a local rebuilder. The smaller pumps are the same as mid 50's and early 60's Pontiac V8's good chance those are still be produced.

[tommr]

Terry use the search feature and type in 401 water pump. the 401 with air brakes is the same pump. there are part#s in that thread that you can google. you need the pump with the threaded keyed shaft. they are available. good luck. tom

[twarner]

Thanks guys! I'm checking now.

Terry

[twarner]

Here is the pump I ordered on ebay. I removed the old pump and it sure is bad.... the impeller just unbolts from the front of the water pump housing and I have the 5/8 fan stub, so the other threads and stuff on this site, I've found said this should be the 401/478 pump for me. You can also get this with a 3/4 in shaft as well.
http://www.ebay.com/itm/261726987664...%3AMEBIDX%3AIT

Thanks again! Terry

[tommr]

doesn't your existing pump have the threaded shaft with the notch for the key? the pump you are showing has a conventional flat flange. ebay item 261656100663 should be the one you need. tom

[twarner]

no it has the flat flange with the 5/8 shaft. The pulley and fan just bolt on with the four bolts. That's why I wanted to remove it first, before ordering anything. Now I can also say this was not the original pump!!!! After removing the pump, it had numbers on it that led me to the one ordered as well.

Terry

[twarner]

So this part Cardone 58-160 that I have ordered on ebay, I'm not holding out much luck in getting it in a timely fashion if at all. And I do need the one with the 4 bolt flange and a 5/8 pilot for the fan. So I am pleading again for all you folks with parts to have another look and see if you have one. I can't wait months for this as we use this old truck for real and depend on it. Maybe that's not a good thing as it turns out. Shame as the truck has no rust and almost no miles on it. Been in New Mexico most of it's life. 478 and a 6 speed allison auto. 43,000 lbs GVW and it might just be for sale soon.....

Terry

[tommr]

terry if you google that part # there are a bunch of guys showing this pump. cant you get one of those guys to pronto you one out. tom

[twarner]

Hi guys,

Update! over on stovebolt, one of the fellows there had a part number for a Gates pump the Amazon says they have in stock and it's new. Waiting on tracking info. All the other parts places that might show a "in stock" status come back with, we need your core to send to cardone for an overhaul. So not really in stock per se. So what I think I will do here is: Get the new one if that's real and have the old one rebuilt. I or someone will need it. That's what I'm thinking.
Terry

And Thanks everyone! If it was not for the knowledge base of folks like you out there, I would have not bought this old truck.