Just received my new stewart stage 2 water pump today. I do have a few questions. There is a hole at the top which looks like i am going to have to block, what is that used for, and where can I pick up a plug that will block that. My second question is, my crank pulley is 6 inchs, what size and possible parts numbers would I be looking for, as for a water pump pulley any help and parts numbers would be appreciated, thanks

 

The port is for a heater hose connection on cars with different plumbing. You can get a pipe plug for it at any hardware or parts store.

What's wrong with the pulley from your old water pump?

 

its electric

 

The hole is a simply 3/8 NPT hole (or was it 1/2"? Forgot, it's either of those) so you can plug it with an NPT plug.

Why not simply get an OEM WP pulley? http://www.summitracing.com/parts/NAL-10055880/

10055880 Water pump pulley is part of the over the counter GMPP serpentine kit (same as stock)


12497698 Serpentine Accessory Belt Drive System "Deluxe With Air"
This deluxe serpentine belt drive system with air conditioner includes all the components to install on small-block Chevrolet engines. The bolts, nuts, spacers and braces are included with the following major items:
10055800 Secondary Air Injector pump bracket
1134344 Air compressor assembly, (CR4)
10129569 Idler belt pulley bracket
88894005 Water pump kit
10055880 Water pump pulley
10055879 Crankshaft pulley
10463172 Generator assembly (reman.)
12117361 Generator connector (with lead)
10055798 Drive Belt Tensioner Assembly
10085752 Belt (fan, water pump, A/C pump, and generator)
10105212 Generator & power steering bracket
26010328 Power steering pump
14102096 Power steering pulley

 

was looking for an aftermarket upgrade, but only finding them in sets of three and not individually

 

Since my crank pulley is 6 inches would a stock water pump pulley be able to turn the water pump enough to cool my motor?

 

anyone know of a good aftermarket water pump pulley?

 

what style of belt system are you running?
if it's original serpentine,original W/P pulley should work
good,but will give slight underdrive of W/P with the 6"
crank pulley,will reduce high rpm horsepower usage,
but may result in slow circulation at idle if you have
near-stock idle speed.
I do not like cheap,imported,cast aluminum pulleys as
those wear fast! good,u.s. made ,billet,anodized, pulleys
should last good.

 

its the original serpentine setup. Was looking at the march pulley 4012. I just don't want to go through all this work and find out its not cooling enough. Like I said my crank pulley is 6 inchs, If I get a water pump pulley thats the same as stock 6 1/8 inch. Would that cool enough, or should I get a pulley thats a little smaller than the crank?

 

ttt

 

for street use i would overdrive the water pump slightly
or use same size pulleys for 1:1 ratio.

 

i can't find a water pump pulley that would work that is smaller than 6 inches. Anyone know where to get one?

 

so I am going to put the fitting and the pulley on tomorrow. Should I use thread lock for the fitting on top, or use more of a thread sealant?
Any help would be great

 

Thread sealer