Mine needs to be replaced, leaking around the shaft and maybe the gasket too. Some pinkish deposits found. Fortunately it only took about a gallon of coolant to cover the sight glass in the header tank. . For a moment I was worried that more has leaked out. NAPA thinks they have found two. He said that they have different shaft lengths. I haven't had time to look on the pump for a number. Searched the forum and Barry's website and didn't find anything. Anyone know the correct part # for a 1996 Cummins C8.3-300? Of course I just replaced the coolant 6 months ago. $188 plus tax for the pump.
Unless Foretravel did something unique which is unlikely, go to Cummins QuickServe Online and enter your engine serial number.
Will do, but have to wait until tomorrow. Thanks.
Here's the QuickServe water pump page from my engine. Looks like they list 2 different part numbers. I found one online vendor that had a pump that crossed to one of the numbers (3802081). 3rd row, on the left - says it is a "short nose" pump.
Don't know if any of this is helpful, but for what it's worth...
http://www.agkits.com/cummins-water-pumps.aspx
If you want to re-use your antifreeze, drain it into a clean container before removing water pump.
Replacing the water pump may be something you can do yourself, if so inclined.
It is a very common part and easy to replace, 3 bolts. 'Cept for the coolant issue mentioned by Barry and Cindy.
Yup, the water pump on the C engine is really an easy replacement. Will take longer to drain and replace the coolant than to replace the pump.
As to whether to re-use the coolant-- depends on its age and condition. Particularly if you find that the pump failed and put metal in the cooling system, best to flush and change it!
Thanks to everyone for all the good suggestions. I plan to replace the pump myself and will try to reuse the coolant if possible as it has only been 6 mo since I changed it. If I am unable to keep it clean will buy new.
Jerry......a tip.....when you replace the coolant into the radiator, leave the coolant filter a few turns loose and as you fill..... just as some coolant starts to exit the filter tighten it down and finish topping off the radiator. You will have no air in the system and it is very simple.
Took another look today at the water pump and stupid me there was a part # visible that I could read. A bit hidden behind the pulley, but no major contortions required. I think it is the original, made in England, 3905357. I then went to NAPA and bought the one that was shipped in. Of course it is made in China, but does look like it will fit. Distance from the plate to the pulley the same and same diameter pulley. To hot to do anything, Came home and registered for Cummins Quick Serve. Their numbers are totally different, even the older numbers that have been superseded. Cummins QuickServe Online | COLA (https://quickserve.cummins.com/qs3/portal/parts/option_detail.html?path=/qs3/parts/99/z/08.01/wp9002) They list the pump as WP9002 and then 3802081 and 3929615. Then I selected a pump and o-ring seal and put it in a cart, and could not find a price or way to check out. Maybe as a free member I am not allowed to buy anything. The photos are from my phone, 1st time doing that. Probably will not be able to read the number on the pump. I am keeping an eye on the belt and have a spare. No bits missing, but lots of cracks. Still deciding whether to keep the Napa pump or get something else.
I'm pretty sure if you went to a Cummins dealer and bought their official genuine Cummins branded water pump...it would be "Made In China". Thats the way it is with their mechanical lift pumps. I (personally) would not be afraid to go ahead and use the NAPA part. I don't think you will find anything any better, or substantially different, from other suppliers.
The original factory installed lift pump on our engine, and the "Made In China" replacement. It works fine - does the job. ^.^d
The belt is long overdue for a change. The rule is one crack per inch for each rib for a wear limit. So, an eight ribbed belt could have 8 cracks per inch as the limit.
Gates green stripe fleet belts are great. Do an online search for the best price delivered and get two. Prices locally are much more.
Example only: Serpentine Belt-FleetRunner Heavy Duty Micro-V Belt GATES K080525HD | eBay (http://www.ebay.com/itm/Serpentine-Belt-FleetRunner-Heavy-Duty-Micro-V-Belt-GATES-K080525HD/171750999645?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D41376%26meid%3D4a690b6f307142dba0ff0ba2cd75d415%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D261943190966)
Pierce
It took a few days, but the pump, and belts have been replaced. I only work in the 80 -90 degree cool of the morning. Yes the hard part was removing and replacing the coolant. Took over an hour to drain as I had to stop twice when my 5 gal buckets were almost full. The buckets had lids, so I could keep it clean and reuse the coolant. The engine block was a little rusty under the pump flange, cleaned that up and applied a very thin coat of grease on the block and pump where they mate. Also painted the outside of the new pump as it was not painted. The old pump was just leaking at the shaft. New pump looked like the old pump except no edge ridge on the pulley, an improvement as it is easier to get the belt on. Both pumps have a stainless steel impeller. Went for a test drive, no leaks and normal temperature. Found the easiest way to replace the coolant was to tie a bucket to the ladder and siphon the coolant into the tank fill. Thanks for the suggestions.
Jerry, After you run that new pump for a while be sure to check tightness on the lower bolt where the strap from the alternator is. Vibration tends to loosen that bolt and if not caught will wallow out the threads. BTDTGTTS.\
Gary B
Will do, I used new bolts of the same type, and torqued to the value in the engine manual.
Good job, wish I was smart enough to paint my new water pump before I'd installed it.
Hello Jerry, I've never been sold a bad part before from NAPA prior to just changing two months ago all fluids, filters, belts, misc. hoses, tensioners, water pump, radiator cap, fuel solenoid, and lift pump as preventative measure before a 2,500 mile round trip to LAX and back to Portland and down to Eugene, OR. with my newly acquired U295. The fuel solenoid kit, the lift pump, and the OAT "lifetime" coolant, I bought from Cummins, all the rest of the parts were from NAPA. The tensioners were bouncing pretty bad at idle and I knew all needed to be changed. Got home from trip and noticed allot of sediment by weep hole (lost about 5 inches of coolant in overflow bottle) coming from the new replacement Napa pump. NAPA here is exceptional, they apologized, and exchanged the pump. This replacement pump was identical to the one that leaked, decided to return it for a refund before installing, and buy the Cummins pump instead for my own crazy peace of mind, installed myself, approx same cost. Previously (1992 Signature) on another Cummins 6C8.3 had worn water pump causing fraying of two newly installed Napa XL Green Stripe serpentine belts (in less than 200 miles). Had local reputable shop take belt off, check water pump and alignment and plane of belt on all surfaces, they said all was ok. Even after paying for this inspection at a respected local diesel truck repair shop, I listened to my trusty tech who said he would still "replace the water pump". I did so, and no fraying of new belt. His experience I will always value.
The water pump you got from Cummins - where was it manufactured? Did it appear to be different from the NAPA (China) pump in any way?
The impeller was different, the impeller was more cone shaped, I was told to prevent cavatation, the Cummins pump was mfg in Mexico.