Cummins Water Pump Cost: USA Shop and DIY Prices

You walk out to the truck in the morning and there is a green puddle under the front. Or the temp gauge that always sat dead steady starts creeping up on a long grade. Nine times out of ten on a Cummins, that is the water pump telling you it is done.

A Cummins water pump costs $40 to $420 for the part, and most USA shops land the full job between $400 and $800. Do it in the driveway with a good mid priced pump and you are out the door for $150 to $250.

The good news is this is one of the cheapest, easiest fixes a diesel pickup can ask for. The bad news is shops will happily charge you like it is a big job. Here are the real numbers.

What the pump itself costs in the USA

This is where your biggest choice lives, and the price spread is wild.

Budget aftermarket pumps run $40 to $115. Generic brands on the big online marketplaces go as low as $40. These bolt on fine. Some last years. Some do not. It is a dice roll, and the dice are loaded against the cheapest ones.

Gates pumps are the sweet spot for a lot of driveway guys. The Gates 43526 for the 5.9 sells for $57 to $87 at online diesel and parts vendors, and the Gates 42291 for the 2007.5 to 2012 6.7 runs about $110 to $115. Real warranty, correct fit. One caution on the 42291: some listings ship with a plastic impeller, so check before you buy, or look at the Alliant and XDP options below for a guaranteed metal impeller. If you hate overpaying as much as I do, this is probably where you land.

Alliant Power pumps sit in the middle. The AP63533 for the 2007.5 to 2012 6.7 costs about $131 to $149 at diesel shops online, and their parts tend to just work.

XDP Xtra Cool pumps cost around $66 and come with an iron impeller, which matters. I will explain why below.

Genuine Cummins pumps are the top of the pile. The Cummins 5473238 that fits 1989 to 2012 5.9 and 6.7 engines sells for $325 to $420 depending on the vendor. The Mopar branded equivalent, part 68461455AA, goes for $300 to $320. Bullet Proof Diesel also makes an all aluminum pump with a metal impeller for $400, if you want the last word in pump strength.

That genuine vs aftermarket math comes up everywhere on these trucks. We ran the same comparison for fuel filters if you want the full version of the argument.

The plastic impeller story, or how I paid twice

Here is the thing most parts counter guys will not tell you. A lot of the original equipment pumps and cheap replacements came with a plastic impeller. Plastic, on a part that spins in hot coolant for a hundred thousand miles. Over time the plastic cracks around the hub and spins free of the shaft. The pump looks fine from the outside. The belt is turning. But inside, nothing is moving coolant. Your temp gauge climbs and you are standing there scratching your head because the pump is brand new.

I learned this the hard way. Ask me how I know. I put a cheap pump on a 12 valve years ago, drove it one summer, and got to do the whole job again in October because the impeller had let go.

So whatever brand you buy, get one with an iron or steel impeller. The XDP Xtra Cool at $66 has one. The Bullet Proof Diesel has one. The Gates 43526 uses stamped steel. If a listing does not say what the impeller is made of, assume plastic and keep shopping.

What a shop charges for a Cummins water pump replacement

A professional shop books this job at 2 to 4 hours of labour. Independent diesel shops usually land around $100 to $150 an hour in most of the country, and dealers more often $150 to $190 an hour. Those are typical ranges, not written quotes, so your town can land higher or lower. Do the math:

Independent shop: pump at their price ($100 to $300) plus 2 to 3 hours labour ($200 to $450) plus coolant ($30 to $60) = $400 to $800 out the door.

Dealer: same pump, higher labour rate, and they will want to add a thermostat and belt while they are in there. $600 to $1,000 is not unusual.

Total job cost at a shop lands at $400 to $800 for most trucks.

The driveway version: DIY Cummins water pump cost

The 5.9 and early 6.7 water pump is one of the legendary easy Cummins jobs. Drain the coolant, slip the belt off, pull two bolts, and the pump comes out with its rubber ring seal. A first timer finishes in an afternoon.

Your driveway parts list looks like this:

Pump: $57 to $150 for a good one with a metal impeller. Coolant: A 6.7 holds roughly five to six gallons. A jug of concentrate plus distilled water from the grocery store runs about $40 to $60 total. Use the right coolant for your truck, the orange OAT type on the newer ones, not the old green stuff. If you are doing this job in the fall, our winter diesel survival guide covers the cold weather side of coolant care and block heater prep. Total driveway cost: $150 to $250, and you keep the $400 to $500 of labour money in your pocket.

While you are in there

This is the part the cheap guys skip and the smart guys never do. You have already drained the coolant and you already have the belt off. The labour for every item on this list is basically zero right now.

Thermostat: $15 to $40. The thermostat lives right there and it is the other half of your cooling system. If it is original and the truck has real miles on it, replace it. A stuck thermostat will overheat a truck just as dead as a bad pump, and doing it later means draining everything again.

Serpentine belt: $30 to $60. You took it off anyway. If it has cracks, glaze, or more than 60,000 miles on it, put a fresh Gates belt on. Keep the old one behind the seat as a spare. Ask me how I know that trick too.

Hoses and clamps: $20 to $50. Squeeze the upper and lower radiator hoses. If they feel crunchy or soft and mushy, now is the time. Hoses are cheap. Roadside blowouts are not.

Coolant flush: You are refilling anyway, so this is the moment to do a proper flush if the old coolant looked rusty or murky. Fresh coolant protects the new pump seal and the whole system.

Add it all up and the "while you are in there" extras run $65 to $150 in parts. That is money well spent, because paying for a second coolant drain is the most annoying bill in truck ownership.

How you know your Cummins water pump is failing

Before you spend a dollar, make sure the pump is actually the problem. The classic signs:

Coolant weeping from the pump snout. There is a small weep hole in the pump housing. When the internal seal starts to go, coolant dribbles out of it. Look for green or orange crust around the pump. If you see that, the pump is done. No debate.

Temp gauge climbing under load. If the truck runs fine around town but the needle creeps up on grades or when towing, coolant is not circulating right. Could be the thermostat too, which is why you replace both.

A bearing growl or wobble. Grab the pump pulley and try to wiggle it. Any play, or a rough grinding noise when you spin it, means the bearing is on its way out.

One heads up: on the 2013 to 2017 trucks there was a factory water pump recall, recall T51, covering about 444,000 US trucks. The problem was a Concentric pump without a vent hole whose bearing could overheat, and the fix is a free dealer inspection and replacement. Not every truck is affected, so if you own one of those years and have never had the pump done, call the dealer with your VIN before you spend your own money. Free beats cheap.

My recommendation

For most 5.9 and 6.7 owners in the USA, here is what I would tell you over the fence.

Buy a Gates, Alliant, or XDP pump with a metal impeller for $57 to $150. Do the thermostat, belt, and fresh coolant with it. If you can turn a wrench, do it in the driveway for $150 to $250 total and be done before the game starts. If you cannot, find a good independent diesel shop, bring your own pump if they allow it, and expect $400 to $800 out the door.

The genuine Cummins pump at $325 to $420 is a fine part and I will not talk you out of it if money is no object. But for a stock or lightly worked truck, a $66 iron impeller pump and the money you save will cool the engine exactly the same. If your truck runs a tune, the cooling system works harder, so keeping it healthy matters even more. Our emissions intact tuning guide shows how to add power without deleting. Spend the difference on the thermostat, the belt, and a steak dinner.

For more on keeping your Cummins healthy long term, our 6.7 Cummins reliability guide covers the other weak points worth watching.

Frequently asked questions

How much does it cost to replace a water pump on a 6.7 Cummins?

Expect $400 to $800 at a shop, parts and labour together. The pump itself is $40 to $420 depending on the brand. In the driveway with a mid priced pump, fresh coolant, and a new thermostat, most owners spend $150 to $250 total.

Should I buy a genuine Cummins water pump or an aftermarket one?

A genuine Cummins pump is $325 to $420 and is excellent. But quality aftermarket pumps from Gates, Alliant, or XDP with an iron or steel impeller cost $57 to $150 and last just as long for most trucks. Avoid no name pumps with plastic impellers, because that is the part that fails.

Can I keep driving with a failing water pump?

Not far. A small weep at the seal can turn into a real leak fast, and a 6.7 that overheats is a very expensive problem. If the temp gauge is climbing or you see coolant under the front of the truck, park it and plan the fix. A tow is cheaper than a head gasket.

How long does it take to replace a water pump on a Cummins?

Shops book 2 to 4 hours for the job, and the pump itself comes off with just two bolts, so most of the clock goes to draining, refilling, and burping air out of the cooling system. XDP lists a customer average of about an hour and a half for experienced owners. A first timer in the driveway should plan on an afternoon.

What are the symptoms of a bad water pump on a 6.7 Cummins?

Coolant crust or drips around the pump weep hole, the temp gauge climbing under load or while towing, and a growling bearing or wobble in the pump pulley. Any one of those means the pump is done. Park the truck and plan the fix before it overheats, because a tow is cheaper than a head gasket.