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Old 06-17-2018, 04:59 PM   #1
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3126 coolant pump replacement

02 DutchStar, Cat 3126 in a Freightliner chassis, side radiator.

When I started up this morning my water pump decided to whistle a [not] happy tune. Sounded like a belt slip at first, but all belts were moving ok. Shut down and restart a couple of times, but the screech remained. When I tried the spray bottle test the water pump pulley was sizzling hot, even before the engine was up to temp.

So, bearing shot, replacement time. There are a couple of well reviewed truck shops here. Weíre Fulltimers, on the road in travel mode, in Lamar, CO. I have neither a place to work on it, nor the inclination to take on the job in 90+ degree heat, so Iíll pay.

Can anyone hazard an estimate of shop time for this? Havenít talked to anyone yet, donít even know the local rates. Just wondering how much time a reasonable professional would need for this job.

Thanks, all, and Happy Fatherís Day!!
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Old 06-17-2018, 05:39 PM   #2
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I can't help you with shop hours question, this video does it all in 9 minutes.

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Old 06-17-2018, 07:12 PM   #3
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I can't help you with shop hours question, this video does it all in 9 minutes......

Thanks for that... I was planning to poke around YouTube this evening. Looks pretty straightforward. Even with prep and clean up time, a couple of hours ought to be plenty for a pro.
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Old 06-18-2018, 12:19 AM   #4
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Thanks for that... I was planning to poke around YouTube this evening. Looks pretty straightforward. Even with prep and clean up time, a couple of hours ought to be plenty for a pro.
Well,
That's what you would HOPE for. There's been a couple of threads on here where the water pump tensioning bolts have seized and broke off. Those can be a nightmare and, your "two hour" job can turn into several hours of pure pain. Now, just how common is a situation like this, not a clue. All you can hope for is everything goes as planned, with no issues. I just did it on mine. I did the fan bearing, belts, hoses, twin-thermostats, and a few other odds and ends. My job took me days because I was in no hurry and, mine is also a rear radiator.

So, hope yours goes well and you have no issues.
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Old 06-18-2018, 04:58 PM   #5
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Interesting, I had to replace the C-7 in my RV a couple of years ago. They exchanged some parts including the water pump. I asked about that and was told the water pumps are bullet proof. Well many are but yours wasn't, sorry to hear that especially since my original water pump has over 170K miles on it.
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Old 06-19-2018, 12:13 PM   #6
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Interesting, I had to replace the C-7 in my RV a couple of years ago. They exchanged some parts including the water pump. I asked about that and was told the water pumps are bullet proof. Well many are but yours wasn't, sorry to hear that especially since my original water pump has over 170K miles on it.
Hey Bob,
If you're speaking at me, yeah, I keep hearing that diesels are zillion mile engines and so is all the parts on them. But, as reported, my water pump went out at or around 80K. And the really, really good part, it showed it's problem RIGHT IN MY RV GARAGE! I went to move the coach out to clean the floor and what the he... was this? A very large puddle of PINK on the floor. Hmmmmm. Not good. So, using my TV taught NCIS investigative talents, I tasted the PINK and, yep, it's anti-freeze. So, out came everything. The repair and replacement of all items went smoothly.
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Old 06-20-2018, 03:37 AM   #7
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.....I asked about that and was told the water pumps are bullet proof.....

Yeah, well, not 100% bulletproof. But mine went 16 years and 79K miles. Interestingly, when the tow was hooking up the pump was still turning, albeit screeching. At the repair shop I started up to back it into the desired work position. It was running for about a minute or so, and in that time the pulley seized, rock solid.
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Old 06-20-2018, 07:52 AM   #8
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Betty and I did it on the side of the road in Mexico by ourselves but the main problem for us was the radiator and CAC that had to be removed first by two old wrinklies.
Side radiator would be a piece of cake.
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Old 06-22-2018, 10:41 AM   #9
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Betty and I did it on the side of the road in Mexico by ourselves but the main problem for us was the radiator and CAC that had to be removed first by two old wrinklies.
Side radiator would be a piece of cake.
Wow Tony - that's a story I 'd like to hear in more detail (over a couple of beers).
You must have a fully stocked mechanic's workshop in your coach.
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Old 06-22-2018, 11:41 PM   #10
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Wow Tony - that's a story I 'd like to hear in more detail (over a couple of beers).
You must have a fully stocked mechanic's workshop in your coach.
You betcha. I too would like to hear that. Getting my water pump off took a whole lot of tools and some pretty good patience. Getting my radiator and CAC out of our coach is not too tough. Primarily 'cause the rear grill is removable which, makes for a larger opening through which, both of those can be more easily removed. But, even though I remove them, one at a time, it still takes a couple of gorillas to do it. The wife would never be able to handle the awkwardness and weight. That's nice work Tony.
Scott
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