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Cj5 Is It My Water Pump?

Discussion in 'Intermediate CJ-5/6/7/8' started by Candace, Jul 26, 2019.

  1. Jul 29, 2019
    sterlclan

    sterlclan Member 2022 Sponsor

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    Tim is spot on check the length from the gasket to the pulley surface mine had the wrong one when I got it and the belts were skewed. Had to find a guy that could read the book to find the right one.
     
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  2. Jul 30, 2019
    Candace

    Candace Member

    La Verkin, Utah
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    Well Chilly was right. None of the local auto parts places had the pump. I ordered one from a place they recommended. It will be here Wednesday. I will DEFINITELY check everything you all mentioned here before, and while I'm replacing it.

    Cross your fingers for me. I'll be hitting you up if I run into anything while I'm doing it.
     
  3. Jul 30, 2019
    Chilly

    Chilly Active Member

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    Did you check the build date on that 360? At some point, and I dont know for sure, the pumps changed in an important way. Because your engine is not native to the Jeep its difficult to know if its a ling snout or short snout pump. NAPA had the pump for mine, which is a long snout. Build date is coded into an aluminum tag on valve cover so even that is not 100% accurate to your pump style.
     
  4. Jul 30, 2019
    Lockman

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    Candace,
    While your waiting, It never hurts to spray Liquid Wrench (y) on any & all bolts & nuts that you will be removing. Even if you can't see the threads, spray around the shoulders & seats...... It's better than R & R ing Dry !
     
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  5. Jul 30, 2019
    Candace

    Candace Member

    La Verkin, Utah
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    Chilly,
    The engine is actually a 304, I believe. It's the V8. It is stock and came with the Jeep. I don't know if anything has ever been replaced on the Jeep. Nothing has since about 1997, when we got it. And before that it was an uncle's for a few years and grandpa's before that. He bought it new. So luckily I don't have any weird previous owner issues I hear people talk about all the time. It's just dealing with everything being about 48 years old and then it just sat for the last 6 years.
     
  6. Aug 1, 2019
    Candace

    Candace Member

    La Verkin, Utah
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    20190801_013036_resized_1.jpg
    I got the pump today. Just got Jeep into garage and was spraying the bolts with the penetrating stuff when I noticed that the thing the fan is connected to that the belt goes around is wiggly...is it supposed to be? I know I'm going to be taking it off, but it'd be nice to know if that's the way its supposed to be or not.

    I'm posting a picture of it. When I hold one of the fan blades I can wiggle it back and forth a bit.
     
    Last edited: Aug 1, 2019
  7. Aug 1, 2019
    Hellion

    Hellion Regurgitated

    Eastern TN
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    That’s the water pump pulley that Chilly and timgr were telling you to check and wiggle in posts #13 and #15.

    Is it really sloppy (loose)? I imagine the bearings in the pump housing are toast. A new one should not be wiggly but instead rather tight.
     
  8. Aug 1, 2019
    Chilly

    Chilly Active Member

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    The fan, spacer, and pulley all bolt to the water pump shaft. So a pump with worn out bearings will allow the entire assembly to wobble. It's fine, except the pump is shot. But you already knew that, so no worries.
     
  9. Aug 1, 2019
    Chilly

    Chilly Active Member

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    My reading on other sites is that 1972 was the transitional year, so post a photo of the pump once you have the pulley off. Maybe we can discern which it is. Good place to search for more AMC V8 info is the forum at Bulltear. Lots of water pump discussions. Most of them are AMC car guys but the forum is about the engines mostly so you can learn a lot.
     
  10. Aug 1, 2019
    Chilly

    Chilly Active Member

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    Here is a shot of my NAPA pump. It's 100% new so dont put too much stock in the casting differences, but might give hints.
    20190606_204946.jpg
     
  11. Aug 1, 2019
    timgr

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    I don't think it's as much of a watershed for this engine as "transitional year" would imply. The V8 CJ was new for '72, but Jeep was using these engines in other models before 1972, and AMC manufactured and sold them starting in 1966. You have to be careful and get the right parts for your year. Trust your eyes and instruments more than what you hear or read. The parts stores counter people sell a lot of parts, but they likely have never sold parts for your year and model and equipment of Jeep. Also, the aftermarket parts listings have many many mistakes, mostly benign errors in years of coverage and such, but many mistakes that are not.

    Jeeps are oddballs. AMC is an oddball manufacturer. The aftermarket parts listings for these oddballs are not vetted nearly as well as listings for say, Fords or Chevrolets. I would guess most of the errors start as transcription errors, or from incorrect assumptions by the person making or transcribing the listings.

    The best and most accurate parts reference is the factory Jeep parts book, provided (sold) by Jeep to the dealership parts departments so they could look up the parts and sell replacment parts for Jeeps at the dealerships. These books are out there (I have a few of these, none that covers your year and model) if you search and are willing to pay for them. The factory listings have a few errors, but not nearly as many as the aftermarket listings that your parts store will use.

    I believe the Jeep part number you want is 812 0130, which crosses to a GMB 1102908. This is the pump that RockAuto lists for your Jeep, and it matches what my parts books say.
     
    Last edited: Aug 1, 2019
  12. Aug 1, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Also, there's no education that matches up to experience. I develop control programs for complex scientific instruments every day, and sometimes teach scientists how to do what I do. I always tell them they have to pick a project and do it, if they really want to learn. I heartily encourage you to get under the hood, turn those wrenches and do your best. You will make mistakes, but you will persevere and learn.
     
  13. Aug 1, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Another suggestion - a pro would never do this - but you can drain the coolant, undo the hoses, unbolt and remove the radiator first. Be sure to protect the radiator whether you remove it or not. Any heavy object bumping the radiator will put a hole in it, and then you'll have to deal with that too.
     
  14. Aug 1, 2019
    Candace

    Candace Member

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    20190801_100153_resized.jpg Well, I'm definitely doing it myself. Because I want to be able to do it, but also because I just plain don't have the money to pay someone else to. I wasn't planning on removing the radiator. I'll be super careful. If it seems like I need to take it out, I will. But once the fan and pulley are off I will have almost 8 inches of room.
    Now I'm super nervous that I don't have the correct pump. Mine says GMB, but that is not the part number on the packing slip. I entered all my info online when I ordered it and they sent it out. Ugh. I'm going to try not to stress until I get the old one off and compare them.
     
  15. Aug 1, 2019
    Candace

    Candace Member

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    20190801_100346_resized.jpg Here's the whole engine...
     
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  16. Aug 1, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Looks like a Jeep! (y)

    A low-options example, except for the V8. Skyway Blue. What's the seating, buckets, bench, color? Back seat? Does it have a top?
     
  17. Aug 1, 2019
    Candace

    Candace Member

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    timgr,

    if you look at the introductions page I posted the original sales slip from when grandpa bought the Jeep. It shows the options he got. And his discount of $5 for no right side mirror.
     
  18. Aug 1, 2019
    PeteL

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    Fair enough - but getting the fan out presents an excellent opportunity to puncture a radiator tube. Take your time.
     
  19. Aug 1, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Well, was not suggesting you not do it yourself. Quite the contrary. A pro would not remove the radiator because it would cost too much time. They are paid by the number and difficulty of jobs they complete in a day (by "flat rate"), so they are never going to take any extra steps.
     
  20. Aug 1, 2019
    Candace

    Candace Member

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    I know you weren't suggesting that I don't do it myself. I was answering your "encouragement to get under the hood" by saying I'm definitely going to do it myself. I know I can do it and I want to learn how. It's a pretty awesome feeling to tell people that you've done all the work on the Jeep yourself. Especially when you're a girl.

    It looks like only the two hoses and four bolts to remove the radiator so it shouldn't take long, either. If I feel like I need to, I'll take it out. I'm going to start it in a couple of hours.
     
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