1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Cj5 Is It My Water Pump?

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

  1. Aug 3, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    Thank you. I'll credit the quality to Samsung Galaxy.

    I have a torque wrench, btw... 20190803_111851_resized.jpg 20190803_111851_resized.jpg

    I've never used it. But I've loaned it out. And sometimes I've been told it's too big for their job...so I might need a smaller, and cheaper one.
     
    Hellion likes this.
  2. Aug 3, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    I know it's required on heads. That's what I've loaned my wrench for. I've just never heard it used on other things. But in that manual you posted the link to it has torque specs.
     
  3. Aug 3, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    Are those pics good enough to decide if you think Chilly's pulleys will work? I've got to go down to the high school for a bit and help the auto shop teacher get the tool room ready for school. (repayment for him letting me use the rack and steam cleaner to fix a couple things on my blazer)
     
  4. Aug 3, 2019
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    20,914
    My '72 TSM says 10-15 ft-lbs for the water pump. That's not a lot: 10 to 15 pounds at the end of a foot-long lever. You have a fairly small bolt into a threaded hole, possibly in aluminum. My mechanic friend would not have measured torque, but he had years of experience at how tight these bolts should be (and he needed to go fast). I have done this job without measuring torque, though now that the spec has been pointed out, I probably would measure. Plus I have a couple of torque wrenches to choose from.

    Barring that, if you use a 6" ratchet handle, that's 20-30 lbs on the end. Get your bathroom scale, push on it and see what 30 lbs of pressure is like, and copy that. Probably accurate enough for this.

    What's the minimum setting on your torque wrench? Typically they are most accurate in the middle of their range. A long handle like that would suggest it's for something like cylinder head cap screws, at 80-85 ft-lbs.

    Interesting the alternator bracket bolt is 18-35 ft-lbs and the alternator to bracket nut is 30-35. So get that adjuster bolt nut good and tight. Plus there's no great penalty if you break or strip the alternator mounting bolts - just get a new one. The bracket bolts go into the block, and stripping one of those would be bad. So tighten enough to squash the lock washer, a little more and no further.
     
    Last edited: Aug 3, 2019
  5. Aug 3, 2019
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    20,914

    I would take the pulley off, set it down flat on a table and measure the overall height with a tape like you did earlier for the hub height. Same for the crank pulley. Compare notes then.
     
    Last edited: Aug 3, 2019
  6. Aug 3, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    Is the crank pulley the one under the one that goes on the water pump?
     
  7. Aug 3, 2019
    Chilly

    Chilly Active Member 2019 Sponsor

    Joined:
    Mar 12, 2007
    Messages:
    1,443
    Yes
     
  8. Aug 3, 2019
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    20,914
    +1 - yes, it's on the crankshaft end, aka "crank."
     
  9. Aug 3, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    While I have heard the word "crankshaft" a million times, I don't actually know what or where it is...:shrug:
    But that's ok. If I get too much new information I'll probably get overwhelmed and forget half of it .
    I'm willing to accept that it is what you say.

    Plus if I picture a cranksaft, I see someone from the early 1900's turning a handle to crank their car.
     
    Last edited: Aug 3, 2019
  10. Aug 3, 2019
    Chilly

    Chilly Active Member 2019 Sponsor

    Joined:
    Mar 12, 2007
    Messages:
    1,443
    Check this out. Well done description, and you'll be hard pressed to find finer socks.

     
    Hellion likes this.
  11. Aug 3, 2019
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    20,914
    You have the right idea. Just like a crank turns up and down motion into rotary motion, the crankshaft turns the up and down motion of the pistons into rotation.
     
  12. Aug 3, 2019
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,836
    That would be "the crank" not the "crankshaft."

    But it acts as a temporary extension of the actual crankshaft and performs the same function - only using muscle, not gasoline.
     
  13. Aug 4, 2019
    Chilly

    Chilly Active Member 2019 Sponsor

    Joined:
    Mar 12, 2007
    Messages:
    1,443
    20190804_093006.jpg
    20190804_093130.jpg

    2-3/4" overall height. Candace, measure yours and let us know.
     
  14. Aug 5, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    How do I get that big bolt thing in the middle undone? it just wants to turn the pulley... 20190805_123356_resized.jpg
     
  15. Aug 5, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
  16. Aug 5, 2019
    sterlclan

    sterlclan Member

    exploring the...
    Joined:
    Feb 21, 2009
    Messages:
    3,273
    put the bolts back in and hold the pully with a strap wrench. an old v belt wrapped around a solid object can substitute for a strap wrench.
     
  17. Aug 6, 2019
    Chilly

    Chilly Active Member 2019 Sponsor

    Joined:
    Mar 12, 2007
    Messages:
    1,443
    Are you measuring that pulley with three small bolts and one big one in the center? That's the crank pulley. Please measure the smaller pulley that was on your water pump.
     
  18. Aug 6, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    ooooooooohhhhhhhh.....ok.....

    It's 2 3/8"
     
    Hellion likes this.
  19. Aug 6, 2019
    Chilly

    Chilly Active Member 2019 Sponsor

    Joined:
    Mar 12, 2007
    Messages:
    1,443
    Ok, so yours is 3/8" shorter, just about making up for your pump's shorter hub height. I think your later model pump should work OK with my later pulley. I'll mail it tomorrow.
     
  20. Aug 7, 2019
    Candace

    Candace Member

    La Verkin, Utah
    Joined:
    Jun 15, 2019
    Messages:
    59
    What would happen if I put spacers behind my bottom pulley to bring it out even with the one on the water pump?
    The alternator already had a spacer behind it and the pump came with two sizes of spacers. So the alternator would need the longer one instead of the short one that's on there now. And I already have some here I could use for the pulley...
     

Share This Page

New Posts