Water pump tension pulley - Defender Source
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  #1  
Old February 2nd, 2013, 10:12 PM
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Water pump tension pulley

Does anyone have some tips on how to loosen the water pump tension pulley to replace the belt? The pulleys pinch bolt sits right on top of the crank pulley and I am finding it impossible to get a flush 13mm socket on it. I've been able to get to it from the top with an extension, but because of the angle can't get a wrench or socket flush enough to turn it.



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  #2  
Old February 3rd, 2013, 07:48 AM
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I may have removed the fan when I did that one. I dont really remember them causing much trouble, only the PS pump.
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  #3  
Old February 3rd, 2013, 07:52 AM
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Cut the belt(s) off, which will give you some room to get at the tensioner bolt. You're replacing them anyway.
And it is a 1/2 inch not 13, at least all the ones I ever wrenched.
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  #4  
Old February 3rd, 2013, 01:53 PM
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Do I have to remove the fan to get the crank / water pump belt off? I don't see how else I could get it off ( besides obviously cutting it, but that only solves half the problem )
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Old February 3rd, 2013, 02:29 PM
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Quote:
Originally Posted by Surf90 View Post
Do I have to remove the fan to get the crank / water pump belt off? I don't see how else I could get it off ( besides obviously cutting it, but that only solves half the problem )
I recall all the tensioners are a bitch. The belt setup on these is the pinnacle of British ingenuity.

I do it with a wrench. You might need a shorter one or at least 12 points to get the swing.

I don't recall having to remove the fan to do this.
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  #6  
Old February 3rd, 2013, 02:33 PM
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Quote:
Originally Posted by leastonce View Post

I recall all the tensioners are a bitch. The belt setup on these is the pinnacle of British ingenuity.

I do it with a wrench. You might need a shorter one or at least 12 points to get the swing.

I don't recall having to remove the fan to do this.
Man, "a bitch" is an understatement. I feel like an idiot spinning my wheels down there. Bloody knuckles and frustration is all that I'm getting.
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Old February 3rd, 2013, 02:56 PM
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Originally Posted by Surf90 View Post

Man, "a bitch" is an understatement. I feel like an idiot spinning my wheels down there. Bloody knuckles and frustration is all that I'm getting.
I'm sure gynecology and motor mechanics where the same subject at British schools in the 60's, 70's and 80's when all this crap was created.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #8  
Old February 3rd, 2013, 03:04 PM
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Quote:
Originally Posted by leastonce View Post

I'm sure gynecology and motor mechanics where the same subject at British schools in the 60's, 70's and 80's when all this crap was created.
Ha!! Yeah. Quote of the day.

That's hilarious
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Old February 3rd, 2013, 03:08 PM
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Originally Posted by Surf90 View Post

Ha!! Yeah. Quote of the day.

That's hilarious
When you do eventually get this done know that compared to the power steering belt this one is easy!
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  #10  
Old February 4th, 2013, 08:52 PM
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Whoops. Meant to post this here (accidentally posted in tension thread):


I'm officially on day 3 of trying to get the idler pulley pinch-bolt loose for the crank belt. I've tried every tool at every angle and to no avail. I don't know what to do. I may have to drill it out from the opposite side?? I mean it is just sitting so tight on the alt pulley that I cannot get anything on it. I'm so frustrated.

Any last ditch suggestions??
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  #11  
Old February 4th, 2013, 10:24 PM
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Quote:
Originally Posted by Surf90 View Post
Whoops. Meant to post this here (accidentally posted in tension thread):

I'm officially on day 3 of trying to get the idler pulley pinch-bolt loose for the crank belt. I've tried every tool at every angle and to no avail. I don't know what to do. I may have to drill it out from the opposite side?? I mean it is just sitting so tight on the alt pulley that I cannot get anything on it. I'm so frustrated.

Any last ditch suggestions??
Post pictures... Does the workshop manual offer any clues?
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #12  
Old February 4th, 2013, 10:46 PM
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We did this a couple weeks ago, and I don't recall it being that difficult. You might want to PM ArmyRover and see if he recalls any magic or voodoo that was involved. IIRC getting that bolt off was much easier than some of the others....
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  #13  
Old February 4th, 2013, 11:04 PM
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Yeah I don't know if maybe the last time someone changed the bolts they rotated the pulley a bit much, but the bolt is virtually right on the alt pulley (barely enough room for the belt to pass underneath. I've tried every way from Sunday and I can't get it. Maybe if I can find a super slim wobble head socket, but it would have to be crazy slim. -- here's a photo from the manual, I would say the bolt on mine has half the space the image shows ..

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  #14  
Old February 4th, 2013, 11:34 PM
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I'm thinking wrong belt size or incorrect routing.


X2 on removing shroud and fan. Replaced my water pump (and all belts and hoses) just a few weeks ago and the fan/shroud out opened a ton a room. I think I untied mine with a regular flat wrench. It should not be that tight. Are you sure you're turning anti-clockwise (sorry... Nothing personal... I so that myself all the time! ). I did this without a shop manual, so this is not rocket science (once you've done it once).
If your bolts are frozen, soak them in wd-40/liquid wrench/etc twice a day for 2-3 days in a row. Heat should really not be necessary (well... I should not have had to cut the bolt holding the starter neither... ).
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  #15  
Old February 4th, 2013, 11:42 PM
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Have you tried using a crows foot on a long extension? Might let you get enough leverage to break it loose. Also, +1 on using a good penetrating oil..
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  #16  
Old February 5th, 2013, 12:00 AM
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Originally Posted by psykokid View Post
Have you tried using a crows foot on a long extension? Might let you get enough leverage to break it loose. Also, +1 on using a good penetrating oil..
Crows foot. That's a good call. I'll pick that up tomorrow. If that doesn't work ill pull the fan.

------ Follow up post added February 4th, 2013 09:01 PM ------

Quote:
Originally Posted by MonLand View Post
I'm thinking wrong belt size or incorrect routing.

X2 on removing shroud and fan. Replaced my water pump (and all belts and hoses) just a few weeks ago and the fan/shroud out opened a ton a room. I think I untied mine with a regular flat wrench. It should not be that tight. Are you sure you're turning anti-clockwise (sorry... Nothing personal... I so that myself all the time! ). I did this without a shop manual, so this is not rocket science (once you've done it once).
If your bolts are frozen, soak them in wd-40/liquid wrench/etc twice a day for 2-3 days in a row. Heat should really not be necessary (well... I should not have had to cut the bolt holding the starter neither... ).
Good thoughts. Thanks! I've been soaking it in wd40 and turning lefty loosey, but really can't even get a flush turnable socket or wrench on it.
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  #17  
Old February 5th, 2013, 12:16 PM
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I've found that Wurth Rost Off does a really good job as a penetrating oil for soaking tough fasteners, much better than good ol wd-40 or even PB Blaster..
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  #18  
Old February 5th, 2013, 12:32 PM
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A mix of acetone and atf is supposed to be the best penetrant.
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  #19  
Old February 5th, 2013, 12:54 PM
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Cut the belt off. Get a long piece of pipe or rod to use as a drift and whack the arm of the adjuster with a hammer to rotate it to a place where you can get a tool on it. Don't be spending days on that little SOB.
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  #20  
Old February 5th, 2013, 01:09 PM
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Take the fan off... FWIW I've encountered two defenders that had the wrong pulley fitted so that the bolt hit the belt.
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