Corect V belt tension 3.9 - Defender Source
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  #1  
Old October 15th, 2012, 09:01 PM
wantone
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Rick Thompson
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Corect V belt tension 3.9

Hi guys, what is the correct belt tension for the alternator, water & power steering pump belts?
I have changed belts on other cars before but not on the D-90 & know how "delicate" they can be sometimes.....

Thanks!
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  #2  
Old October 16th, 2012, 09:33 AM
Naplm00
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Matthew
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i put all vbelts on all my cars to 1/2 in deflection when pushing on the longest unsupported area of the belt


not an exact science , but it hasn't failed me
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  #3  
Old October 16th, 2012, 09:42 AM
wantone
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thanks matt, thats what i typically do on belts as well, just wanted double check that rover did not have some funky specs
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  #4  
Old October 16th, 2012, 09:57 AM
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Jason Lavender
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Quote:
Originally Posted by Naplm00 View Post
i put all vbelts on all my cars to 1/2 in deflection when pushing on the longest unsupported area of the belt


not an exact science , but it hasn't failed me
x2 this is what I did exactly when I replaced the A/C belt on the 110, and recently when I replaced the alternator on the 90...about 1/2" deflection and likewise this worked for me on both trucks.
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  #5  
Old February 2nd, 2013, 08:21 PM
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How in the world did you guys loosen the belt for the water pump / crank?? I can not for the life of me get to that idler pulley loosening nut. Is there a trick or another place I can loosen that belt??

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Edit: my loosening nut is sitting right on the crank shaft pulley. I can't get an angle on it
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  #6  
Old February 2nd, 2013, 09:42 PM
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Steering pump takes 2 people.
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  #7  
Old February 4th, 2013, 08:28 PM
MonLand
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Quote:
Originally Posted by rover4x4 View Post
Steering pump takes 2 people.
It's probably MUCH easier with 2, but you can do it with one person.
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  #8  
Old February 4th, 2013, 08:31 PM
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Quote:
Originally Posted by MonLand View Post
It's probably MUCH easier with 2, but you can do it with one person.
True. I did it the other night. Loosen it all up and use the alternator to get it as tight as possible then tighten the power stewing pump down. Then adjust the alt belt
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  #9  
Old February 4th, 2013, 08:50 PM
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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.
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  #10  
Old February 4th, 2013, 09:23 PM
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Take the fan off cut the belts use a box end wrench on the nut if not apply some heat with a small butane torch to the treaded side or you and try tapping the bracket to rotate it so you can access the bolt easier...... no matter how many i do that's the one job i still hate
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  #11  
Old February 4th, 2013, 11:23 PM
MonLand
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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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I have an ex MoD and an ex wife. The two no longer conflict with each other.
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