Having a lot of trouble with this device. I cannot get the belt tight enough to make the alternator work. Do I need to completely loosen the bolt to get the pulley to move up enough? When the ac is cut on there is a squeeking noise from the belt.Basically I need someone to go over with me step by step the way to make the pulley work. The alternator went in fine, but now this is a problem. Please help and thanks in advance.

 

You neede to replace it, they fail with time. Also replace both idler pulleys which also are known to fail.

 

Mike,
I have about 90k on my truck (95). At what point should I replace the Idler and Tensioner Pulleys?

TIA
matt rickman
fort collins, CO

 

theres no replacement interval on these things, its a replace when bad deal, if youre not hearing a belt squeal or whine, then dont worry about it... also, you shouldnt need to loosen a bolt at all, the tensioner just rotates on itself, it uses a 15 mm wrench on the pulley, move it clockwise, and the belt will loosen, now if youre having a problem with it not getting tight enough you might not have the tensioner set up right, or the belt routed wrong... theres a locating peg on the back on the tensioner, part without the pully, it goes into a hole on the bracket. take the belt back off and make sure everything is set up correctly, also, what belt are ou using, is it new, and are you sure its the proper length?

 

I replaced my first set while still under warranty, around 46,000 miles.

 

Could you please help me by trying to describe the exact location of the bolt you loosen to loosen the tension pully. Someone said to loosen to get the belt off now I need to tighten it to get the belt back on. Also I took a picture of the belt route before I touched anything and it didn't match the link of proper belt routing that Spike555 posted for me. I don't see how that is possible seeing as how the car has gone 65k miles with this belt route. I even thought about changing the belt route but something told me not to and as I looked at it (the diagram) it seemed as though it wouldn't even go that way due to something blocking it. Anyways if you could help me find the part of the tension pulley that needs to be loosened and tell me how it should behave as I loosen and tighten it I would greatly appreciate it.

If there is an angry tone to my post I am sorryI am just pissed at the Discovery, I really am grateful for all the help I have received on this forum. You guys are great.

 

http://www.roverparts.com/TechTips/s...g_defender.cfm
The diagram that I sent you IS the correct belt routing for a DI.
I replied to your other post too.
You need to put your wrench on the nut in the middle if the pully. (wheel)
Push down on that nut and the whole tensioner will piviot down, then put the belt over top of the pully and let up on the wrench.
There is more than one way to route a belt on a DI but only one right way.
If you continue to have trouble you might want to think about printing the belt routing diagram and taking it to your local indy shop, they will install the belt the correct way for you.

 

I just had to replace thetensioner due tothrown bearings (should have cleaned up better under the hood after the last offroad outing.) There is no bolt to loosen and tighten to tension the belt. It is a spring loaded tensioner. The belt is routed as illustrated in the page posted by Spike. Route the belt as shown over all the pulleys with the exception of the alternator. Since it is the smallest it will be the easiest to get on when you compress the tensioner. Take a 15mm box-end wrench and put it on the bolt on the pulley. With your strong hand push down (or to the right) on the wrench.You should be able to move the tensioner about 4 inches. Holding the tensioner in this position shouldgive you enough slack to get the serpentine belt over the alternator pulley.

 

You sure you have the right belt ???

 

Man, just be sure on your installation..and another thing is that you should double check your alternator brackets after the repair or the replacement and dont just focus on the missing bolts and proper belts to be installed.