My 98 disco has some serpbelt issues. It was worn and squeaking and I replaced it. After I change it I noticed it s walking back and forth on the tensioner pulley. The tach works intermittently and if I turn A/C it it runs true and noise is gone and tach is ok? Any help would be appreciated. I am guessing bad tensioner? Thanks, in advance

 

If the belt is "walking" on the pullies thenI would say bad tensioner.But I would double check the routing first though.
http://www.roverparts.com/TechTips/s...g_defender.cfm

 

Could be the bearings in the a/c clutch. See if you feel any play in it, It should be tight. Also look at the tensioners like spike said.

Willie

 

Tensioner and I would replace both the idler pulleys at the same time. Pretty common to see them all fail at nearly the same time.

 

My disco only has 74k and I routed belt the same as I removed it. I think tensioner and idlers are ok. There is no play and no separation on tensioner. I see from link that belt is routed incorectly. I will switch to proper routing and see what hapens. Thanks for the info.

 

All is good!! Proper belt routing worked. Thanks for the help!!!

 

Glad to here tht it worked.