Thread: noise from either belt or pulley

well just found out its tension pulley which is the problem got prices now are they a pain to install yourself? Is it of matter me just undoing the one nut and pulling her off?

Originally Posted by Disco Sim

well just found out its tension pulley which is the problem got prices now are they a pain to install yourself? Is it of matter me just undoing the one nut and pulling her off?

Yep, really easy to do yourself.

Relieve the tension in the serpentine belt at the tensioner
take belt off or just move out of way
undo bolt that holds tensioner onto front of engine
remove old tensioner, but note orientation
replace with new one, installing same way as old one came off
do up bolt
relieve tension again (like removing belt)
and put belt back on.

Should take 5-10mins.

Hey Disco Sim,

Might be worth investigating a little further. Something more sinister may be brewing.

Maybe it was just the tensioner - easy fix - but...

Maybe the tensioner is bottoming out with the oversized belt. Check your belt sizes. There are two length of belts - 1580 and the 1595 - because there are two alternator pulley sizes out there. My disco 97 needed the 1580. The tensioner marks should line up when you put the correct belt size on. I use DAYCO belts (the "1580" size is actually 7PK1575, ERR5911).

Most importably - Check out your harmonic ballancer pulley - the big one at the bottom. Keep your eye on it when the engine is ticking over - make sure it is running dead true (with the belt installed and the tensioner on). With the belt off, give the balancer a wobble. It should stay firm. The nut should always be dead tight (clockwise to tighten).

I had just found that my balancer loosened itself and was flogging about. It has now knackered the crankshaft. 300tdi flogged dampener and crank


Cheers

thank you all for your responses i got the belt from land rover in port melbourne now i hope they know what they are doing there cause i told them the make model and the rest of the info and they gave me a belt. Now i can see the marks on the pulley and they dont line up and the tension pulley jumps around a lot when in idle but with acceleration it stops vibrating gotta love learning new things

Originally Posted by horgan

Maybe the tensioner is bottoming out with the oversized belt. Check your belt sizes. There are two length of belts - 1580 and the 1595 - because there are two alternator pulley sizes out there. My disco 97 needed the 1580. The tensioner marks should line up when you put the correct belt size on. I use DAYCO belts (the "1580" size is actually 7PK1575, ERR5911).

Didn't the belt size change after a certain vin number?

Originally Posted by Disco Sim

thank you all for your responses i got the belt from land rover in port melbourne now i hope they know what they are doing there cause i told them the make model and the rest of the info and they gave me a belt. Now i can see the marks on the pulley and they dont line up and the tension pulley jumps around a lot when in idle but with acceleration it stops vibrating gotta love learning new things

I also just checked mine and found neither Discos I have, had the marks on the tensioners line up?

Horgan, are you sure the marks are meant to line up? If so, I have two Discos with the wrong length belts?

just checked out the rave cd and it stated that when the notches are lined up together its time to change the belt

Originally Posted by Disco Sim

just checked out the rave cd and it stated that when the notches are lined up together its time to change the belt

Phew, that's good as the 300Tdi has a new belt and the notches are about 10mm apart.

Is it the same for the D1 V8? as those notches are about 10mm apart, but the other way? So getting further apart as belt streches.

yes its the same for the v8 and it also says that if your tension pulley bounces more than 5mm while in idle its time to change it too. That was my prob it yas jumping around more than 5mm and the belt ended up coming half off the pulley and started to shred it.