serpentine belt pulleys

[crdv6]

Hi all,
I need to replace my belt idler pulleys. There are 2 idler pulleys and one pulley on the tensioner. Is the tensioner pulley replaceable without replacing the whole assembly?
I have found (Supercheap Auto would you believe) sell the pulleys as follows:

OD 54mm W30mm x2 required @ $42.86 and OD65mm W29 $54.54 and the tensioner with pulley included is $245.87
Is the pulley on the tensioner and the OD65W29 one and the same thing?
Precision International also list this one for $53.76 and I am guessing it is the one attached to the tensioner, but I may be wrong.
I am going to buy the parts and get my mechanic to fit them, but I'm not sure if I get the 3 pulleys I've got the tensioner one included or not, or if I buy the tensioner complete with pulley, then do I only need the other two?
Can anyone confirm what is needed?

[bodgie]

What brand of pulley are they? If they are Dayco I'd steer clear of them, Nuline seem to be way more durable IMHO.

Depending on the K's on the car I'd be inclined to replace the tensioner and belt and you'll be good to go.

I'm not sure on the part numbers, here is the Nuline catalog which should be helpful:

http://www.precisionparts.com.au/Raw...13%20Small.pdf

Here is another option for some comparative pricing fro you:

http://www.westernfilters.net.au/belts-pulley-kits/

[fester]

x2 on the Nuline. I replaced all mine on the 2.7 and all the Nuline ones are steel. I got them through Repco under their part numbers and they are just the Nuline ones rebadged. Many of the Daycos can be plastic. I also noticed with the 2.7 that all the Nuline pulleys allow for the bearing to be replaceable unlike the original plastics which have the bearing moulded in. /hence if a bearing seizes the whole pulley tends to get shredded or melted. For what it's worth again on the 2.7 I could replace just the pulley on the tensioner with the Nuline one, from memory just needed a slight swap with the bearings but if you can get a whole assembly at a price suitable to you it's probably a good thing.

[crdv6]

Thanks for the reference to Nuline catalogue. It is is almost exactly the same as the Repco catalogue, but Repco put their own part numbesr on them.
The Supercheap Auto catalogue lists the Nuline pulleys, same specs but different numbers again of course. They also list a Dayco tensioner with the pulley wheel attached; should I just get the Nuline pulleys and steer clear of the Dayco tensioner then?

[crdv6]

Here is an update- I just discovered that Nuline pulleys, manufactured by Precision Parts, have been acquired by Dayco. So I don't see how there would be any difference.
The pulleys in question are $260 from Repco, $223 from Bursons and $140 from Supercheap (plus $25 postage) All 'Nuline', but the display picture on Supercheap Auto's catalogue says 'by Dayco'
I'm still sure they are the same parts, unless proven to the contrary.

[drover]

The main thing is plastic versus metal pulley, as said before if the bearing goes pear shape the plastic pulley melts the metal job doesn't but makes a hell of a noise. The takeover happened last year I believe.
If your going to do it yourself and your 3lt has the same bolts as the 2.7lt (both MB engines) then make sure your have the correct bit to fit the bolt head as they can be a bastard to remove, they are a torx head I think .

[bodgie]

Hopefully Dayco keep the Nuline quality as their products seem to be very ordinary by comparison.

Jason