W209 CLK320 Cabriolet V Belt Idler Pulley Replacement

[Pegbasher]

Morning forum..

The V-belt idler pulley on my CLK320 requires replacing as it has begun to split.

I am hands-on with the tools and reasonably able, can this be done without removing the belt? I wondered could I can keep the belt tensioned/supported/ in position to remove the old and replace new pulley??

Apologies if this is a stupid question and ridiculous thought

Thanks in advance..

 

[Blobcat]

Below is a thread from when I replaced mine

M272 Serpentine Belt Idler and Tensioner failure and replacement

Sat waiting for garage door to open tonight and thought “that’s a strange noise the door is making”. Then realised I could smell plastic burning... :( Engine off, bonnet open, front engine cover off and bits of belt strewn around :( Top idler wheel completely gone... You can see bits of...

forums.mercedesclub.org.uk

 

[Pegbasher]

Below is a thread from when I replaced mine

M272 Serpentine Belt Idler and Tensioner failure and replacement

Sat waiting for garage door to open tonight and thought “that’s a strange noise the door is making”. Then realised I could smell plastic burning... :( Engine off, bonnet open, front engine cover off and bits of belt strewn around :( Top idler wheel completely gone... You can see bits of...

forums.mercedesclub.org.uk

Thanks for the thread, very helpful info.

Will get parts ordered asap

 

[mioba]

Replace the belt at the same time. Clean all grooves, check all other pulleys.
Its an easy job on most cars. Just be careful with the grenade pin.

 

[rifiki]

As above. If the idler pulley is original change it. You be surprised how small the bearing is.
It let go on my CLK M272 motor without warning, motor, at around 80K miles
The shredded belt wrapped it's self round the crankshaft between block and crankshaft pulley
causing problems.

 

[Pegbasher]

Thanks for the advice

Parts arrived, removed old pulley which had split in half

new idler pulley fitted along with belt

job done

Thanks all