idler for AW11 supercharger belt

[pauln]

Hi all , have a bigger crank pulley on my MR2 and need a smaller idler , anybody know what I can use ?
Thanks Paul

[thegreatestben]

Timing belt pulley of some description

[Pelo]

Timing belt tensioner pulley is correct. I went through a lot of these in my old SC with a 14psi crank pulley. The idler needs to be smaller diameter than stock to fit properly. The trouble is that the bearings in the idler seemed to wear out quickly. Maybe the tension from the SC belt was much higher than a timing belt.

I'm hunting through a bunch of old documents on my pc for the part number, but I vaguely recall that I might have used a Ford/Mazda KL or KE timing belt tensioner idler from Repco. It matched the size needed and had a single bolt hole through the centre for mounting.
Take your current one into a parts shop, measure it with calipers, and match it to something available off the shelf.

[GDII]

Here is your answer. Although you probably already know from asking on the MR2 forum. But for everyone else.

http://mr2.org.nz/phpbb3/viewtopic.php? ... 50#p111955 Parts description
http://mr2.org.nz/phpbb3/viewtopic.php? ... 50#p112040 Parts photo (9 down)
Subaru EJ20 cam belt idler and 3mm spacer washer.

[85AW20v]

Here is your answer. Although you probably already know from asking on the MR2 forum. But for everyone else.

http://mr2.org.nz/phpbb3/viewtopic.php? ... 50#p111955 Parts description
http://mr2.org.nz/phpbb3/viewtopic.php? ... 50#p112040 Parts photo (9 down)
Subaru EJ20 cam belt idler and 3mm spacer washer.

I put that in his post on MR2.org.nz!!

[pauln]

Thanks guys used the Subaru one and seems good