Thanks. Now I am more confused. I only meant to buy the pulleys for the tensions - main and accessory. Have I purchased the wrong one for one of them?

Happy Thanksgiving BTW - up here in Canada we had ours last month...

 

Well you should replace all three anyway. The idler certainly goes bad and it’s easy to replace. I don’t have all the specs on hand right now and I am in bed. But I think I had a post on this topic before. I may have listed the parts, etc.

 

Thanks.

You know you're supposed to quiet the mind before bed...Not sure this helps

 

My tensioner from rock auto shows spec as 25mm width

The spec on the tensioner unit (full unit) show the pulley with a spec of 30.5

Should I worry? 5mm isn't insignificant...

 

Actually 5mm is significant. Again there are two tensioners, they are not the same or interchangeable. Also both belts are not the same width. I *think* that tensioner would be for the main drive belt, the forward belt. You would have to cross reference the part numbers.

 

Yes - I know. Sorry I used a double negative . It IS significant (conversely it isn't insignificant).

The smaller width one could be for the accessory (ie. the one closest to the engine) as that belt is narrower.

The idler pulley I have is also narrow too I believe. the Main belt - is thicker (the one that loops the fan clutch and crank).

 

And I read too fast. Oops.

 

I can't seem to find the part numbers for this - either on Rock Auto or other. The LR part for the arm AND pulley is readily available. I now see that the main belt tensioner seems to run 37mm - which none of the rock auto pulleys seem to work out...

will keep searching....

 

Diagrams and part numbers:

 

Diagram and part numbers: