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I just posted about my idler pulley chirping and I see yours in your engine pic... they look non stock. At least to me. I have same motor.


I think they are stock, but don't know for sure. They came with the truck, and usually only chirp when it's raining or there is a lot of moisture in the air for a few days.

1990 Montero LS LWB A/T
1989 Montero LWB 5 spd