Hello,
The camshaft does not have a pulley, there is a sprocket at the end of the camshaft to drive the timing belt.
I think the mechanic might be mentioning the crankshaft pulley also known as the harmonic balancer. Which is the large pulley that is located at the bottom of the serpentine belt routing (see picture of the pulley below). You might want confirm that with your mechanic.
https://www.2carpros.com/articles/how-a-harmonic-balancer-works
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Monday, January 24th, 2022 AT 1:03 PM