hi all,
so some time ago i heard a chirping noise turned out to be the alternator pulley so i replaced it and while had it off i thought why not put a new drive belt on it.
tensioner assembly is new and genuine also.
i used a new dayco 7pk1640
previously had a genuine nissan one on there still great but thought ill rotate it to a spare.
after some time im getting belt noise sound like a slip or squeak
so i pulled the belt off and went back to the old genuine on and all good now.

the genuine is a 7pk1646, i see all after market belts listed for zd30 crds are either 7pk1640 or shorter like 1637 or 1635

why does the longer genuine belt go fine but the shorter aftermarket belts sound to be making a slipping squeak?
doesn't make sense.. i was close to removing the dayco 7pk1640 to fit a 1635. but the longer genuine belt is noise free.

ive read everywhere that these engine love genuine belts and i will keep using genuine now, and keep the dayco as a spare cause it will work in a pinch.

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