Whining noise after engine rebuild

Schwamm

Member
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2003 Mazdaspeed Protege, 2008 Mazda 3 Hatchback, 1984 RX7 GSL-SE
I posted this in the Mazdaspeed forum already but there doesn't seem to be much activity there.

I rebuilt my engine recently and now have a whining noise coming from the belts that I can't figure out. I've already done a lot of troubleshooting and it has stumped me for about a month now.

I've tried:
1. Running the car without accessory belts (a/c, water pump, etc.)
2. Swapping out the tensioner and idler for an old set
3. Buying a new tensioner
4. Replacing the timing belt
5. Re-installing the cams to make sure everything is lubricated and torqued correctly

The noise has changed a little based on which tensioner is used but it almost seems random. At one point, I thought I eliminated the noise with my old tensioner but when I tried it again later I could still hear it. The only other thing I can think of is that my new oil pump is noisy, or at least noisy while running 30w non-detergent oil. Anyone have any ideas, or opinions on what type of sound this is?


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