Weird knocking sound from cam gear?
#1
Weird knocking sound from cam gear?
So recently my 2000 nb miata started making this ticking/knocking noise from what seems to be the cam gear. The car ran just fine before but it appeared after a drive yesterday.
I first thought the sound was coming from the alternator being loose but that doesn't seem like it.
It doesn't sound like valve lash and I also changed the shims to fix lash already a while ago.
I removed the oil cap, and the cams seem to be getting plenty of oil.
when I rev the engine the knocking sound seems to quite down or even go away but that could also be because other sounds deafen the knocking.
the knocking does speed up when I rev the engine till about 2-2.5k where the sound quites down.
Video of knocking:
https://youtu.be/QO_MuLA9PRs
Could anybody take a guess what this could be? Or any tips?
Thank you in advance!
I first thought the sound was coming from the alternator being loose but that doesn't seem like it.
It doesn't sound like valve lash and I also changed the shims to fix lash already a while ago.
I removed the oil cap, and the cams seem to be getting plenty of oil.
when I rev the engine the knocking sound seems to quite down or even go away but that could also be because other sounds deafen the knocking.
the knocking does speed up when I rev the engine till about 2-2.5k where the sound quites down.
Video of knocking:
https://youtu.be/QO_MuLA9PRs
Could anybody take a guess what this could be? Or any tips?
Thank you in advance!
#7
UPDATE: I found the problem, somehow I didn't torque the crank bolt well enough so the crank bolt came loose. because of that my harmonic damper was loose and it started shaking, which, I think, caused my timing belt to wobble a bit and hit the valve cover. making the knocking sound. luckily it was and easy fix and nothing broke.
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