Ive had a ticking for sometime, but the valve seal clearance turned out to be fine. I suspected it couldve been the timing belt tensioner, but I haven't had the time to tear it down and look with summer classes ( i sure will now).

I'm wondering if you guys had any insight on the noise or what could be causing such a violent misfire overnight? yesterday it ran fine. today i started it up to this.

click picture to view the video:


I'm planning on first checking all the plugs/ wires for good connections (misfire)
verifying cam bolts are tightened/secure
verifying timing settings (misfire and noise hopefully)
checking oilpan for shavings or any bad news. (would suck)


then just tearing down and actually checking the timing belt tensioner et cetera.

any other suggestions or steps? or ideas?

 

Sounds like accessories belt or pulley. Remove the belt and see if the noise is gone

 

I was hoping so but I've removed the serpentine belt, still have the noise and slight misfire. It still runs/ starts up every click so it cant be as horrible as i thought. Oil looks clean so far, gonna check the pan once the sun goes down a little.

I really have a hunch that its related to timing but... how could it happen on its own overnight!

thanks for the input btw.

a second video of progress

 

found the issue. looking at the top of the timing belt it looked great, after a few rotations i noticed this:




put it back together and the ticking is gone, now just trying to troubleshoot a misfire in cylinder 5