Kilst

Video: https://youtu.be/Ld7mUgfh8XQ

Getting a mic on it really brought the sound out. Sounds pretty bad to me now

The sound is most apparent when you can see me pressing on the throttle cable assembly, and at around 10 seconds. I have the mic facing injector 4 at those points.

Okay, update.

Timing is all good.

Compression test was ~180psi across all cylinders (cylinder #4 being at 190psi)

I ended up putting the stethoscope on the fuel rail around cylinder #4, and low and behold, that seems to be the source of the noise. Pulled the injector connection from cylinder #4 and bam! Sound gone completely.

I'm not really sure what to make of all that.

I'll get a video up soon of the noise though.

Timing belt was done at 170000kms. We're at 204000kms now, but I've looked at the belt, and it looks good.

Other belts were checked/tightened this morning. Ac needed adjusting.

Cheers

Edit: Actually, now that you've mentioned it, I should probably check the timing belt hasn't skipped before I pull the valve covers. I'm dreading sealing those suckers. I assume a timing belt slip could produce the symptoms?

Haha thanks for the welcome.

I can't hear it on start up unless blip the throttle hard, or it's under load (taking off/accelerating). Definitely a tapping sound, not a dull knocking. Sounds a lot like injector tick, only way louder.

Wasn't low on oil at the time of the pull, but that's good to know.

Yeah, I'm pretty sure they're rollers from what I've read.

Guess I'll be pulling the valve cover and doing adjustments in the next few days then. Thanks for the input!