I recently noticed a ticking noise coming from the B20Z in my crv. I heard the noise after getting an oil change done at Great Canadian Oil Change. The noise seems to appear after the engine is warmed up to optimal running temp. The odd thing about the noise is it doesnt seem to appear every time. I took a video of a cold start up, then waited for the engine to warm up, but the noise never appeared that time so I did not create another video of it running at optimal temp. I guess my main question is if anyone has ever encountered something like this and if I should be worried about it. This is a stock, unmodified crv with 60,000 km on the clock. I haven't checked the valve clearances yet, and am planning on doing that in the near future. Is there anything else I should do to prevent any potential future problems?