Working on my sister's car, finally buttoned it up after replacing the power steering rack and doing the timing belt. The tapping sound is making me insecure, but I haven't heard the car run in well over 6 months; am I just paranoid, or is that a valve tapping? I checked my timing marks (at camgear and at flywheel) at least a dozen times before I put it together, but I don't want to run it if I've mucked up the timing. It could be that it's just louder because it's a cold engine with the hood up and all the sound-deadening panels removed.

(Lids are off the PS and coolant reservoirs because they're still being bled and filled)

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