cold engine start clicking noise, what is it?

[paulmars]

I replaced my fuel filter on my 2003 2.4L tacoma 2wd. 65k miles. At the same time I checked the valves. No valve adjustment needed. Now I hear 4 to 6 rapid metallic clicks when i start the engine cold. Once it happened when it was warm. This fuel filter is not original equipment.

ideas?

tks,
pa

[paulfromoh]

Could be the lifters ticking till the oil gets back to the top of the engine

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