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Does the ticking sound like a sewing machine? If it does, unfortunately it's normal. Any of the aftermarket shaft-mounted rocker kit will be much quieter. If the ticking is coming from the bottom of the engine, then it's probably the o-ring on the oil pump, but that's a big problem that I've only heard about on older cars. I can't believe it'd be your injectors. I've never noticed the injectors over valvetrain noise, and to hear it, I've always had to use the screwdrivers against the ear technique.
Eugene
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