Hi everyone, i have a loud tapping sound whenever i start the car from cold, as the car warms up the sound does get lower but its always there, i can hear it always especially when im idle. Ive just changed the cam and lifters thinking it was that, but has made no difference. i put in a kent cam kit cvh35k. can it be coming from the bottom end or gearbox??

any advise will be much appreciated.

Thanks