04 explorer knock/ticking

When engine is cold then started it ticks/knocks
for 30 sec to 2 mins the oil has been changed
every 5k miles with 5w30 sounds like it might be
coming from the front driver side valve cover but
can also hear it prominently if I put my head by the
wheel weld there's 142k miles on it and this
knock/ticking isn't normal I have a 05 mercury
mariner with 220k miles that's never made a noise
with this and it's been used abused and put away
wet anyway any suggestions to what this might be
and how do I reply to your answers can seem to
get that figured out either this coming up weekend
I'm going to try the transmission fluid in my oil then
change it and and add a quart of Lucas in with the
new oil to see if that fixes it