Noise sounds like timing chain problem, what else ...

I suggest you ask an experienced person listen to the noise.

Hydraulic tappets can click for a while after starting and usually aren't anything to worry about unless the noise becomes louder, harsher and more pronounced as the engine speed increases.

If the clicking is suspected to be timing chain related it would be very unwise to ignore it.

Have they check the power steering pump?

Could be the noise for the chain would be around the belts. It would be a rattle type noise. How many miles on vehicle

How many miles on it? I have similar engine, and when oil is low, the timing chain tension system doesn't. At 120000 miles, I need to replace sparkplugs. I understand you can get the same sound when it needs new plugs... It's a pain to do.

could be time for a new timing set. depends how many miles are on the engine and if something has gone wrong. they don't last forever and the belts need to be change every 75k to 100k to save doing damage to the valves and piston if it were to break. the chains will last a lot longer but still wear out

old post.zero help, so here i am, filling the hole for next person.

the V6 has no cam belt. it's a chain drive.
how many miles on v6 motor.?
the chain runs 2 times longer than a belt. easy. or more.
the hydraulic adjusters may not, when not doing oil changes on time.
the start up noise is normal (not mine) but the factory TSB covers this, on higher mileage v6,
the engine starts and the chain , or lifters can make noise
until oil pressure reaches normal. (0w oil can be and issue here)
i run 10w40 all year, and mine runs like new, all the time. 100k miles on my block.
if the noise stops , after few seconds the TSB is clear on that.
its normal.
if it makes noise full time, really any engine. its time to stop
not run it and fix it or the damage can cascade it to total engine destruction.
have an ASE mech, diagnose the noise and true source
we have tools to do that , and you dont.
we find the true source and evaluate that.
next time post how long the noise happens, hot and cold
and hot only start ups.?
most shop manuals have a chapter on noise.

here is typical translation of that.
http://www.fixkick.com/NOISE.html

these vehicles are notorious for timing chain noises.most likely primary chain guide broke causing improper chain tension and noise described.about a1500.00 repair:(

Dear Rubbing Noise,
The correct and long term repair for this would be to replace the chain and timing chain tensioners.Only saying to replace the chain seeing as how it's been slapping on metal, where it's not supposed to.This will cure your problem and you will be a happy camper, HOPE I COULD HELP!!!

timeing has slipped or cam broken

I is the timing chain inside the engine rubbing on the cover houseing. You need to have the chain or tensioner replaced or both
Mike