2001 Ford Focus just started making noises like a tapping noise or nuts and bolts loose under the hood..Starts fine no smoke, no engine light on anyone help

clean the negative terminal the do it up tight
the clicking noise will be that the starter solenoid is not getting a good current flow because of the loose terminal

this does sound like theres a loose line tapping the engine/frame,during warm up the engine idles faster which could make it vibrate faster causing the the clanking or tapping noise,if this has started after trans fluid change,then check the lines running from the trani to radiator sometimes the service person might bang into something causing plastic clips that hold the lines to break,try getting under it and have someone start the truck and listen to see where it's coming from also hold the lines & see if the noise stops,the service guy could have unbolted something & never put the bolt back causing the clank ex.line may have a clip holding it thats bolted to the trani pan ?good luck

No way to guess at a noise

Need the car to listen & then
there is a slim chance that you would
resolve,even if you knew what it is &
it isn't under warrantee, so you will have
to live with it

you may have a vacuum leak or a restriction in the exhaust system check around under the hood to see if you can narrow down the noise. a restriction in the exhaust causes the excess exhaust to push back threw and make a whooshing noise. hope this helps

that noise is a bad bearing, It soon will come loose and destroy the engine

Maybe a stray leaf, twig or other small object has been sucked into the ventilation duct, touching the centrifugal fan.
You need to pull off ducts around fan and inspect.

Does it make this noise when you turn corners.

starter motor! good place to start be creative tap it with hamer should start then replace starter!?

it very well can be that depending on the severity of the ticking noise, if it sounds like its coming from the top of the engine, place your hand on it only when you first start it up and if you can feel it knocking slightly and if the noise dies away once warmed up id say its your lifter, if its a heavier knocking rather than a ticking and comes from below or bottom end of engine it may be big end bearing, not good. try putting some engine treatment through the engine oil and make sure you run it in as directions state then change the oil and filter and see if that helps :)

Try replacing the points and plugs and an oil change, rule this out first.