4 DR TOYOTA COROLLA

connect oil pressure gauge in the place of the cylinder head oil pressure switch monitor reading from start up and while idling. Check timing belt ensure its spot on valve and piston contact will create noise

Does it sound like a valve or piston, or something loose on the exhaust pipe ?

weak engine!!!! and noise... both real...!!!!
can it be made to make noise , PARKED (easy if true)
find a real mechanic that can diagnose noise, many can't.
find one that knows all the tests and has a stethoscope .
there are lots of tests to do. not just guessing.
that lost power is diagnosable too. tell him that.
or find a new mech.
find a real ASE mach. with patch on sleeve.

1. the drop belts cold test.
2. pry all objects connected to engine, brackets, and pry the exhaust header pipe. noise stop?

keep in mind the engine shakes normally and can make things
connected rattle and make noise, we look at that first.
then work to harder problems.
i have an electronic stethoscope that i can hear deep problems
in the engine..
are you going to replace the $2500 transmission , on a guess?
so pick that last ,right?
The power loss , can be EFI issues
did you SCAN this PCM? and get any DTC errors?????????
scan it.
if an intake valve sticks it will misfire bad (pretend #2 cyl)
the ECU then throws P0302, misfire #2 , and the HLA makes
a huge racket any pro can hear with stethoscope. at valve cover.

see some here.
http://www.fixkick.com/NOISE.html

id not drive it until its fixed,

does it get worse the faster you go? could be your lifters or valves ticking.

run the fault codes
no fault codes , check for loose mud flaps , trim , wheel trim etc

Hi
Loud noise from Exhaust means your exhaust system is leaking.
this will make the performance poor on your vehicle.

Get that check and replaced.

here are few components that can cause such problem.Its advisable to click the link below and follow the troubleshooting to correct the problem.
Engine makes noise? http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html

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Chirping sound coming from engine? http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
--------- Vehicle making Clunk Thump Thud noise? http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html

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Car Engine Overhaul Tips? http://vwrepairhelp.blogspot.com/2011/11/car-engine-overhaul-tips.html

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HOW TO PERFORM A BASIC ENGINE TUNE UP-OIL CHANGE
http://schematicsdiagram.blogspot.com/2011/08/how-to-perform-basic-engine-tune-up-oil.html

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Rattle noise from engine? http://whatisbyme.blogspot.in/2012/05/2005-toyota-corolla-rattle-noise-from.html

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These will help.
Thanks.

make sure if noise come from vvt actuator, check the oil quality

This is normal for a 210K Toyota Corolla. What you are hearing is the sound made by the power steering pump. Check fluid level and fill as needed. Some noise in the instances you are mentioning is normal.

Thats good that you are getting a second opinion. A Toyota dealer will be able to check it and see what the noise may be. See what they come up with. I dont think a worn timing chain or guides would cause a low oil pressure problem. But, if it does indeed have low oil pressure, that is a serious problem.