How to change the belt on a 2000 celica gts - 2000 Toyota Celica

Its not bad advice.
I doubt you would notice any difference between the two.
The numbers are what the thickness of the oil is at zero degrees and roughly 100 degrees.

The timing chain should not routinely need changing, but perhaps the tensioner does.
Try first to eliminate any other causes, like the bearings in the fan, drive belt idlers, or alternator. A useful tool is a long screwdriver which you can apply to the various areas while placing your ear to the top of it while the motor idles.
Be very careful to keep clear of moving parts like fan blades.

If well maintained and with regular service this engine can last up to 150,000 miles. Remember, this means changing all fluids regularly, changing the hoses and belts regularly and just keeping the engine in tip top condition. No racing, no over revving, etc.

you have blown your red line check gaskets from throttlebody gasket directly to the front of the intake. while running motor spray some brake cleaner around the areas one leak and you hear the automatic change in sound of motor. replace and torge to specs.

Never as it does not have a timing belt but instead has a timing chain that requires no maintenance and should last the life of the engine.

Mass air flow sensor. Its in the intake ducting, clean with CRCelectrical cleaner from parts store. Wash sensor with spray only, No rubbing brushing or compressed air. jut the spray.

nothing try back flushing heater core, they clog up due to litle water preasure,you might want to flush cooling system if you already havent, hope this hleps.

It sounds like you have a broken lift bolt, do you have a Toyota Celica GTS? If so look at this:

http://www.celicahobby.com/tech/tsb2/TSB_liftbolts.pdf

I hope this helps in some way

try replacing the relay for the daytime running lights

mass air flow meter