Car started noise like nock ing that was from Clutch in AC copmressor

You can just disconnect the connector at the compressor and tie it out of the way. If your bearing on the clutch is going bad, then it will eventually seize up causing the belt to make big noise and break.

could be a bad clutch in the ac pump,try sprayin some wd-40 on the clutch with the ac turned on, this would only be a temp fix if the thump goes away, but will let u know if its the ac clutch

That would depend on the problem and prices in your area.
You can call around and ask for the cost to replace the ac clutch and the compressor.
If the bearing in the clutch is the noise, the clutch can be replaced without replacing the entire compressor assembly.

If you're getting ticking-type knock, I'd first look to the lifters. if it's a real hard knocking, it could be your main bearings on the lower end

na you dont have to change condenser if it was not leaking.was their gas in the system when you remove the ac copmressor.and for the oil,the ac man should pump the oil when he fills the gas in the system.

AC systems have a pressure switch that does not allow compressor to engage when freon is low.check for low freon.

It sounds like you may have some sludge in your oil. When the engine is cold the oil is thicker and takes a while for the oil pump to pump it through the engine. The next time you change the oil. Do an engine oil flush first to clean the inside of the engine and ports. If this does not work you might have to have the oil pump checked. There is no need to worry as long as you have oil pressure and the knocking stops. I hope this helps. Don't forget to rate this answer.

if you turned the motor backwards and then tried to start belt could have jumped this is a interferance motor which means the valves overlap the pistons ! you could have bent the valves.take it back to the person who did your timing belt

it could be the air conditioning clutch going out. to check turn your car on and idle it with ac on and hood open. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. Depending on the year of the vehicle it will disengage at full throttle and come back on when you are not at full throttle.
If it is a metallic sounding screech for example take a coke can and drag it across pavement kind of sound it could be a bad compressor or a bad ac clutch. If it is a more rubbery sound for example a car spinning its tires kind of noise it could be a loose belt.

1. Check to make sure all belts are tight under hood
2. start car and look at ac compressor to make sure compressor pulley is turning and that the fan clutch is engaged spinning

Check the resistor pack/board on the cabin fan