If you have a compressor that is noisy then you may have some issues.

Here are some typical things that happen on startup of a compressor that may cause noise issues.

• Liquid Slugging- liquid refrigerant in the compressor
• Washing- liquid refrigerant foams the oil and then washed the bearings then lack of lubricant causes damage.
• Wrong Charge
• Service valves not open

If you are experiencing noise issues after install, then look for the following. 

• Liquid Slugging- verify metering device and superheat.
• Electrical issue
• Cold Starts- needs to have a crankcase heater. 
• Oil return issues- verify traps or potentially areas that need them

If the compressor is grinding then there may have been mechanical damage to it. Consider compressor replacement.