new o-rings coated with A/C PAG oil
when replacing a frost plug u can use a sealant but only use silicone u dont realy need it and yes u have to clean the area good
You need the sealant on the ends where the supplied gaskets don't cover fully.
Thermostats in most vehicles have seals and gaskets that are designed so you do not need any aditional sealant.
yes because it make the ac longlife
YES! I just spent over $1500 replacing the alternator, condenser, condenser fan and alternator fan due to corrosion because the panel was missing.
You do not need to add a sealant to the gasket. Just make sure you torque the bolts to factory specs.
No you do not.
No, just replace the radiator. The other one (in the front) is the condenser for the a/c system.
Yes, however you will need to provide more details as to what you are doing with the condenser.
no u dont need to use sealant u should get a gasket
The Chevrolet water pump bolts do need a sealant. Thread tape can be used on the bolts in the place of a sealant.
No I think you will need an 18000 condenser for an 18000 BTU.