Viper GTS V10-8.0L VIN E (1999)
Refrigerant Oil: Service and Repair
Refrigerant Oil Capacities Chart
Refrigerant Oil Level Check
When an air conditioning system is first assembled, all components (except the compressor) are refrigerant oil free. After the system has been charged
with R-134a refrigerant and operated, the oil in the compressor is dispersed through the lines and components. The evaporator, condenser, and filter-
drier will retain a significant amount of oil, refer to the Refrigerant Oil Capacities Chart. When a component is replaced, the specified amount of
refrigerant oil must be added. When the compressor is replaced, the amount of oil that is retained in the rest of the system must be drained from the
replacement compressor. When a line or component has ruptured and oil has escaped, the compressor should be removed and drained. The filter-drier
must be replaced along with the ruptured part. The oil capacity of the system, minus the amount of oil still in the remaining components, can be
measured and poured into the suction port of the compressor.
CAUTION: The refrigerant oil used in a R-134a A/C system is unique. Use only oils which were designed to work with R-134a refrigerant.
The type of oil that must be used in the Viper A/C system is ND8 PAG refrigerant oil. This oil is a polyalkelene glycol base oil. Use of oil other than
the approved oil is not recommended.
The amount of oil the Viper A/C system holds is 140 ml of ND8PAG refrigerant oil.
Verify Refrigerant Lubricant Level
1. Discharge refrigerant system using recovery/recycling equipment if charge is present.
2. Disconnect refrigerant lines from A/C compressor. Cap the open lines to prevent moisture from entering system.
3. Remove compressor from vehicle.
4. From suction port on top of compressor, drain lubricant from compressor.
5. Add system capacity minus the capacity of components that have not been replaced. Refer to the Lubricant Capacity Chart. Add lubricant through
the suction port on compressor. This is not to exceed 133 ml (4.5 oz.) in total.
6. Install compressor and connect refrigerant lines. Then evacuate and charge refrigerant system.
7. Most recovery/recycling equipment will measure the lubricant being removed. This is the amount of lubricant to be added back to the system. If a
new compressor is being installed, drain lubricant from old compressor, measure the amount drained and discard old lubricant. Drain the lubricant
from the new compressor into a clean container. Return the amount of lubricant measured from the old compressor, plus the amount reclaimed
from the system back into the new compressor.
