Q45 V8-4.5L (VK45DE) (2002)
Coolant: Service and Repair
Draining Engine Coolant
WARNING: To avoid being scalded, never change the coolant when the engine is hot.
Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn to release built-up pressure.
Then turn the cap all the way.
DRAINING ENGINE COOLANT
1. Remove undercover with power tool.
2. Open radiator drain plug at the bottom of radiator, and remove radiator filler cap.
Be careful not to allow coolant to contact drive belts.
3. Remove air relief plug on heater hose.
4. Drain coolant from both sides of cylinder block when draining all the coolant in the system.
5. Check drained coolant for contaminants such as rust, corrosion or discoloration. If contaminated, flush engine cooling system.
6. Remove reservoir tank, drain coolant, then clean reservoir tank.