Topping up coolant
If there are signs of leakage from the cooling system - avoid starting the car and have it towed in order not to risk engine damage. Signs of leakage can be coolant under the car, that coolant evaporates or if more than 2 litres (approx. 2 quarts) is needed when topping up.
Warning
The coolant can be very hot when the engine has been running. Always allow the coolant to cool before unscrewing the filler cap.
When filling - carefully unscrew the cap to release any overpressure.
![P5-1617-S90/V90 Overview engine coolant](https://www.volvocars.com/images/support/imgad1b079d461b6156c0a8015217b76ab1_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-1617-S90/V90 Engine coolant refill 1](https://www.volvocars.com/images/support/img04e6fc7e46124157c0a801524cb1d0f6_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-1617-S90/V90 Engine coolant refill 2](https://www.volvocars.com/images/support/img4b3f4ba8462483f3c0a8015242805b31_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-Icon gray box 1](https://www.volvocars.com/images/support/imgc457d9ab665e93b5c0a801524f9fdc84_1_--_--_VOICEpnghigh.png?imwidth=1280)
Screw off the cap in the plastic cover.
![P5-Icon gray box 2](https://www.volvocars.com/images/support/img788513ba665e4b01c0a801521b297a3f_1_--_--_VOICEpnghigh.png?imwidth=1280)
Screw off the cap and top up with coolant if necessary. The coolant level must not exceed the yellow MAX mark inside the expansion tank.
Reinstall the parts in reverse order.
![P5-S90/V90-1617-Overview engine coolant, right hand drive](https://www.volvocars.com/images/support/img2e40f5d37d2bfb03c0a8015243a146ff_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-S90/V90-1617-Engine coolant refill 1, right hand drive](https://www.volvocars.com/images/support/img88aeda837d3e4aaec0a80152489a2fc3_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-S90/V90-1617-Engine coolant refill 2, right hand drive](https://www.volvocars.com/images/support/imgff8cbe7d7d509301c0a8015252f2af4b_1_--_--_VOICEpnghigh.png?imwidth=1280)
![P5-Icon gray box 1](https://www.volvocars.com/images/support/imgc457d9ab665e93b5c0a801524f9fdc84_1_--_--_VOICEpnghigh.png?imwidth=1280)
Grip the hatch's handle and lift/jiggle the hatch from the plastic cover.
![P5-Icon gray box 2](https://www.volvocars.com/images/support/img788513ba665e4b01c0a801521b297a3f_1_--_--_VOICEpnghigh.png?imwidth=1280)
Screw off the cap and top up with coolant if necessary. The coolant level must not exceed the yellow MAX mark inside the expansion tank.
Reinstall the parts in reverse order.
Important
- Coolant is harmful to ingest and may cause organ damage.
- Only use coolant of Volvo-approved quality. If concentrated liquid is used, make sure that the ratio is 50 % coolant to 50 % water of approved quality.
- Hard water, and water with a high content of chlorine, chlorides and other salts or contaminants may cause corrosion to the cooling system.
- Do not mix different coolants.
- New coolant must be used to replace all coolant when replacing a large component in the cooling system.
- Only operate the engine when the cooling system is filled to the correct level. When the coolant level is too low, it may lead to overheating, resulting in engine damage.