How do you replace Volvo 850 camshaft seals?

To replace the camshaft seals on a Volvo 850, first, ensure the engine is cool and disconnect the battery. Remove the timing belt cover and the timing belt to access the camshaft. Carefully pry out the old seals using a seal puller or a flat tool, then clean the sealing surfaces. Install the new seals by lightly greasing them and pressing them into place, reassemble the timing belt, cover, and reconnect the battery.