Kia Optima: Change to "winter weight" oil if necessary

Check battery and cables

Winter puts additional burdens on the battery system. Visually inspect the battery and cables as described in section 7. The level of charge in your battery can be checked by an authorized Kia ...

Check spark plugs and ignition system

Inspect your spark plugs as described in section 7 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way. ...

See also:

Alternator. Components and Components Location
Components 1. Pulley 2. Front bracket 3. Front bearing 4. Bearing cover 5. Bearing cover bolt 6. Rotor 7. Rear bearing 8. Rear bracket 9. Through bol ...

Reassembly
1. Reassemble the CVVT assembly (A) and camshaft (B). Tightening torque :53.9 ~ 63.7N.m (5.5 ~ 6.5kgf.m, 39.7 ~ 47.0lb-ft) ...

Special Tools
Use special tools when they are required. ...