2015 KIA Optima radiator cap

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Page 15 of 487

KIA Optima 2015 4.G Owners Manual Your vehicle at a glance
62
ENGINE COMPARTMENT
1. Engine coolant reservoir ...................7-31
2. Engine oil filler cap ...........................7-29
3. Brake fluid reservoir ...................

Page 105 of 487

KIA Optima 2015 4.G Owners Manual Features of your vehicle
32
4
Opening the fuel filler lid
The fuel filler lid must be opened
from inside the vehicle by pushing up
the fuel filler lid opener.
If the fuel filler lid does not open
beca

Page 349 of 487

KIA Optima 2015 4.G Owners Manual What to do in an emergency
86
IF THE ENGINE OVERHEATS
If your temperature gauge indicates
overheating, you will experience a
loss of power, or hear loud pinging or
knocking, the engine is probably too

Page 370 of 487

KIA Optima 2015 4.G Owners Manual 73
Maintenance
ENGINE COMPARTMENT 
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake fluid reservoir
4. Air cleaner
5. Fuse box
6. Positive battery terminal
7. Negative battery terminal
8.

Page 399 of 487

KIA Optima 2015 4.G Owners Manual Maintenance
32
7
Recommended engine coolant
 When adding coolant, use only
deionized water or soft water for
your vehicle and never mix hard
water in the coolant filled at the fac-
tory. An improper c

Page 400 of 487

KIA Optima 2015 4.G Owners Manual 733
Maintenance
Turn the engine off and wait until it
cools down. Use care when remov-
ing the radiator cap. Wrap a thick
towel around it, and turn it counter-
clockwise slowly to the first stop.
Step

Page 474 of 487

KIA Optima 2015 4.G Owners Manual 68
Specifications & Consumer information
RECOMMENDED LUBRICANTS AND CAPACITIES
To help achieve proper engine and powertrain performance and durability, use only lubricants of the proper quality.
The c