SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 493 (COOLING SYSTEM)ENGINE COOLANT REPLACEMENT
2008 Mazda 6 s Sport, 4D Hatchback, Standard

Engine Coolant Replacement

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Engine Coolant Replacement
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the coolant in the coolant reserve tank.
  2. Remove the radiator cap and the radiator drain plug. (See COOLING SYSTEM SERVICE WARNINGS .)
    Fig 1: Removing Radiator Cap And Radiator Drain Plug
    G03637759Courtesy of MAZDA MOTORS CORP.
  3. Drain the coolant into a container.
  4. Flush the cooling system with water until all traces of color are gone.
  5. Let the system drain completely.
  6. Tighten the radiator drain plug.

    Tightening torque 

    0.7-1.1 N.m {7-12 kgf.cm, 7-10 in.lbf} 

    CAUTION:
    • The engine has aluminum parts that can be damaged by alcohol or methanol antifreeze. Do not use alcohol or methanol in the cooling system. Use only ethylene-glycol-based coolant.
    • Use only soft (demineralized) water in the coolant mixture. Water that contains minerals will cut down the coolant effectiveness.
    • Engine coolant will damage paint. If engine coolant does get on a painted surface, rinse it off quickly.
  7. Referring to the following chart, select proper gravity of the coolant.
    ANTIFREEZE SOLUTION MIXTURE PERCENTAGE

    Coolant protection Volume percentage Gravity at 20 °C {68 °F}
    Water Coolant
    Above -16 °C {3 °F} 65 35 1.057
    Above -26 °C {-15 °F} 55 45 1.072
    Above -40 °C {-40 °F} 45 55 1.086
  8. Slowly pour the coolant into the radiator up to the coolant filler port.

    Filling pace 

    1. 1.0 L {1.1 US qt, 0.9 lmp qt}/min [max] 
  9. Fill the coolant into the coolant reserve tank up to the FULL mark on the coolant reservoir.
  10. Fully install the radiator cap.
  11. Start the engine and warm it up.
    CAUTION:
    • If the coolant temperature becomes too high, stop the engine to prevent it from overheating.
  12. After engine warms up, perform the following steps.
    1. Run the engine at 2,500 RPM  for 5 min. 
    2. Run the engine at 3,000 RPM  for 5 min. 
    3. Repeat steps (1) and (2) several times.
  13. Stop the engine and wait until it is cool.
  14. Inspect the coolant level.
    • If it is low, repeat Steps 7-12.
  15. Verify there is no coolant leakage.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.