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John G.
John G., Honda Technician
Category: Honda
Satisfied Customers: 2652
Experience:  Dealership tech since 1982. ASE and Honda Master Technician.
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What is the proper way to change the coolant in 04 odyssey?

Customer Question

What is the proper way to change the coolant in 04 odyssey?
Submitted: 7 years ago.
Category: Honda
Expert:  John G. replied 7 years ago.

Hello, I can assist you with this. There is a drain plug at the bottom of the radiator.
Loosen it until the coolant starts to drain into a pan.
To drain the engine, there is a plug on the back of the block , above the axles inner joint.
Attach a hose to it and drain the remainder of the coolant.
Tighten the plugs.

  1. Pour Honda All Season Antifreeze/Coolant Type 2 (P/N OL999-9001) into the radiator up to the base of the filler neck.

    NOTE:

    • Always use Honda All Season Antifreeze/Coolant Type 2. Using a non-Honda coolant can result in corrosion, causing the cooling system to malfunction or fail.

    • Honda All Season Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Pre-mixing is not required.


    Engine Coolant Refill Capacity (including the reservoir capacity of 0.6 l (0.6 US qt))

    Without rear A/C:

    5.5 l (5.8 US qt)

    With rear A/C:

    7.5 l (7.9 US qt)

  2. Start the engine. Hold the engine speed at 1,500 rpm until it warms up (the radiator fan comes on at least twice). Make sure the thermostat is open.

  3. Turn off the engine. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2, if needed.

  4. Set the temperature control dial to minimum. Start the engine. Hold the engine speed at 1,500 rpm for 5 minutes, then turn off the engine.

  5. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2, if needed.

  6. Set the temperature control dial to maximum. Start the engine. Hold the engine speed at 1,500 rpm for 5 minutes, then turn off the engine.

  7. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2, if needed.

  8. Set the temperature control dial to minimum. Start the engine. Hold the engine speed at 1,500 rpm for 3 minutes, then turn off the engine.

  9. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2, if needed.

  10. Set the temperature control dial to maximum. Start the engine. Hold the engine speed at 1,500 rpm for 3 minutes, then turn off the engine.

  11. Check the level in the radiator, and add Honda All Season Antifreeze/Coolant Type 2, if needed.

  12. Repeat step 15 through 18 until the coolant level dose not change in the radiator, then install the radiator cap loosely.

  13. Set the temperature control dial to minimum. Start the engine. Hold the engine speed at 2,500 rpm for 1 minute.

    1. Set the temperature control dial on the front heating/cooling control panel to maximum, and select (Hot) mode on the rear control panel. Measure the temperature of the air from the rear floor vent for 2 or 3 minutes.

      Make sure the temperature is above the standard line of the graph shown below. If the temperature is below the standard line, repeat step 15 through 18 several more times. Then loosely install the radiator cap and recheck.

    2. Make sure you do not hear the sound of water flowing near the rear heater unit. If you hear water flowing, repeat step 15 through 18 several more times. Then loosely install the radiator cap and recheck.

    3. Fill the reserve tank with Honda All Season Antifreeze/coolant Type 2 up to the MAX mark on the tank, then add an extra 0.4 l (0.4 US qt) coolant.

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Edited by John G on 9/16/2009 at 4:59 PM EST
Customer: replied 7 years ago.
Will this flush the system of all the old antifreeze?
Expert:  John G. replied 7 years ago.
It will be nearly all replaced.
If you have contamination, you will need to have the system machine flushed. But for a regular maintenance service, the procedure is fine.
John G. and 8 other Honda Specialists are ready to help you
Customer: replied 7 years ago.

The pictures in the answer to my question don't show up on my computer. and at the end of the answer is alot of gibberish.

any thoughts as to why?

 

Steve