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Solving Honda Idle Issues (hunting idle)

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  • #615714
    ArielAriel
    Participant

      One question do, when I’m doing the process of letting the car idle, there come a point when the coolant stars to rise the level on my Funnel at a point where spills everywhere with a lot of pressure.

      I assume is the water pump but why so much pressure. As I’m writing I think I Forgot to let the idle go back down.

      I’ll make a video this weekend to show you guy. So you can hear and see the Engine and give me your opinions.

    Viewing 9 replies - 1 through 9 (of 9 total)
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    • #615814
      Matt BrandsemaMatt Brandsema
      Participant

        I am not quite sure what you mean. What is “the process of letting the car idle?” You say you have a funnel, are you filling the car with coolant? Are you bleeding the system? The coolant will eventually rise and bubble over as you leave the cooling system open, that is normal.

        #615818
        TomTom
        Participant

          That sounds like it might be boiling over. Are the cooling fans cycling? Are you getting a lot of bubbles in the coolant?

          #615827
          Lorrin BarthLorrin Barth
          Participant

            If you are talking about when you refill the cooling system this is what you should see happen:

            Fill the radiator to the bottom of the filler neck. Start the engine. Nothing much happens to the coolant in the radiator.

            As the engine idles, the coolant will slowly start to climb up the filer neck eventually to the point of overflowing. Both air and coolant are in the engine and they both expand with heat. BTW, if you don’t like the mess created you need the Lisle 24610 Spill-Free Funnel. I don’t have one so I put my hand over the radiator opening forcing the coolant to the reservoir. This maybe is a good way to get burnt should you have a blown head gasket.

            Suddenly the coolant in the radiator will seem to disappear. The thermostat has opened and the air has come out. Fill with additional coolant until up to the bottom of the filler neck and cap. If you continue to watch the activity in the radiator you will see coolant flowing. This will start and stop as the thermostat opens and closes.

            #615975
            EricTheCarGuy 1EricTheCarGuy
            Keymaster

              Sometimes when bleeding a cooling system this will happen. When it does, shut the engine off and let it sit for a few min. During that time you may notice that the coolant suddenly disappears. This is due to the thermostat opening. Once this happens, top off the coolant and resume bleeding the system until the cooling fans come on.

              Good luck and keep us posted.

              #619091
              ArielAriel
              Participant

                Thank you for the answers guys.

                In order to respond to every one, the process I’m doing is the Following:

                1. With engine cold or slightly warm (get home and 3 hours later), get the radiator cap of.
                2. Plug the Funnel
                3. Fill a little of coolant
                4. Start the engine
                5. Increase the idle a little till 2000 RPM
                6. At that point I start to see bubbles, just a few but no fans ON
                7. From there, after a few minutes the level on the funnel starts to rise to a point where everything gets out of control and spills (VERY HOT actually)
                8. I turn the engine off and the coolant keeps coming out of the radiator.
                9. After that I got almost no coolant on the system and have to refill all of it.
                I have tried 2 times and play again Eric’s Video. By now I want to know what am I missing or doing wrong.

                #627136
                ArielAriel
                Participant

                  Thank you Eric, the thing is that when I turn Off the engine, the coolant comes out even with more pressure. Then I have to refill.

                  I just Refill and stop the process in order to identify what am I doing wrong, also the good quality coolant is very expensive here. You have to pay almost a RD $ 1000.00 for a good quality Gallon, which is around USD $ 25

                  Do you think the Thermostat might be damaged?

                  #627369
                  EricTheCarGuy 1EricTheCarGuy
                  Keymaster

                    You didn’t mention putting the heat on hot with the fan off. This is a critical step in bleeding the system as any trapped air in the heater core can cause that issue.

                    Also, you didn’t really list what the actual issue was. Is the vehicle overheating?

                    Keep in mind that some aftermarket parts such as radiators and thermostats have been known to cause issues with bleeding the air out of the cooling system.

                    That said, you may want to read through this article on diagnosing an overheat to rule out other issues that may be at play.

                    http://www.ericthecarguy.com/faq/what-to-do-when-your-engine-overheats

                    #632669
                    ArielAriel
                    Participant

                      Hello Guys.

                      In the end, yesterday I tried to do a Valve adjustment on my 2003 CRV. I follow the Process detailed on the service Manual. After I finished, the engine was so smooth that I didn’t even notice if it was on. The vibrations drop down to almost 0. The fluctuation on the idle disappeared.

                      The only thing that bothers me is that after the valve adjustment my engine sounds like a diesel engine. I use the correct gauge: 0.23 mm (0.009 inch) for intake valves and 0.30 mm (0.012 inch) for exhaust valves.

                      The engine was stone cold, it was off since the night before. The only thing that kept my attention was that the exhaust valves where with more free play than the intake, but I assumed it was normal because of the difference in the gap space.

                      The engine is so smooth that I can barely recognize my CRV. The only thing that bothers me is the Valve sound.

                      Do you have any idea what I might be missing.

                      #632845
                      EricTheCarGuy 1EricTheCarGuy
                      Keymaster

                        Since this thread is for an overheat issue I would ask that you start a new thread for the valve adjustment problem.

                        That said, valve adjustments take some time to master. If you get it wrong, you can damage the engine. Since you now have noise, you might want to go back and recheck your adjustments.

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