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Coolant replacement 99 Civic EX On the Civic is there any trick to keep in mind when changing the fluid? Some cars Ive done are simple, top off the radiator, turn heater to full hot, start engine, rev until up to temperature, stop and refill, repeat until radiator filled. Will this work on the Civic or are they prone to getting air pockets? |
Re: Coolant replacement 99 Civic EX That setup is prone to trapping air in the heater hose that comes off the cylinder head Raise the nose of the car as high as safely possible, park facing uphill, etc...anything to get the radiator as high as possible. I set heater temperature to full hot so liquid can flow, but leave the fan turned off. Run it through warmup and stat opening and radiator fan runs, rev the engine, all that usual stuff like you said. I use a spill free radiator funnel for this work, it's the greatest thing since sliced bread. https://cimg0.ibsrv.net/gimg/www.civ...71f7babf45.png |
Re: Coolant replacement 99 Civic EX
Originally Posted by ezone
(Post 4734904)
That setup is prone to trapping air in the heater hose that comes off the cylinder head Raise the nose of the car as high as safely possible, park facing uphill, etc...anything to get the radiator as high as possible. I set heater temperature to full hot so liquid can flow, but leave the fan turned off. Run it through warmup and stat opening and radiator fan runs, rev the engine, all that usual stuff like you said. I use a spill free radiator funnel for this work, it's the greatest thing since sliced bread. https://cimg0.ibsrv.net/gimg/www.civ...71f7babf45.png The Civic is my sons. |
Re: Coolant replacement 99 Civic EX I watched a Youtube video of the funnel, I see where that can save time. Being able to allow the system to bubble through the large funnel. |
Re: Coolant replacement 99 Civic EX
Originally Posted by pinehilljoe
(Post 4734911)
Does leaving the upper radiator hose off the thermostat house help? The main place I ran into an airlock is that heater hose I mentioned......My check is to run max heat/full blast fan at idle periodically.....If it's got great heat after the fan has been on full blast for one minute, the heater circuit is probably bled out. If it has weak or very little heat at idle after one minute but heat gets better when you rev it up, it's still not bled good enough. The rest of the system bleeds out pretty easy with the funnel attachment. |
Re: Coolant replacement 99 Civic EX
Originally Posted by ezone
(Post 4735073)
IMO no. The main place I ran into an airlock is that heater hose I mentioned......My check is to run max heat/full blast fan at idle periodically.....If it's got great heat after the fan has been on full blast for one minute, the heater circuit is probably bled out. If it has weak or very little heat at idle after one minute but heat gets better when you rev it up, it's still not bled good enough. The rest of the system bleeds out pretty easy with the funnel attachment. |
Re: Coolant replacement 99 Civic EX Does continuing to idle/rev with the funnel reservoir help clear a heater air block? |
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