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Thread: Civic 7th Gen heatup issue on high speed

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    Default Civic 7th Gen heatup issue on high speed

    Hi,

    So last week I went to Islamabad on my 7th gen Civic. Even though the trip was safe and sound, there was something that constantly bothered me throughout the motorway trip both times, going to isb and coming back.

    The car started to heatup as soon as I constantly drove at 130 for about 10 minutes or hit 140-150 for a few minutes while overtaking. Then I had to lower my speed to 110-120 to keep the needle below 50% mark. I even made a short stop at Bhera just to check the water level in radiator and it was okay.

    Can someone tell me why is this?

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    Main reason are jammed tappet Check oil viscosity n radiator fan direct or auto?

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    With that many miles on it, plan on replacing the water pump and T-stat. Also check the condition of all hoses including those little (1/2", 5/8" or 3/4") heater hoses. If they're originals, replace them all with new. Before you dismantle anything, drain about 1-1/2 quarts of coolant. Don't do this with a hot engine. Buy and pour in a can/bottle of cooling system cleaner. This will get most, if not all, of the contaminants that inevitably build up in cooling systems. Follow the directions. After engine cools, drain the cooling system, flush thoroughly with clear water, then change out the hoses, water pump and T-stat. Now is a good time to do a second clear water flushing. Get as much junk out of the system that you possibly can. Dispose of properly. Empty plastic 1 gallon milk jugs work well for disposal purposes. Thoroughly clean all old gasket surfaces. A rag stuffed into the T-stat hole will help keep old scraped gasket materials out of the T-stat port. Just carefully pull the rag up out of the hole. A wet rag will help keep the gasket material stuck to the rag. Carefully blow out the water pump housing with low-pressure compressed air. Use the new gaskets and replace the T-stat and water pump. Use new clamps when replacing hoses. Get as close to recommended torque specs as you can. DO NOT OVERTIGHTEN. Also check for obstructions on the radiators. (Leaves, twigs, bugs, etc.). Clean as necessary. Use at least a 50/50 anti-freeze/coolant mix. Most vehicles can use up to a 60/40 mix. (60% anti-freeze/coolant). Don't forget to re-fill the coolant recovery bottle to the "Full when cold" level. Start 'er up. Check for leaks. Run it up to operating temperature. Shut 'er down. If coolant level in the plastic recovery bottle is low, add fluid to the "Full when hot" level. You should be good to go. Follow your vehicle manufacturer's recommendations for coolant/anti-freeze miles or time intervals for replacing coolant/anti-freeze. Don't let coolant stand in a puddle or leave it in an open container. Dogs and cats love that stuff but it's fatal to them.
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    Thanks. Will look into it

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    Quote Originally Posted by Adeelnm View Post
    Hi,

    So last week I went to Islamabad on my 7th gen Civic. Even though the trip was safe and sound, there was something that constantly bothered me throughout the motorway trip both times, going to isb and coming back.

    The car started to heatup as soon as I constantly drove at 130 for about 10 minutes or hit 140-150 for a few minutes while overtaking. Then I had to lower my speed to 110-120 to keep the needle below 50% mark. I even made a short stop at Bhera just to check the water level in radiator and it was okay.

    Can someone tell me why is this?
    Your car's radiator is probably dirty and needs cleaning. get it cleaned properly and your problems will be gone.

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    Quote Originally Posted by dayrider View Post
    Your car's radiator is probably dirty and needs cleaning. get it cleaned properly and your problems will be gone.
    I am not sure what process cleaning follows but when I went for car wash before the trip, I asked him to use pressure water in it to clear any blockage etc.

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    Quote Originally Posted by Adeelnm View Post
    I am not sure what process cleaning follows but when I went for car wash before the trip, I asked him to use pressure water in it to clear any blockage etc.
    They open the radiator and clean all the blockades thoroughly. It's quite necessary to get that done. In your case, this can be a major cause of heat up

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    Quote Originally Posted by dayrider View Post
    They open the radiator and clean all the blockades thoroughly. It's quite necessary to get that done. In your case, this can be a major cause of heat up

    The amazing thing is that, for the past 2 years since I bought the car, the car never went above 40-45% in the city. I have been involved in a couple of heavy traffic jams and also traveled on Ring Road but it never heat up. That's why I was so concerned about it.

    Even now, it's been over a week since I returned and the heat needle has remained below 50% mark

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    This is due to blocked radiator.Same issue happened with my car last year after radiator cleaning my car never heated up again .

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    Quote Originally Posted by moooniraja View Post
    This is due to blocked radiator.Same issue happened with my car last year after radiator cleaning my car never heated up again .
    Do i have to go to a mechanic/workshop or ask the car wash people to clean it?

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    Quote Originally Posted by Adeelnm View Post
    Do i have to go to a mechanic/workshop or ask the car wash people to clean it?
    Mechanic/workshop

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    Default Civic 7th Gen heatup issue on high speed

    Quote Originally Posted by Adeelnm View Post
    Do i have to go to a mechanic/workshop or ask the car wash people to clean it?
    After u r done with remedy. Ask the service station guy every 15 days regularly to pour pressurised water directly to radiator from some distance (to save radiator) to eleminate all dirt from radiator.


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    Use air pressure to clean radiator as water pressure damage the radiator

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    Simply go to radiator cleaning shops they will remove the radiator and clean its lines with acid and your radiator will be fine . Change thermostate valve and radiator cap if required.

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    Service station pressure water is cold and is not recommended if engine temperature is hot.

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    Default Civic 7th Gen heatup issue on high speed

    Quote Originally Posted by asad1 View Post
    Use air pressure to clean radiator as water pressure damage the radiator
    Been practising this since ages. Never found damaged radiator thread but the amount of dirt this practice take out is truly astonishing.


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    Get radiator cleaned and flushed.
    Change thermostat.
    Refill with coolant from Honda 3S.
    Start and warm engine. Coolant level will drop. Top up as required.
    This should suffice.

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    Default Civic 7th Gen heatup issue on high speed

    Quote Originally Posted by shabbir233 View Post
    Get radiator cleaned and flushed.
    Change thermostat.
    Refill with coolant from Honda 3S.
    Start and warm engine. Coolant level will drop. Top up as required.
    This should suffice.
    How much the thermostat cost? Talking about same car


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