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Thread: Liana's overheating cause

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    Default Liana's overheating cause

    Dear Members. can experts please shed some light on liana overheating issue. Mainly what could be the cause of overheating. I have heard that liana's radiator dries the water in it only coolent is the solution then no heatup issue.


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    MODS plz move it to correct section. i have mistakenly posted in this section.

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    well dear if its overheating only in Ac so u should change ur radiator cap .... coz few days back i also faced this kinda problem ... but now after changing the cap ... no heating problem ... im not using any coolent in my car ... just simple water .... nothing else

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    If you want to prolong the life of your engine and avoid overheating issues, kindly do use coolant. The best coolant in the market is not expensive than your ride, so always put coolant and not just plain water. Do not go for cheap ones, at least Caltex orange or your OEM one should be used.
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    the liana engine locks in air when you add coolant like an oaf - that needs to be bled out.. otherwise the coolant can boil -- bad bad thing..

    Coolant is not that expensive - about 100 rs for a bottle, you car would take 4 litres of it at 30% concentration making the kharcha to be 150 for coolant and about 50 rs for distilled water, not that expensive - and it wont evaporate too. - peace of mind and everyday usage, is what a car is for - not opening the bonnet everyday

    Another point, are you checking coolant/water by removing the radiator cap, the expansion tank is there for a reason, it also has 2 marks on it that say full and low - thats where you check the coolant level.

    Anytime you open the radiator cap air can enter the system and lock inside
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    Quote Originally Posted by Xulfiqar View Post
    the liana engine locks in air when you add coolant like an oaf - that needs to be bled out.. otherwise the coolant can boil -- bad bad thing..


    Anytime you open the radiator cap air can enter the system and lock inside
    xulfiqar bhai please dwell upon the lines written above.
    Thanks in advance.
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    the placement and position of the liana engine makes the radiator cap and engine top nearly even - just shy of a few mm. now if your car is facing downwards , you may see the radiator filled up by the cap but the engine is empty a little. You may either

    1 fill with the car pointing upwards (easy)
    2 bleed the air from the bleeder valve at the back of the head. (you must be a certified masochist)

    About opening the cap and locking in air, YES it can happen just like in the old 95 civic. That car also suffered this same design problem.

    When filled properly and with the proper stuff - you dont need to open up the cap everytime. Just check from the expansion tank - it should be above full mark on a hot engine and on the full mark when cooled off.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Dear Xulfiqar,,
    Would you please elaborate this phenomena so i get it clear and give some daily preventions and advises to get rid of this heat up issue. i would highly oblige it. Regards

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    There is no reason for Coolent to stay and water to evaporate. First of all check if there is any leak in the radiator or the rubber pipes.
    I hope it will solve your problem if not replace your Head Gas kit last solution to over heating

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    the coolant you use is an alcohol - moreso its ethylene glycol. this raises the boiling point of water and also lowers its freezing point too go way beyond waters freezing point.

    Anyways - when pure water is recovered in the expansion tank from the radiator it is hot and was not boiling due to the radiator pressure cap. - The hot water evaporates due to engine heat and its own heat. The coolant you add does not allow this - and it remains in its own volume - doesnt decrease.
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    Quote Originally Posted by Xulfiqar View Post
    When filled properly and with the proper stuff - you dont need to open up the cap everytime. Just check from the expansion tank - it should be above full mark on a hot engine and on the full mark when cooled off.
    some times in hot summer with a/c drive,coolents also boils in expention tank,what damage boiling coolents can do?
    And for the hotter engine, its ok that expention bottle keeps the hot lequid at rising than above level every time you check but is it also Ok if the colder engine keep its coolent level near the low mark every time for over night start?
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    ^keeping it that low can allow air into the radiator as the pipe that recovers coolant is usually dipped in from the top and goes till nearly the low mark - sometimes a little above it - the coolant gets sucked back and if for some reason it was low it will suck air when there is no liquid left.

    The reason to keep it full or max is that that expanded liquid is held above the full line and when cooled off the engine will suck it back and surely will not suck in air thats why there is a large gap from the bottle full mark and its fill neck - to hold excess liquid.

    Anyways boiling coolant usually means - stuck radiator cap, overheated engine or an air problem in the cooling system.. (air problem can be an air lock, low coolant/water, bad headgasket or just as simple as a leaking expansion tank pipe.
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    Quote Originally Posted by Xulfiqar View Post
    ^keeping it that low can allow air into the radiator as the pipe that recovers coolant is usually dipped in from the top and goes till nearly the low mark - sometimes a little above it - the coolant gets sucked back and if for some reason it was low it will suck air when there is no liquid left.

    The reason to keep it full or max is that that expanded liquid is held above the full line and when cooled off the engine will suck it back and surely will not suck in air thats why there is a large gap from the bottle full mark and its fill neck - to hold excess liquid.

    Anyways boiling coolant usually means - stuck radiator cap, overheated engine or an air problem in the cooling system.. (air problem can be an air lock, low coolant/water, bad headgasket or just as simple as a leaking expansion tank pipe.

    Thanks for informative reply and now
    how could we check the leaking 'exp tank' pipe?
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    Gee didn't know topping up your water was an exact science and one had to worry about airlock. All i know (personal experience) is that the M13 has a really third rate thermostat valve which apparently is a bit*h to get to. Dealerships have been known to remove the cylinder head assembly to get to it. Long story short, if your radiator's ok, including the cap, remove any pipe easily accessible and crank the motor to see if you have positive flow, if the flow drops, you could have a worn out water pump, also have the thermostat checked out. 7 out of 10 times they're the culprits. If you do have it replaced, make sure its the right way round and also maybe try cutting off the brass breather pin from your thermostat and refit it. worse case, you've warped your head/block after repetitive heatups.
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    nope there may b some other problem as me using Liana 2005 automatic transmission, having no issues
    "The leading car is absolutely unique, Specially for the one behind it..." VB

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    Quote Originally Posted by Skill View Post
    Thanks for informative reply and now
    how could we check the leaking 'exp tank' pipe?
    the expansion tank pipe is a thin walled pipe which if has a tiny leak it makes a nice entry for air when the radiator coolant contracts and makes a vacuum to suck back the expanded coolant - On expansion its ok as liquid is more dense than air it may just show a little droplet leak from this hole

    On vacuum from the radiator air gets sucked in from this hole as air is some magnitudes lighter than water- hence your radiator gets filled with air and when you check the level - its LOW (or as some people say dry)

    The thermostat in this engine is a pain to get to but not impossible the thermostat usually malfunctions as low coolant level makes a foam in the cooling system which cannot open up the thermostat as foam has no solid contact with its thermostat walls
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    @ postr
    almst 90% liana radtr leak from the back side frnt bumpr

    plz chk frm that postn. .there mst b a pin hole!

    a little jerk or accdnt causes this . . .plz chk frm there

    and always use coolnt n distl watr in radtr , , no matr what kind a car u r drvn old/new

    hope this vl help

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