Survey by Qualaroo
+ Reply to Thread
Results 1 to 20 of 20

Thread: ***Help plz,,,,,Mehran heat up on AC***

  1. #1
    PakWheeler Follow
    fadi_fadi's Avatar
    Join Date
    Oct 2008
    Location
    Islamabad
    Age
    35
    Posts
    226
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default ***Help plz,,,,,Mehran heat up on AC***

    Salam to all


    2 days ago i install AC in my brother's Mehran (VX),,,,,,,the cooling is good but the problem is that car heat up when turn AC ON.


    Running speed of car fan is good and water circulation in radiator is also checked and clean,,,,,,,,,but still car heat up with AC.


    Plz help me in this regards........prompt rply will be highly appreciated.


    Thanks in advance

  2. #2
    Senior PakWheeler Follow
    air_explorer's Avatar
    Join Date
    Aug 2005
    Location
    Karachi
    Age
    31
    Posts
    1,316
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Remove AC,just use fan,everything will be ok.
    Valle!! the great with his YZRM1 looks more coool!

  3. #3
    Senior PakWheeler Follow
    OptimusSS's Avatar
    Join Date
    Oct 2007
    Location
    Karachi
    Age
    26
    Posts
    2,247
    Follows
    0
    Following
    0
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    had the same issue when i first put up the ac. it worked well for 4 years without heating up. but last weak it started again. don't know whats the problem but its hell irritating. will let you know when i get time to figure it out.

  4. #4
    PakWheeler Follow
    ali5128438's Avatar
    Join Date
    Apr 2009
    Location
    Islamabad
    Age
    24
    Posts
    428
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    mehran main a/c yar na zulam kia karo.. mehran is not for a/c

  5. #5
    PakWheeler Follow
    papubhai's Avatar
    Join Date
    Feb 2008
    Location
    Lahore
    Posts
    700
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    mehran has 4 wheels..isnt it enuf????
    AC is for winter use only
    Never take life seriously. Nobody gets out alive anyway........

  6. #6
    440
    440 is offline
    Senior PakWheeler Follow
    440's Avatar
    Join Date
    Aug 2007
    Location
    Rawalpindi
    Age
    23
    Posts
    2,341
    Follows
    1
    Following
    0
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    hahahahahahahahha.nai yar me using the mehran vxr company fitted A/c there is a heat up problem but now its fine i am using it for 3 years now .the solution is buy a thermostat switch jis ko radiater k saath connect karo aur thermostat valve remove kardo wala phir A/c pe beshak jahan marzi jao guage will not rise inshallah try it me using the same
    honda+toyota+suzuki =440 =D epic yo!!

  7. #7
    PakWheeler Follow
    toocool's Avatar
    Join Date
    Mar 2009
    Location
    Karachi
    Age
    30
    Posts
    183
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    this is common problem with mehran becase of the old technology that paksuzuki is still using(the same fx engine) the bigest example of modern technology in local assembled small cars is the coure(coure has the very good ac as compare to mehran keeping in mind that coure has 850cc engine which is 50cc more then mehran which is not a big difference) so the best solution for your problem is that dont use AC in mehran(please dont get me wrong for that) but if you still want to use AC so there are some tips that can help you.
    1.drive your car on petrol rather then CNG.
    2.use 3 line radiator
    3.always use some good coolant
    4.remove thermostate valve
    5.use bigger fan and put relay on it

  8. #8
    PakWheeler Follow
    fadi_fadi's Avatar
    Join Date
    Oct 2008
    Location
    Islamabad
    Age
    35
    Posts
    226
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    h2/h2

    @toocool, thanks for useful tip..........but we can't stop using of AC as we spend money on it otherwise it will be wasted.


    Any how i will try to act upon ur tips.


    Guys any other sugesions r welcom.......

  9. #9
     is offline
    Follow
    's Avatar
    Join Date
    Jan 1970
    Posts
    0
    Follows
    0
    Following
    0
    Mentioned
    Post(s)
    Tagged
    Thread(s)
    Problems Posted
    Problems Solved
    Best Answers
    Good Answers

    Default

    check the gaskit of ur car may be ur car is reducing water level

  10. #10
    Senior PakWheeler Follow
    khanji_143's Avatar
    Join Date
    Dec 2004
    Location
    Karachi
    Age
    29
    Posts
    1,005
    Follows
    0
    Following
    0
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    same problem wid ma liana
    Inappropritiate Language. Removed

  11. #11
    Senior PakWheeler Follow
    ahm13's Avatar
    Join Date
    Aug 2006
    Location
    Karachi
    Posts
    1,046
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    remove the thermostat. that should solve the propblem..





    otherwise you have to buy a aftermarket 3 naali wala radiator.


    my problem was solved using aftermarket radiotor..
    "I have never won a debate with an ignorant person" Hazrat Ali (RA)

  12. #12
    PakWheeler Follow
    SILVERBULLET's Avatar
    Join Date
    Oct 2005
    Location
    Islamabad
    Posts
    123
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    @ahm13..bro how much after market radiator(3 naali wala ) costs??
    BE NICE TO THE PEOPLE ON YOUR WAY UP BECAUSE YOU WILL MEET THEM ON YOUR WAY DOWN

  13. #13
    PakWheeler Follow
    fadi_fadi's Avatar
    Join Date
    Oct 2008
    Location
    Islamabad
    Age
    35
    Posts
    226
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    @ahm13


    bro, i remove the thermostat but still engine is heating up,,,,,,balke ab tou AC ke baghair bhe heat up ho rahe hay.


    1 more thing that mechanic install condenser b4 fan,,,,,,,is it like so in mehran or not,,plz confirm???


    some 1 told me to change the gasket and asking kharcha around Rs.2000/-


    i wantto know whether it will solve my problem or not?

  14. #14
    PakWheeler Follow
    adnanaa35's Avatar
    Join Date
    May 2009
    Location
    Lahore
    Age
    33
    Posts
    358
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    i have also same problem in kyber i cleaned the radiotor ;changed the cup of the radiotor so that when heated coolent will inserted into the radiotor ;at MAX level of coolent bottle inserted Coolent if not solved the poblem than installed a rely into radiotor fan.....that inshallah solved ur problem . that will cost not more than 500/-

  15. #15
    PakWheeler Follow
    devilzz1's Avatar
    Join Date
    Feb 2007
    Location
    Islamabad
    Age
    36
    Posts
    131
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Toocool has given a very good solution, i would like to add on to it that, its a small engine and cng puts an extra load on the engine so turn your vehicles ac off whenever you start from zero and then turn it on in third gear and do not push the car beyond 70 in third, smooth transition of gears will reduce the load on engine.
    HUSTLE, LOYALTY, RESPECT

  16. #16
    Senior PakWheeler Follow
    syncview's Avatar
    Join Date
    Apr 2006
    Location
    Lahore
    Age
    28
    Posts
    3,364
    Follows
    7
    Following
    1
    Mentioned
    436 Post(s)
    Tagged
    2 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    1

    Default

    Hey, when was the last time you did get your radiator serviced?
    Also, I have a mehran as well, and with AC these days, the needle never goes any further beyond the 'half' point. With the stock radiator and stock automatic fan. No thermostat valve though. Check if you have a coolant leak somewhere? Change your radiator cap and get a good one. They are meant to 'hold' pressure inside and if they don't do so, can also result in overheating especially when the car is under constant load. Check for leaks in pipes, joints / connections to the CNG Kit.. etc. Get your head gasket checked by a good trusted mechanic, they never go out easy (as per my experience) so double check that. A relay for your radiator fan would help the weak wires, but mehran, by stock has one for the radiator fan. Use 60% coolant and 40% water in the radiator.

    And oh! Get your water body checked, also by a good trusted mechanic and the timing / timing belt as well.
    https://www.facebook.com/OsamaAbbasPhotography

  17. #17
    PakWheeler Follow
    haroon_180's Avatar
    Join Date
    Jun 2009
    Location
    Lahore
    Age
    41
    Posts
    3
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Hi,

    Mehran is a small and poorly designed car that has a historic problem when it comes to ACs. Typically the AC doesn't quite work well and for old cars, the Car ends up heating up.


    General Causes of heat up


    There are a number of reasons why cars, specially old ones heat up. Problems may be one or more of the following:

    1. Engine needs to be overhauled/li
    2. Begin needs to be changed/li
    3. Clutch plate needs to be changed/li
    4. Radiator needs to be serviced or cleaned/li
    5. The radiator cap needs to be changed (YES THIS IS QUITE IMPORTANT). The spring in the radiator cap is very important. When the water steams up, it pushes part of a cap up and water is allowed to circulate. If your cap is damaged, your car will heat up)/li


    These are causes of car heat up if one or more things are wrong with the car. Obviously, you will need to get your car checked for any of the above mentioned problems to get the car fixed.


    REMEMBER, a few days before you take your radiator to be cleaned, poor in some anti scale and anti rust water treatment chemical in it and let it run for a couple of days. This would remove any kind of scale that is hindering the heat exchange. After the radiator is cleaned MAKE SURE TO PUT ONLY FILTERED WATER in the radiator, as poor quality water leads to severe scaling of the radiator.


    Mehran AC Design Flaw


    Another reason why ACs cause heatup in Mehran is a design flaw, namely the fact that the Radiator and AC Condensor are stacked one on top of the other. What does that mean?


    Water flows in pipes through the engine and absorbs the heat. The hot water comes to the radiator, and passes through thin capilaries covered by the fins of the radiator grill. The air passing through the radiator grill, cooling the water. The cooled down water goes back into the engine. This process goes in a cylce, keeping the engine cool. You have a fan installed behind the radiator grill that SUCKS the air in, to help the process.


    SO ... the radiator has to be COOLER if any kind of heat exchange is to take place.


    The problem is that the AC condensor, which is the RADIATOR of the AC is placed DIRECTLY UNDERNEATH the radiator. The AC works on the same principle of heat exchange, but, basically, the AC gas needs to get cooled. When the AC gas passes through the AC condensor, it tries to loose its heat. This HEAT, heats up the RADIATOR, which is unable to cool the water. So, as only hot water keeps going back into the engine, the engine gets progressively hotter, until you come to a point where you turn off your AC, stop the car and poor water out of the bottles you have stacked under your seat.


    There are a number of things you can do to solve this problem


    Replace the radiator fan with a bigger fan (I put in a corolla fan) with a relay.


    Put a similar fan, with slight modifications to the bumper infront of the AC Condensor


    If you are adventurous, you can get a slight modification done where you can shift the condensor slightly inside, so the condensor is not EXACTLY under the radiator. In this way, you can easily put the fan on the outside without modifying the bumper


    Make sure your gas is full and radiator is in good working order.


    Interesting solutions


    There are a number of other solutions I have seen. The people who did these changes say they work but I haven't actually tried them myself.


    One friend of mine has installed another water bottle (exactly like the one for windscreen wipers). He installed the complete system from an old mehran and placed the two water jets so that they point towards the radiator. According to him, whenever his temprature meter starts going up, he presses a button and it sprays the radiator with water, cooling it for a while.


    Another friend of mine has a Carrier installed on top of his car. He welded a large sheet of metal (painted white) on top of it It is as wide as the car and slightly larger than the length of the roof. It looks very strange but is like the car is always in the shade. And it DOES work really well. In fact, waiting on traffic signals is much much painfree, as you are always under a shade. It is a very innovative and practical solution .... if you dont mind the goofy looks of your car (and of course, slightly compromised aerodynamics).


    I saw an interesting solution on pakwheels. One guy had cut a square piece of his bonnet above the radiator and installed a fan throwing the air out upwards. He claims this works.


    This has given me an idea AS I AM WRITING this. Maybe we can install a fan pointing downwards directly under the condensor, so that it gets blown downwards (only disadvantage, relatively hot air moves upwards naturally)


    Hint


    Always try to use shades for your windows. By personal experience, your AC performance would go up significantly.


    Hope this helps

  18. #18
    PakWheeler Follow
    IRONMAN's Avatar
    Join Date
    Jul 2004
    Location
    Islamabad
    Age
    40
    Posts
    87
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    direct the fan in summers and make it automatic in winter. That should solve ur problem.

  19. #19
    PakWheeler Follow
    FM01's Avatar
    Join Date
    Feb 2008
    Location
    YYZ, Karachi, Pakistan
    Age
    36
    Posts
    369
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Agree with Haroon_180's suggestion above


    There are a number of things you can do to solve this problem


    Replace the radiator fan with a bigger fan (I put in a corolla fan) with a relay.


    Put a similar fan, with slight modifications to the bumper infront of the AC Condensor


    or if there is enough space on the radiator you can put a smaller fan beside the bigger radiator fan to increase the cooling process, as Mehran is not equipped with AC fan. Usually with AC cars they supply two fans or one big one to handle the extra heating generated during AC use.

  20. #20
    PakWheeler Follow
    haroon_180's Avatar
    Join Date
    Jun 2009
    Location
    Lahore
    Age
    41
    Posts
    3
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    I saw a guy who had cut a part of the bottom of the bumper and put a fan for the AC condenser. You can search for it on another Pakwheels forum

+ Reply to Thread

User Tag List

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •