1999 E46 318i - Over heat

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  1. 1999 E46 318i - Over heat 
    #1
    Bimmer Fan
    Car Details
    Tribbis's Car Details
    Model of Car:
    318i
    Year of Manufacture:
    1999
    Transmission Type:
    Manual
    Car Body Type:
    Saloon

    Join Date
    Nov 2009
    Location
    West Coast
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    I have a 1999 E46 318i. The car boiled over & almost ran out of water. Found that when I switch the air con on, the temp rise very high & boil over.
    No water in oil or in the exhaust. I drive the car every day (with out air con) with no water loose. The temp stays normal in town or open road. The fan does not switch to high speed. Suspect control card on fan or am I missing something. Please help.
     
     

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    #2
    Bimmer Fan
    Car Details
    xXxStKxXx's Car Details
    Model of Car:
    325i
    Year of Manufacture:
    1993
    Transmission Type:
    man
    Car Body Type:
    saloon

    Join Date
    Apr 2009
    Location
    North London
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    I would check your waterpump is ok and then
    Try bleeding the car using the following procedure

    How to bleed the cooling system.
    1.Jack the front of the vehicle up onto stands as high as possible,
    2.Turn the ignition on,engine off,heater on fan setting 1 and temperature fully hot,
    3.Remove the rad cap/expansion cap,remove the bleed screw from the radiator and IF you have them the bleed screw(s) from the thermostat housing/top hose, return pipe or EGR thermostat.
    4.Fill the radiator up and keep pouring till there are no more air bubbles coming out from the bleeds, using a funnel that fits tight in the radiator neck and filling it full of water will help push any troublesome air out, when good you can then install the bleeds and tighten down(don't snap them),ensure the rubber O-rings/seals are still on the screws/on the bleed holes.
    5.Suck some water out so it's not full to the brim, replace the cap and then start the car. Run her up and check for heat from the vents when warm and check if over heating still persists. You may have to bleed troublesome cars twice(but rare).
    6.If all is good then check the water level again in the morning when cool.

    You may also need a new rad-cap
     
     

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