E46 316 over heating proplem
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  1. #1
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    over heating proplem

    hello all. i need your help and advice on my car. please read my thread. thanks

    my car is over heating so am a member of RAC recovery. i called them 3 days ago and the mechanic come and checked the car.

    few things he checked after i told him about the heating problem

    1) he open the radiator cap and filled in some water, it was pretty ful few hours earlied but i think he half litre in ( helf litre is gone missing in engine some where)

    2) he looked around in but he didn't find any external leaking, he goes, if any pipe split or radiator problem then it the water leak will be slower but as i told him, it lose water like 5 -6 litre a day. so he goes water is going somewhere inside the engine so he goes its internal leaking.

    3) from the exhaust pipe, water is dripping slowly and hence engine is hot but still white smoke coming out.

    4) he said, it can't be thermostat or radiator because it wouldn't lose water that quick so he goes either its head gasket or water pump. but he goes, he think its head gasket is gone.

    5) i asked him about compression test, he goes there is no need for that. you need to do CO test instead.

    he goes, head gasket or pump is still a big job to do, if you will get it fixed, the mechanic will have to look all the bits like pump, pipes etc so it cost you around about 600 - 800 quid.

    yesterday

    today i filled water into radiator and drove like 30-40 miles. it worked good, heating came on and lpg was working.

    but coolant light keep coming on, so in between driving when car get cold, i checked the coolant, it was less. so i filled it again. but it never heat up.

    in the end, when i was coming home, i saw a white smoke which i think was steam coming out of bonnet. i stopped the car and looked around, there were steam water near the radiator and from the radiator cap, little bit steam coming out and little bit water too.

    i think, when all car coolant system is sealed then you can't hear gurgle noise if m right? you only hear the gurgle water noise when water is leaking out somewhere in a steam.

    i went to a garage and told him everything and i also smell something coming out of heater, he said it might be engine burning the water. i am going to back to him on Friday to get it checked out

    do you think, it is head gasket? as it run well for 40 miles but water little bit missing and there was NO water dripping from the exhaust today. it was bit leaking from the radiator cap and steaming from there too.

    today,
    things getting worse with my car, now there is no white smoke from the back but i can see a proper bad leakage underneath my car, not a dripping but like you open the tap of water. in 5 mins, all radiator water is on the floor.

    the leakage is not from the front but where the plastic cover is underneath, its coming from there.

    what you all think, what it could be??????

    sorry for this big essay but please do give me advice and if anyone have this problem, they can read all and get some help from this thread as well.

  2. #2
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    The first port of calls would be:

    - Check the radiator for bowing.
    - Check the expansion tank for cracks.

  3. #3
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    over heating proplem

    Radiator bowing is common, but if it was that bad it would spray coolant all over the engine bay as it did with mine, also plastic connector at the back of the engine is another common place, don't know why he said the water pump would be about 600 it would be nowhere near that price if that was the problem. Have a look through the bottom grill on your front bumper and you will be able to see if the radiator is bowing.

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    its simple for them to test if the H/G has gone they will test the coolant for carbon monoxide

  5. #5
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    Quote Originally Posted by Lee_h View Post
    Radiator bowing is common, but if it was that bad it would spray coolant all over the engine bay as it did with mine, also plastic connector at the back of the engine is another common place, don't know why he said the water pump would be about 600 it would be nowhere near that price if that was the problem. Have a look through the bottom grill on your front bumper and you will be able to see if the radiator is bowing.
    i have seen so much steam coming out and i bonnet the bonnet and water is everywhere and after that, there was so much leakage underneath. the steam and bubble coming out of from the cap. i checked the cap later on, as normally i heard when you press the underneath of cap, it will move up and down. right?

    but the cap wasn't moving so i bought a new cap and it move up and down a bit. do you think that could cause a problem?

  6. #6
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    hi,
    i am taking my car to garage tomorrow morning.

    is there any text or anything thing, i tell him? he will check the leakage

  7. #7
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    i mean test*

  8. #8
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    1) Sniff test and;
    2) compression test.

    1) Takes some coolant out and checks it for contaminants such as Oil and cardon monoxide
    2) Checks to see if your headgasket has given up and is allowing coolant into.

    I think that should reveal it.

    But I'd check the radiator for bowing first!

  9. The Following User Says Thank You to Nathb For This Useful Post:

    Jim (10-11-2012)

  10. #9
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    how to check radiator for bowing first? can i check it myself or any symptoms?

  11. #10
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    Check it yourself.

    Look at the bottom of the radiator, if it's shaped like a bow you need a new one!


    How a new radiator looks - notice the straight edges:


    How a fudged one looks:


    Notice the "bowing/sagging" at the top and the bottom.

  12. The Following 2 Users Say Thank You to Nathb For This Useful Post:

    Jim (10-11-2012),Ronnie (09-11-2012)

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