Question about 1999 BMW 318 ti

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Water leak coming from back of engine. 1998 BMW 318i 1.9

My son was in the car idleing (with girlfriend) when he suddenly noticed steam coming from under the hood. He got out and found water all over the ground. He called me to help. When I got there we were able to find enough water to fill the radiator only to see it poor out from where the engine meets the transmission. I loosened the radiator cap and carefully drove it home. The temp gauge never passed normal. Today I tried to fill the radiator with water only to have it poor out from the same place at the rear of the engine. All i can see back there is a junction block with 3 water hoses and some electrical connections. But that doesn't look like where it is leaking from. There are other hoses back there but it looks like you would have to remove the engine head to replace them.

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  • Anonymous Mar 31, 2014

    How to replace the heater core hose of bmw 318 is 1997

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See attached pic of the coolant hoses and see if any are in the vicinity of where the water is coming from at the rear of the engine:

http://www.realoem.com/bmw/showparts.do?model=CG83&mospid=47506&btnr=11_1567&hg=11&fg=35

here is your heater core which would also carry coolant. it has 2 hoses that go in and come out of the core. see if water is coming from one of these hoses.

http://www.realoem.com/bmw/showparts.do?model=CG83&mospid=47506&btnr=64_0663&hg=64&fg=15

head should not have to be removed to replace the hoses and/or heater core, but it will not be the easiest job either.

good luck & hope this helped.

Posted on Jan 28, 2009

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Hi, on these engines they have a plastic elbow at the back of the cylinder head that gat brittle and break inside the head, it may look ok but it would be a good place to start to look for a coolant leak as this is quite common. regards mark.

Posted on Jan 28, 2009

  • mark brown
    mark brown Jan 28, 2009

    Hi, on these engines they have a plastic elbow at the back of the cylinder head that get brittle and break inside the head, it may look ok but it would be a good place to start to look for a coolant leak as this is quite common. regards mark.

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