2000 E46 318i, Coolant level warning light.

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  1. 2000 E46 318i, Coolant level warning light. 
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    Hi,I have a 318 year 2000 and the coolant warning light comes on now and again.
    I have checked the level several times and it is fine,any ideas?
    Cheers,Kevin.
     
     

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    Quote Originally Posted by DOGSBITS View Post
    Hi,I have a 318 year 2000 and the coolant warning light comes on now and again.
    I have checked the level several times and it is fine,any ideas?
    Cheers,Kevin.
    Level sensors on the radiator - one of them will probably be faulty, quite a common issue. Best to get it fixed otherwise you'll get in the habit of ignoring the warning light.
    "So give me one more platinum plaque and rap, you can have it back." - Dr Dre

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    Quote Originally Posted by mikaveli View Post
    Level sensors on the radiator
    He means bottom of the expansion tank
     
     

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    Quote Originally Posted by NealP View Post
    He means bottom of the expansion tank
    Which is part of the radiator, you picky bugger.
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    Quote Originally Posted by mikaveli View Post
    Which is part of the radiator, you picky bugger.
    Which separates from the rad you mean
     
     

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    Now now, lads, enough of that!

    Maybe the level 'looks' fine, but it might not be?

    Mine looked okay until I topped it up, and now it heats up faster - didn't think it was slow before!!
     
     

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    Thanks for the help guys.
    Coolant level is spot on and double checked.
    Is the sensor easy enough to do yourself and is it a dealer part only?
    P.S.Didn't mean to start an arguement.....lol.
    Kevin.
     
     

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    See Neal's reply below . Easy enough to DIY might want to drain it first or you'll get covered in cooloant.Then follow the bleed procedure to make sure you don't have any airlocks in the system

    Bleed 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.
     
     

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    DOGSBITS (01-02-2010)

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    No worries Kevin, I was having a laugh with Mike

    Sensor is quite easy to remove...see item 5 in diagram.



    Personally speaking, I would use OEM and it is not expensive either

    BMW Part: 17137524812
    Price: £10.75 inc

    See StK's instructions for bleeding correctly after you have fitted the new sensor
     
     

  13. The Following 2 Users Say Thank You to xXNealXx For This Useful Post:

    DOGSBITS (01-02-2010),mikaveli (01-02-2010)

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    Top drawer Neal!!!!
    Will take a run to the dealer on Friday.
    Thanks again guys.
    Kevin.
     
     

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