Glow Plugs

[marlin758]

BMWScan is showing that I have 2 faulty glow plugs - Apart from the blue fog ( and neighbours coughing ) in exceptionally cold weather starts it doesn't appear to cause any problems.

I have bought 2 to replace them but am wary about starting the job after reading various comments about them snapping in the head and then a head off job to sort it out. 

How common is this ? Anyone had it happen or anyone changed them without problems ?

Or has anyone any tips to avoid it happening ? 

[malc1950]

Hi i have 3 heater plugs showing up faulty on my scanner and like you on cold start up i send a cloud of blue smoke into next doors garden but then the x runs ok, its just the first start up in the cold ,
i also have heard the plugs tend to snap off in the head ,i think the trick is to get the engine fully warmed up before you attemt to remove them,
i have decided to leave mine alone for the moment till i get more advice , 

[fenj66]

same here, 3 plugs showing as faulty but car starts just fine albeit with the blue fog.
i wouldnt chance them snapping until i have to do it, ie, car wont start anymore. :cry1:

[Rusty]

Think I had 4 faulty on mine but it started fine, but after changing all six (best to do all at the same time or it's a lot of stripping down to do the others later ) it started even better.


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[X MAN]

[quote="marlin758"]
BMWScan is showing that I have 2 faulty glow plugs - Apart from the blue fog ( and neighbours coughing ) in exceptionally cold weather starts it doesn't appear to cause any problems.

I have bought 2 to replace them but am wary about starting the job after reading various comments about them snapping in the head and then a head off job to sort it out. 

How common is this ? Anyone had it happen or anyone changed them without problems ?

Or has anyone any tips to avoid it happening ?
[/quote]

  Very hesitant to replace mine either in case of snapping them , 5 are showing as faulty on the scanner but car starts just fine albeit with a puff of smoke .

If you do replace them the only tip i can offer is to soak the glow plugs (thread) overnight with a
generous amount of duck oil . I have always used duck oil as its silicone free and does not dry out quickly unlike WD40. 

[marlin758]

Thanks everyone .

I think I may do the same as most of you and leave well enough alone for now .

Apart from it's anti-social behaviour it starts and runs fine