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Thread: Glow Plugs

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    Default Glow Plugs

    I have a glow plug issue and would like to get them changed and considered it to be a fairly easy job, but my mechanic basically said dont try it.

    He said they used to be chunky like spark plugs but now they are small and fragile and can easily snap in situ, which would equal a big bill.

    So what do you think is it better to get someone to do it, or do it myself?

    Not sure how many they are or where they are located on the 120 cdti but any advise is appreciated

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    Regular Member Dazzy2006's Avatar
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    There are 4 of them to change and yes they are fragile and yes they can snap off and land u with a big bill but...........

    Iirc most people squirt them all with wd40 and leave them to soak overnight which reduces the chances of them shearing off

    Imo for what it will cost to get them changed i'd rather pay a garage then if they do snap its their problem

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    Regular Member jimbojetset's Avatar
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    Just done mine today (first time) on my 150 cdti with no problems... Once undone they were a little tight to pull out but managed it no problem.
    You need a 9mm deep socket + extension bar... and when you fit the new ones they only require a small nip to tighten up.

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    Regular Member macdad's Avatar
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    Default

    Quote Originally Posted by fattony View Post
    I have a glow plug issue and would like to get them changed and considered it to be a fairly easy job, but my mechanic basically said dont try it.

    He said they used to be chunky like spark plugs but now they are small and fragile and can easily snap in situ, which would equal a big bill.

    So what do you think is it better to get someone to do it, or do it myself?

    Not sure how many they are or where they are located on the 120 cdti but any advise is appreciated
    Well he would say that would'nt he,get yourself a long thin 9mm socket ,remove covers by squezeing together,and nice n steadily remove glow plugs ,easy job made to look hard by the so called pros.

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    Regular Member amir2300's Avatar
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    Quote Originally Posted by jimbojetset View Post
    Just done mine today (first time) on my 150 cdti with no problems... Once undone they were a little tight to pull out but managed it no problem.
    You need a 9mm deep socket + extension bar... and when you fit the new ones they only require a small nip to tighten up.

    after how many miles have you changed yours?

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    Regular Member barney490's Avatar
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    There are four glow plugs on the 120 and unlike the 150 where they are on top of the head with easy access, the 120's are at the back of the head and are tricky to get to. It's easier if you remove the EGR valve and also a small fuel block, which gives you better access to plugs on cylinders 1 and 2.

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    Regular Member jimbojetset's Avatar
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    Quote Originally Posted by amir2300 View Post
    after how many miles have you changed yours?
    Only had the car a month so hard to say. I only changed them because the glow plug on cylinder 1 was showing open cct (knackered) when measured and bringing the spanner light on for 5 mins every morning... so I changed them all...

    ...and barney490 is right... on my 150 they are easy but on the 120 they are much more awkward...

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