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Thread: When to replace glow plugs

  
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    When to replace glow plugs

    on my 1.7dti (150,567 miles) i dont think the glow plugs have ever been changed Under what circumstances should i change them?
    Mk4 ASTRA 1.7DTI Estate On 126K Miles Now 127k 11/10/2008 - - 129K 28/11/2008 - - 130k 04/01/2009 -- Now 138k 08/05/2009 Now 142k and a broken Diff -- 144K

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    If you feel you need to, then change them....but if they're still working fine, then why bother !

    I've got some I need to put in, mileage currently at ~125,000
    I do have an error light with the error code pointing at glow plug voltages...(same 1.7Dti)

    Not done them yet though !

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    how much are they? any special tools needed?

    only reason i ask this is because first start after itsbeen stood still for a bit it takes a good few turns to start unless i turn the ignition on and of a few times then fires strieght away
    Mk4 ASTRA 1.7DTI Estate On 126K Miles Now 127k 11/10/2008 - - 129K 28/11/2008 - - 130k 04/01/2009 -- Now 138k 08/05/2009 Now 142k and a broken Diff -- 144K

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    Here's an example price (some are more, this one's about 6 quid) on eBay http://cgi.ebay.co.uk/1x-NGK-GLOW-PL...item43a0cbac5b

    Not familiar with the Isuzu but no special tools required for mine (MK3 X17DTL), IIRC just a 12mm spanner. They also appeared to be the original glow plugs.

    Take care taking the old ones out - wouldn't want to snap them. Tightening torque is only about 17.5Nm

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    If you decide to change them spry the threads with WD40 before and after each run for a couple of days, as Paul says you won't want to break them. When you undo them slow deliberate turns, don't go at them as you would a spark plug, ease them in and out if the thread binds, using more WD40.

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