Glow plug replacement - Things to consider

[everson38]

Always best to soak area in WD40 a few days before, does help but not always, undo it slowly if any resistance and do it back up slightly and spray WD40 to the thread, and repeat until it comes out, most make the mistake of undoing it in one go and the end snaps off, not all is lost if it does, cover the broken plug with a sheet of metal or wood and run the engine, if necessary drive as normal it will blow it out eventually and it will go like a bullet, if you don't cover it, it will go through the cover and dent the bonnet, keep the new one handy to replace it when it does blow out.
If it snaps and leaves any thread in the hole it may be a head off job.

Putting the new one in, I used silicone grease on the thread and tighten to specified torque setting, do not over tighten it, they do not need it.

I done my Astra H with 108.000 miles and they came out as good as new, take your time and they will come out, always use the same make, don't be tempted to use cheap one's, I always use Beru and at a push Bosch.

Hey Pal thanks for the detailed response. Couple questions
1)When you mention about potential for the tip to break off, wouldn't that piece fall into the engine combustion chamber and how would it fly out if I have to put a piece of wood / metal, won't that just trap it in?
2) Also you say to but some wood and metal over the hole if that did happen, would the car even run / start on 3 glow plugs-
3) Quality plugs - I looked at some plugs and the Bosch are about £30 but the beru are about £130 (b4 discount) , it seems the beru on ecp website are for a A17DTS engine and the bosch for A17DTF engine (see pic) , how to tell which engine code you have?

4) I heard it's a good change them on a hot engine, any issues to doing this?

Thanks alot appreciate you taking the time



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