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9:th-Jun-2021, 20:15:00
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.
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.
