Hi!


I just had an MOT failure and the ECU readout indicated a misfire, so I thought it best to change the plugs before doing anything else.

Is it difficult to change the spark plugs on my own on my 2005 2.2 petrol Croma? I haven´t found any guide online.

I assume it´s easy, but just wanted to check. What are the steps? Remove plastic panel, remove coil pack, unscrew plugs - something like that?

Are they seated deep in the engine block? Will an ordinary socket wrench with an extension do? Do I necessarily need a torque wrench to apply exactly the right amount of torque (which I think might be 20 Nm), or could I just use "common sense" to avoid damaging the threads?

Also - is it possible to reset the check engine light by disconnecting the battery for a while?

Thank you so much in advance for any advice!

/Cromatic

UPDATE: I found a video on changing spark plugs on a Vectra C engine, they are the same right, so these steps should also be the same?

Can´t post the URL here yet, but it´s on youtube if you google "How to change a spark plug OPEL VECTRA C TUTORIAL | AUTODOC"

socket wrench wont reach it, you need spark plug tool, no need for torque wrench just tighten it by feel

also petrol croma is quite rare