Unless someone has fitted the wrong plugs, for both 8 and 16 valve engines you will need a 10mm plug spanner, which is 5/8" (or 16mm) across the flats. Both engines have the plugs way down in the head, so a good quality plug socket with a rubber insert, and with a locking mechanism to the socket extension bar is recommended.
(If the wrong plugs have been fitted, the socket size is 13/16 (21mm) AtF)
what oil do i need for my astra 1.6 petrol. 58 plate
it means a fault with the engine electronics or immobilizer really need a good code reader to find out it could be something or nothing
These days most, if not all, spark plugs come pre-set. If you get the right ones there is no need to check the gap, you just fit them.
how do i know when my glow plugs need to be changed in my vauxhall astra cdti
every 100k mate
10w40 semi synthetic
7 mm
Its a M14 star bit
By far the easiest way to answer this is to advise that you get the haynes manual for your model Astra. The subframe will need to be dropped to remove the gearbox.
To change a headlight on an 08 plate astra, you need to go in through the wheel arch with the streering lock full on.
The Amber light with a Spanner in it is a Service light. Telling you that the vehicle is in need of a service (Replacing the Oil, Oill Filter, Air Filter etc.) Your Vauxhall Dealer can take the amber light off using Tech 2.
The spark plug gap for a 1.4L Vauxhall Corsa should be set at 0.8mm. Spark plugs are preset and do not need adjustments when purchased from an auto parts store.