My Astra G 1.6 16v engine is making some unusual ticking noises.
At first I thought it was just low on oil, but having checked it and topped up, the ticking persists.
On closer examination it sounds like it's coming from one of the pully's on the timing belt. Could it be on its way out?
Also when I pull away, the ticking speeds up.
the engine is current;y on 97K miles if it helps?
Can anyone help or shed some light as to what the ticking could be?