My sisters bf has a 2001 Veccy B(1.8SRi130) with Z18XE I presume (has electronic throttle) and over the weekend we cleaned out the TB (it was full of shit) and did the de-restrict airbox mod (the pipes in a Veccy B are worse than in the Astra G).
After doing this started the car and there was quite a loud ticking from the front drivers side of the engine. somewhere around the cambelt cover/rocker cover/exhaust manifold etc etc... (I didn't hear the engine before doing anything on it, so couldn't tell you if it was there before) and it is loud enough to warrant concern, but not loud enough to be heard when driving the car.
Anybody got any ideas as to what could be causing this??