My girlfriend has recently bought her first real car.... Astra GSi 1.8 (94). The engine is a bit noisy when starting from cold so I think the hydrolic tappets are getting a bit stuck.
My first port of call is to change the oil and filter: What oil should I use keeping in mind that it has 100K on the clock. And should I warm the motor up before draining then fill it up warm it up then re-drain... ect!?!?
Is there anything else I should check to stop the loud start?