can someone please help?
i have recently bought a 1991 bmw 318i m40 saloon & on 1st starting it sounds great but after a few minutes the engine gets a loud knocking & engine dips before revving up on throttle, then after another few minutes it goes again.
a friend said it could be the oilpump or tappits? but i dont think its coming from top-end? it has the correct amount of oil in it but if you take oil filler cap off when engine is running no oil can be seen splashing about inside? please if anyone can help it would be greatly appreciated.
manyy thanks in advance. paul.