Knocking Noise from Engine Bay
Today a knocking noise started when driving. It comes from the engine bay and sounds like a metallic tapping noise, possibly from the top of the cylinders.
It's regular and it doesn't happen at all when sitting idle or when stationary even if revving the engine. It continues knocking when coasting in neutral and the knocking doesn't speed up or slow down while coasting in neutral and revving the engine. It does get a bit louder and faster when going quicker though and slows down as the car slows down.
I lifted the bonnet when I got home, can't see any fluids leaking anywhere and checked oil which is OK. When I tapped the engine cover it sounded very similar to the noise I could hear when driving which makes me think it's maybe a cylinder problem??
I'm rubbish with engines but would like to know what to expect to be the problem, and if I should keep driving it. I was going flat out for 10mins or so (6600rpm) about 20mins before the noise started.....
It's got new cam belt pulleys timing belt etc. The driveshaft has some play in it...dunno if it could just be something to do with that??
Is this a good question?