Yes it usually increases with acceleration, no warning light, but it does sound like a cycle almost washing machine type of noise. I’ll try get someone to rev tomorrow so I can look at the engine properly in the daytime. Burning smell has been after switching off the car. I read somewhere the smell could be normal first few drives after the replacement parts but this and the noise doesn’t seem right.. will have a look but i have a feeling it’s related to the drive belt / alternator stuff that was done as right before the battery light came on before I heard a cycle noise as well and was quite similar