i have a 2002 2 litre petrol honda accord, for some time now the engine has been very lumpy on tickover, but drives fine.
However started up this morning to a terrible noise from engine even though no problems the previous day, all belts seem ok can anyone help

 

"lumpy tickover" won't be enough. Does engine turn over slowly but eventually start, or turns over fine but takes extended starting time?

How many miles on this engine? Regularly maintained?

Does noise persist after starting or goes away immediately after engine starts/runs?

Was noise a banging rattle, high-pitched screech, or other?

good luck