Gday Mazda,madaz2012 wrote:yep been there done that, I had one do it to me about 10months ago after doing a service on it, about 3-4 others I know of in town that have done it..
that's what that humming noise is at idle when they are hot at times, the oil pump changing pitch,
obviously a one way valve of some description probably should have been used to stop the oil running back like that..
I have a 2013 BT which has just had its 1st 10k svc and is now occasionally making the hum when hot at idle. Does this mean the pumps lost its prime? Or is the noise normal. It wasn't making the noise prior to its first svc and reading this has me worried that damage has been done. I have no lights on the dash indication low oil pressure so i'm reasonably confidant some oil is circulating.