hay there,

can you please help me identify the problem causing the engine to make this rattle noise. THis video is not mine but my car is making the same damn sound. Please help

thanks
-m

http://www.youtube.com/watch?v=i8a9UhCggj8



noise seems to be coming from red arrow in attached pic.

 

If it is under warranty I would take it in to Mazda.

 

Sorry about your problem, Marcus, though I am unfamilair with it personally.
Are you getting a CEL?
Have you checked to see if the idler bearing is good? That was an issue with some of the earliest cars, though I have been spared.
Is the engine mount on that side (fluid-filled) still good? Could it be that the engine is resting on metal-to-metal?

As Ken suggested, if still under warranty take it in. If not try to look at these other things.

 

If your car is still warranty you better send it to the dealer workshop and if not... As i watch your video clip... That sound is probably not coming from outside the engine... Basically that kind of sound is a connecting rod bearing... But as you said and as you shown on your attach picture since the sound was coming from the front of your engine... And there was nothing there to create that kind of sound aside from timing chain and defective ac compressor... Because pulley and bearing doesn't sound like that...

 

He might be right about the timing chain tensioner, which is hydraulic and relies on engine oil pressure?

 

Hi there , wow that has got to be number 1 connecting rod bearing , remove the sump and oil strainer , remove number 1 piston connecting rod bearing cap , unfortunately you will see it has picked up on the crank sorry to bring you bad news , i had a mazda 6 with the exact same noise sometimes the noise can dissapear but then when the engine is revved hard the rattle comes back . Sorry for the bad news. Take it to the Nearest Dealer and tell them to inspect the the crank / Connecting rod bearings they will soon find the fault .