My car is making a knocking sound from the engine bay what sounds like on the left side if looking at the car from the front. any clue on what it is and how to fix it?

 

When does it happen? What causes it to happen?

FS

 

like as soon as i turn the car on and in all gears you can hear it knocking and as i speed up or rev the engine u can hear it too

 

Its probably your tpms sensor rolling around in the tire

 

is it low on oil?

 

Does it increase when you speed up or stay the same? also I hope you checked your engine while on under the hood to see if anything is loose. If its more of a clicking noise you might just have a pebble stuck between your brakes and tires (happened to me a few times annoying as hell but a quick left right turning of the wheels over a bump does the trick to free the pebble.)

 

nice, point your toes, dismount.

beers

 

the sound is comming from what is to be the top of the headers anyclues?

 

Do you hear it only when the car is moving? Or do you hear it when the car is stationary with the engine running? Or both?

 

both

 

 

up up up

 

I'm having a similar problem. I couldn't reproduce it for the Mazda techs. Mine only happens at idle. Sometimes when the car's cold and sometimes when the car's warm. It comes and goes. Starting to drive me crazy quite frankly. My sounds coming from the same area highlighted in the picture. Sounds like it's coming from the intake somewhere down on the side of the motor.

 

Man that is wierd to see the brake booster on the other side!

 

air pump? ssv?

 

so does anybody have a clue because this has to to be the most annoying sound.

 

What are you doing in Houston with a right hand drive car?

 

I just found a pic and circled the spot were thesound was coming from. and what wrong with aright hand drive car in houston?

 

NOthing wrong don't get excited. Just curious.
I am thinking it might be the air pump. Can you here the noise with the hood up?
See the black round thing on a black plate to the left and down a hair? That is the air pump.
Check it out.
It's right on the edge (left) of the pic above the strut bar.

 

yah u can heat it with the hood up. i don't think its that because i toll a screwdriver and put it to my ear and i was getting the most vibrations/sounds from the circled part in the pic.

 

chris,

you have an 04 correct... is it an auto or 6speed. how many miles are on it???

what mods have been done if any? is it rhd or lhd? i know it is just a pic but the more info the better...

does the knock increase with engine rpm or stay the same?
does the knock change if you put the clutch in or out?

beers

 

its a 2004 auto 65,000 miles its dropped on tein sprints, and has 18x7.5 rims wrapped in kuhmo Exsta 245/45/18's it lhd, when i acceleratre or rev the sounds stays the same but jsut goes faster and in park or all gears u can hear it sound doesn't change pitch it literally sounds like there is a "rock bouncing around in therE"

 

its not the airpump but know ther eis hardly even a sound like its going away. this is weird.

 

where you able to fix the noise?

 

Younggen didn't your engine burn up. Is this the new engine knocking? Theres no tapins to lift the pistons so I don't know. Could be some kind of carbon build I had that happen to 1973 Cadillac I owned back in 1979. I ran some engine flush through it and gunned the engine after and drove it about 30 miles on ther expressway, it stopped and I drove it for another 4 years.

Take it back to your Mazda dealership. Hopefully they can hear it and fix it.