I was driving my civic today and it started knocking. So when I got home I left the car running and was looking under the hood. Ok if you standing in front of the car looking at the motor the sound is coming from the lower right corner from around where the pullys area. I don't think it is a rod knocking because the run's fine and if your driving it everything seems smooth. Also it won't do it after about 2200 rpms thats why I think its a pully but I wouldn't think that they would make a sound like this. If it was a rod knocking would it still run normal because I wouldnt think so but I have never had a car to do anything like this before.

 

i believe if its a rod it gets louder as the rpms go up...

 

Thanks for the input does anyone know what it may be...

 

have you had the timing belt done recently?

Did they do the water pump too?

 

We did put on a new belt but we didn't do a water pump

 

check the tension on ALL of your pulley bolts...the balancer, the tensioner, everything!