All:
I just posted a complaint at the NHSTA. I was hearing a noise around the engine area and it was the idle pulley. After reading some threads here. it seems to be a common problem. I decided to change the parts myself.
After taking the pulley and bracket apart I noticed a serious design flaw in the bracket. It cannot support the bending moments applied by the idle pulley shaft.
The noises I heard were from the pulley rotating off axis and rubbing (cutting) the metal from the bracket, the adjusting nut and some of the main crank shaft pulley.
I will post some images tomorrow. I forgot my camera at work. I would also try to take some pictures of the fatigue marks in the cracks using a microscope (might be hard to take the pictures).
Here is my complain to the NHSTA:
Heard noise from engine compartment. Upon investigation noticed idle pulley was vibrating and make the sound. I investigated online at www.nissanmurano.org for similar problems. I found a series of reports that the braket that holds the idle pulley was broken.
I disassemble the pulley and found the bracket broken. Upon examination of how the bracket broke seem that the bracket is under-designed. The crack seems to indicate that the bracket broke by bending fatigue. I saved all the bracket pieces and I going to evaluate under a microscope.
The failure to this idle pulley could lead to an alternator not providing energy to the car and a more serious consequences.
Sorry for my bad English and poor grammar, i'm just typing too fast and not reading back for mistakes.
I just posted a complaint at the NHSTA. I was hearing a noise around the engine area and it was the idle pulley. After reading some threads here. it seems to be a common problem. I decided to change the parts myself.
After taking the pulley and bracket apart I noticed a serious design flaw in the bracket. It cannot support the bending moments applied by the idle pulley shaft.
The noises I heard were from the pulley rotating off axis and rubbing (cutting) the metal from the bracket, the adjusting nut and some of the main crank shaft pulley.
I will post some images tomorrow. I forgot my camera at work. I would also try to take some pictures of the fatigue marks in the cracks using a microscope (might be hard to take the pictures).
Here is my complain to the NHSTA:
Heard noise from engine compartment. Upon investigation noticed idle pulley was vibrating and make the sound. I investigated online at www.nissanmurano.org for similar problems. I found a series of reports that the braket that holds the idle pulley was broken.
I disassemble the pulley and found the bracket broken. Upon examination of how the bracket broke seem that the bracket is under-designed. The crack seems to indicate that the bracket broke by bending fatigue. I saved all the bracket pieces and I going to evaluate under a microscope.
The failure to this idle pulley could lead to an alternator not providing energy to the car and a more serious consequences.
Sorry for my bad English and poor grammar, i'm just typing too fast and not reading back for mistakes.