Step 8: Removing the No.2 Idler Assembly
In order to remove the idler you must first remove 4 bolts(10mm) from the small plate that surrounds the no.2 idler. Pry the plate back and forth so it loosens then slide it up.
It will be caught by the electrical raceway, there are several clips on each side that you have to open in order to open the raceway. It is not necessary to completely remove the raceway, just bend it enough to let the plate pass by.
Once you have the plate off you can use your special 90 degree 14mm box end wrench. The 4 bolts(12mm) are exposed enough that you can place the wrench on and use a pair of pliers to initially loosen the bolts. Clean this surface like the others and clear any debris that fall into the hole. Tape it closed when finished.