Optima L4-2.4L (2001)
9. Using an 8mm drill, drill four (4) holes in the locations marked in the previous step. Debur all 8mm holes.
CAUTION
10. Use the following procedures to remove as much of the rust fragments as possible from inside the subframe.
a) Strike the underside of the subframe lightly with a hammer to cause vibration and dislodge any rust scale.
NOTICE
b) Insert a magnetic pick up tool through each of the four 40mm holes and pull the magnet along in either direction as far as possible to remove any
larger fragments.
c) Insert either of the two air blow guns into each of the four 40mm holes and use shop air to blow as much of the rust particles as possible from inside
the sub frame. In some cases, if there is a large amount of loose rust scale present you may have to repeat the above steps another 2 to 3 times.
