Rear lower arm replacement
Q An advisory on the MOT for my wife’s Ford Focus 2001 1800cc petrol hatchback says the two rear lower control arms will need replacing soon. I have tried to remove one of the arms, but the two bolts holding it are seized on and will not budge. I have been spraying them with WD40, but this does not seem to be making any difference. Pete Munday
A I have come across these bolts on the Ford rear suspension myself and certainly know of your plight. Strangely enough, the very similar suspension set-up found on the rear of the Mazda version of your wife’s vehicle does not suffer from this problem, in my experience.
WD40 is good, but for extreme cases of corrosion I would try using Plusgas. Autosessive can also supply an excellent release agent manufactured by Comma: http://bit.ly/2ybvsve
If you have access to an airsaw, you could try simply cutting through the bolts at the inner edge of the arm and replacing them with new. Alternately, you could grind off the head of the bolt, then attempt to draw it out by tightening up the locking nut.
As this is only an advisory, you do have time on your side, so hopefully using a release agent over a period of time prior to carrying out the job may be enough to free the bolts.