QuestionMy local mechanic put new brake lines in my 1969 RR silver shadow . After a
month I noticed the fluid was low in one side of the tank. I asked him what
brake fluid he used because I didn't want to mix brands and he said Castrol
dot 3 or any dot 3 . I looked on line and several sites said that if you used dot
3 it would ruin the brakes and the nitrile seals. I always used Castrol 363.
What should I do now? Have the lines drained and the 363 put in or has
damage been done already or just use more dot 3 like the local repairman
says. Second problem the right hand light on the dashboard (brake light)
stays on .
AnswerHi David:
It's obvious your local repair guy don't really understand Rolls Royces. The RR braking System is one of the most complex ever designed. If this guy isn't a certified RR mechanic, I suggest to take it to one.
They will completely drain and braking system immediately and replace with Castrol 363. Overtime, DOT 3 will ruin your complete hydraulic system. That is a $10,000 repair!
The fact that the brake lights remain on is another problem. That means the DOT 3 is not working well with the Nitrogen Charged accumulators. These may need to be recharged or rebuilt.
