At 22:29 2002-08-09 +0200, willpower did say:
Do you think it’s possible to retro fit the vacuum servo system
as used on earlier cars? I reckon that the servo unit could be
bought brand new for about �150-�200 and maybe another �150 for
someone to fit it, if I can’t do it myself but would I need a
different master cylinder?
In addition to whether it mechanically could be done (ANYTHING is possible
here if you’re determined), there’s the matter of whether it would be
LEGAL. Would your car pass inspection (which differs from jurisdiction to
jurisdiction)? If you had an accident, fatal or otherwise, (say, just by
coincidence, you had a brake pad that bound up), and the accident
investigation turns up that your car was modified to remove this safety
feature, what sort of result do you figure that might have on the outcome,
and who would get stuck with the liability, even if the modification wasn’t
ultimatley to blame?
This is a car that you should enjoy driving and not have to worry
that touching the brakes could catapult you to the other side of
the road.
I expect that if they’re properly maintained, this isn’t a real risk. Any
braking system which isn’t maintained properly runs the risk of serious
failure.
Heck, all sorts of things can go wrong with a car. Almost 15 years ago, my
then-fiancee was travelling to my home a few days after having had her
transmission (an early-generation FWD GM) serviced at the
dealership. She was late in arriving. Very late. Sometime later, I
received a shaken call from her – she was only about 1/2 mile from my
place, where the front passenger wheel came off the car at a 90’
angle. Seems the shop forgot to put in the cotter locking pin on the bolt
which retains the wheel assembly to the steering linkage, and the bolt
unthreaded. Two minutes earlier, she was shooting down the
freeway. Fortunatley, it came off after she’d come to a stop at a traffic
signal and was just accelerating across the intersection.
ALL the steps of servicing something need to be followed - skipping
loosening and tightening a brake bleeder or installing a cotter pin before
going to lunch - they all can have very significant consequences. An
improperly tuned engine could cause an accident because of a dropout when
you need to accelerate to avoid a collision. Inoperative signal/parking
lamps could cause an accident in rainy weather. Take your pick - there are
all sorts of failures you could succumb to, and at first, not all of them
seem to be safety related.
Any shop which views your car as something just like the Toyota they had in
the service bay before it simply isn’t qualified to work on it – it isn’t
because the Jaguar is some complicated or tempermental beast, but because
it isn’t a Toyota – what you want - and need - is a shop that truely
understands the specific car before working on it.
I need to know when I hit those brakes my car is going to stop
(skid marks or not) without any problems and the only thing that
worries me at the present moment is that all the jag lovers who
read these boards do not have a clue what they are in for.
I’d be considerably less worried about the ones who actually READ these
lists, and consider the many owners who are oblivious to our existance, and
trust that their mechanic is doing the right thing when servicing their car.
Then again, what’s the point in worrying about everything? Make sure YOUR
car is properly serviced, and that the service shop that previously worked
on it is made aware of the significance of the service procedure.
I always advise people to start with as complete a collection of
documentation as you can obtain. Perhaps someone with first-hand
experience with the ABS servicing will kindly edit a user-submitted
addendum to the brake system servicing section, and I can add that to my
documentation errata project?
— http://jaguar.professional.org/
Sean Straw '88 Jaguar XJ-SC 5.3L V12 (LHD) ‘Black Cat’ 65K
Marin County, California '85 Jaguar XJ-S 5.3L V12 (LHD) ‘Bad Kitty’ 210K
'69 Buick GranSport 455 V8 324K
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