Slightly vague brakes
#21 Re: Slightly vague brakes
New pads arrived today so i will be doing that for sure
1963 3.8 FHC ..now finished …………….
1974 2.7 Carrera now as an RS Touring
1974 2.7 Carrera now as an RS Touring
| Link: | |
| BBcode: | |
| HTML: | |
| Hide post links |
#22 Re: Slightly vague brakes
well….the short version is I think I’ve got a little bit of an improvement
First thing I did was to change the pads to EBC green stuff type which were a little bit of a tight fit into the Zeus alloy callipers, but fit they did eventually
I then took the car for a short test drive, and I felt that there was something of an improvement, so perhaps the old pads were slightly contaminated
Next thing this morning was the use of gauge test kit kindly loaned by Dave K which showed I initially had a vacuum pressure of roundabout 15 to begin with which by adjusting the eccentric bolt, I managed to increase to a maximum of around about 18, not quite getting it to 20 as the manual recommends
Overall the brakes seem a little better
Perhaps what does also influence my perception of the car last weekend was driving it back to back with my old 911 which has no servo at all and requires the pedal to be pushed very firmly (and offers quite a firm resistance in operation)
The Jaguar pedal is pushed so incredibly easily in relative terms…perhaps giving me the impression that the brakes are not working
Having taken both cars out again today, there is the same difference in braking style but it does come to a stop better than it felt it was doing last weekend.
So an interesting experience to learn a bit more about the car and I now have very clean front suspension because I couldn’t resist the temptation to do some cleaning whilst I was at it……
First thing I did was to change the pads to EBC green stuff type which were a little bit of a tight fit into the Zeus alloy callipers, but fit they did eventually
I then took the car for a short test drive, and I felt that there was something of an improvement, so perhaps the old pads were slightly contaminated
Next thing this morning was the use of gauge test kit kindly loaned by Dave K which showed I initially had a vacuum pressure of roundabout 15 to begin with which by adjusting the eccentric bolt, I managed to increase to a maximum of around about 18, not quite getting it to 20 as the manual recommends
Overall the brakes seem a little better
Perhaps what does also influence my perception of the car last weekend was driving it back to back with my old 911 which has no servo at all and requires the pedal to be pushed very firmly (and offers quite a firm resistance in operation)
The Jaguar pedal is pushed so incredibly easily in relative terms…perhaps giving me the impression that the brakes are not working
Having taken both cars out again today, there is the same difference in braking style but it does come to a stop better than it felt it was doing last weekend.
So an interesting experience to learn a bit more about the car and I now have very clean front suspension because I couldn’t resist the temptation to do some cleaning whilst I was at it……
1963 3.8 FHC ..now finished …………….
1974 2.7 Carrera now as an RS Touring
1974 2.7 Carrera now as an RS Touring
| Link: | |
| BBcode: | |
| HTML: | |
| Hide post links |
#23 Re: Slightly vague brakes
Good outcome, glad it’s sorted.
Simon
62 3.8 FHC
91 Porsche 928GT
Find me on Instagram and Facebook @oldcarfixer
62 3.8 FHC
91 Porsche 928GT
Find me on Instagram and Facebook @oldcarfixer
| Link: | |
| BBcode: | |
| HTML: | |
| Hide post links |
#24 Re: Slightly vague brakes
New pads need bedding in so hopefully things should improve in time.
Danny
1962 S1 3.8 FHC (1012/1798)
2015 Range Rover Sport SVR
"Experience is something you don't get until just after you need it."
1962 S1 3.8 FHC (1012/1798)
2015 Range Rover Sport SVR
"Experience is something you don't get until just after you need it."
| Link: | |
| BBcode: | |
| HTML: | |
| Hide post links |
-
RobinAnthony
- Posts: 4
- Joined: Tue Feb 21, 2023 5:08 pm
#25 Re: Slightly vague brakes
Hi!
Based on the symptoms you've described, it's possible that there is an issue with the brake servo or the master cylinders. The fact that the brakes felt vague and there was no change in resistance after repeated pumping of the brake pedal suggests that the servo may not be functioning properly.
It's also possible that there is an issue with the master cylinders, such as partially stuck plungers. This could affect the pressure and feel of the brakes.
One thing you can try is to bleed the brakes to see if this improves the feel and responsiveness of the brakes. This will also help to determine if there is any air in the system.
If bleeding the brakes doesn't help, it may be necessary to have the brake servo and master cylinders inspected by a mechanic to determine if there are any faults or issues that need to be addressed.
Based on the symptoms you've described, it's possible that there is an issue with the brake servo or the master cylinders. The fact that the brakes felt vague and there was no change in resistance after repeated pumping of the brake pedal suggests that the servo may not be functioning properly.
It's also possible that there is an issue with the master cylinders, such as partially stuck plungers. This could affect the pressure and feel of the brakes.
One thing you can try is to bleed the brakes to see if this improves the feel and responsiveness of the brakes. This will also help to determine if there is any air in the system.
If bleeding the brakes doesn't help, it may be necessary to have the brake servo and master cylinders inspected by a mechanic to determine if there are any faults or issues that need to be addressed.
| Link: | |
| BBcode: | |
| HTML: | |
| Hide post links |