Author |
Topic: clunk from brake servo (Read 631 times) |
|
pedropedro
Full Member
Posts: 677
|
 |
clunk from brake servo
« on: May 20th, 2010, 6:31pm » |
 Quote  Modify
|
I would appreciate some advice as I have along trip tomorrow and am concerned about a clunk from the servo that developed today
when stationary no sound, press brakes when moving every time a clunk from what seems to be the servo/solenoid area ie behind steering wheel area
obviously hard to identify as only happens when moving...any ideas....... just concerned re brakes
|
|
 IP Logged |
|
|
|
pedropedro
Full Member
Posts: 677
|
|
Re: clunk from brake servo
« Reply #1 on: May 20th, 2010, 8:35pm » |
Quote Modify
|
it is hard to identify but doesnt do in reverse so maybe its from front brake somewhere ...just sounds like from centre but hard to pinpoint...ah well suppose its ok just a worrying noise ....
|
|
IP Logged |
|
|
|
gozz
Senior Member
Been around awhile
Posts: 3475
|
|
Re: clunk from brake servo
« Reply #2 on: May 20th, 2010, 11:04pm » |
Quote Modify
|
If one of the rear wishbone bushes is excessively worn,braking causes sideways movement and could clunk,though I imagine you will have checked that.
GOZZ.
|
|
IP Logged |
|
|
|
pedropedro
Full Member
Posts: 677
|
|
Re: clunk from brake servo
« Reply #3 on: May 21st, 2010, 5:22pm » |
Quote Modify
|
yes had those checked and replaced recently,,,,,the noise this a.m. had gone, but appeared after 30 miles or so driving
its a distinct click/clunk almost exactly where brake servo is
is there anything in the servo, say master cylinder that could do this?
john
|
|
IP Logged |
|
|
|
PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
|
|
Re: clunk from brake servo
« Reply #4 on: May 21st, 2010, 6:16pm » |
Quote Modify
|
It maybe worth checking the vacuum to the servo from the manifold. I wonder if the diaphragm has started to perish slightly, this can be due to petrol getting down the vacuum pipe through a one-way valve. Now I'm not sure if Scorpio has a one-way valve or even if the vacuum comes from the manifold. I had a similar problem with my Zodiac last year, the diaphragm was perished and this was causing the spring to 'clunk' back into place after the brakes were released, cause was the vacuum pipe one way valve allowing petrol down the pipe. Just take the pipe off the servo an snuffed it! There will be a slight whiff of petrol, but it won't be damp and really reeking.
Peter.
|
|
IP Logged |
I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
|
|
|
Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
|
|
Re: clunk from brake servo
« Reply #5 on: May 21st, 2010, 9:01pm » |
Quote Modify
|
I had planned to run OBD on my car over the weekend to see what readings I get (with regard your other post about the MAF/gearbox flare). One of the things I was going to do was introduce an unmetered air leak at the manifold to see what effect it had.
If it turns out an air leak is making this clunk the 2 problems may be related.
|
|
IP Logged |
ABS multiplug wheel sensor pins MK IV or MK 20
|
|
|
pedropedro
Full Member
Posts: 677
|
|
Re: clunk from brake servo
« Reply #6 on: May 21st, 2010, 10:58pm » |
Quote Modify
|
i appreciate the interest ....I await your findings......
I have obd sware as well so can follow your results
john
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print