sorted clonk but new problem .

[daz the plumber]

after having the clonk noise on the front end when on rough ground and weird angles i have sorted the problem , i purchased a full set of upper and lower ball joints and track rod ends from flea bay (£80)., i can not beleive the difference ,the steering feels stiffer and its so solid , the two mechanics were done and dusted in a few hours . there is allso the new problem i need to sort , ive noticed the break pedal as stopped traveling and its rock hard, it might be the master cylinder , can any one give me advice thanks .

[HRG]

Does it coincide with fitting the new joints? If so I'd be inclined to check everything has landed in the right place and you haven't accidentally dropped something in a caliper.

[daz the plumber]

i noticed it before and it came to my attention when i drove a mates 5l and found my breaks are rubbish .i have braided break pipe , ebc turbo grooved discs and green sruff pads , they were very good when they warmed up . the pedal as no movememt its nearly solid .

[HRG]

Probably worth cracking a bleed nipple or two to see if it's at the master cylinder end or one of the slaves.

[GreenV8S]

A failed servo could cause that so check the vac line is intact. Do the brakes actually work at all?

[daz the plumber]

yes they do, when tou first press the break they are rubbish then when you press then straight after there seems to be a little more travel .

[2Munkys]

daz the plumber said:

yes they do, when tou first press the break they are rubbish then when you press then straight after there seems to be a little more travel .

You know what Daz, I'm suddenly experiencing the same phonomenon myself. I had this a couple of years ago and I'm not sure I remember what I did to fix it. I'll be having another look this weekend given the chance.

It's something that can be experienced when the engine speed is low (sub-idle) and there is insufficient vacuum being created to open the non-return-valve in the plenum. Whip that out and check its operation as well as the hose for collapse/punctures etc.

Let us know how you get on.

[That Daddy]

daz the plumber said:

after having the clonk noise on the front end when on rough ground and weird angles i have sorted the problem , i purchased a full set of upper and lower ball joints and track rod ends from flea bay (£80)., i can not beleive the difference ,the steering feels stiffer and its so solid , the two mechanics were done and dusted in a few hours . there is allso the new problem i need to sort , ive noticed the break pedal as stopped traveling and its rock hard, it might be the master cylinder , can any one give me advice thanks .

Daz,check the vacuum hose that goes from the inlet manifold and into the O/side inner wing(may have Codan printed)and to the brake servo,it takes a right battering from the heat of the exhaust manifold,you will have to bend it around while its idling and you may hear it sucking in air from the air line cracks,if your lucky this may also be why your plugs are white because you have an unmetered air leak causing lean running under small throttle openings(high vacuum)and would explain the hard(un assisted)brake pedal,mine hose was fine then within the space of 6 months had developed these cracks on the bend takes about 30 minutes to change(bit fiddly) got to be worth a try.

Edited by That Daddy on Wednesday 15th October 10:12

[daz the plumber]

where is the non return valve

[chrispitman]

located in the pipe fitting screwed into the plenum.

[That Daddy]

daz the plumber said:

where is the non return valve

It was on the servo body(pushed into a rubber bung)on my car,as per standard with ford servo,s,you will have to remove the clutch master resevoir inspection cover to check.

Edited by That Daddy on Wednesday 15th October 20:34

[daz the plumber]

checked the pipes , no splits or anything,i took it to a local garage and he thinks its the master cylinder ,ive noticed the tvr surpliers like to charge so is there a lucas part number thanks

[2Munkys]

daz the plumber said:

checked the pipes , no splits or anything,i took it to a local garage and he thinks its the master cylinder ,ive noticed the tvr surpliers like to charge so is there a lucas part number thanks

So, you got any further with this Daz?

I had another look at mine this weekend. The NRV is operating corretly and when creating a vacuum (a big suck), all would appear serviceable with the hose. However, I'm wondering if you removed the 'Jubilee' clip from the plenum end of the hose. I removed this from mine and found a couple of small hidden cracks which possibly extended the full depth of the hose wall. Having enough length, I removed half an inch of tube to make for a fresh connection. I've banged a number of miles in over the weekend without issue . . . . . so far so good.

Fingers X'd!