MOT pass advisories

[foot2firewall]

My S3 passed its MOT today, with a couple of advisories and comments:
Servo pipe cracked - easy to replace, does anyone know whether its 1/2 inch or 3/8 inch? The tester also commented that there didn't seem to be much servo effect - it might be there's a leak on the pipe, if not is there a way of testing a servo?
Play in steering rack inner joints - not an MOT fail because they are hidden, the tester also commented that replacing them might not make any significant difference - is this anyone else's experience?

[phillpot]

think the pipe is 3/8" (10mm)

Put a brake pipe clamp on the pipe then try brakes (carefully) should be a noticeable difference.... Lot more pedal effort required!!!!




Steering rack, speak to a specialist like Kiley Clinton

Edited by phillpot on Friday 11th April 20:56

[Oldred_V8S]

phillpot said:

think the pipe is 3/8" (10mm)

Put a brake pipe clamp on the pipe then try brakes (carefully) should be a noticeable difference.




Steering rack, speak to a specialist like Kiley Clinton

KC refurbed mine last year for the same reason. Very reasonable and an excellent job. Nice people too.

[foot2firewall]

Thanks for the feedback, will try the servo test over the weekend and put the steering rack down as a 'next winter' project

[S2Mike]

Pipe is 3/8 inch available on fleabay, just changed mine, sold by the metre length, which is just about six inches too long, a quick chop and jubilee clip on, job done. Maybe it was deteriorating on inside, so by changing it could cure the problems.
Not recorded as an advisory, but my MOT tester commented on the "play" in the steering on mine, he was happy with it as "Its a 24 year old TVR"

Edited by S2Mike on Saturday 12th April 21:03

[v8s4me]

S2Mike]...Pipe is 3/8 inch available on fleabay..........[/footnote said:

Make sure you get vacuum pipe as heater hose or similar may collapse under the vacuum.

[S2Mike]

v8s4me said:

S2Mike]...Pipe is 3/8 inch available on fleabay..........[/footnote said:

Make sure you get vacuum pipe as heater hose or similar may collapse under the vacuum.

.
Good point which I omitted to mention!

[shoab]

To test your servo. With the engine off pump the brake pedal several times to exhaust the servo, then hold your foot on the brake pedal and start the engine whilst holding pedal pressure. The pedal should go down as vacuum is put back into the servo. No need to rev engine as vacuum is higher on tickover. This is how the tester would test for servo working. If there is a leak on the pipe to manifold which is highly likely it will significantly affect servo assistance. No need for any clamps with this method.

Graham

[mep12345]

v8s4me said:

Make sure you get vacuum pipe as heater hose or similar may collapse under the vacuum.

On eBay also be careful as many list as vacuum pipe and it isn't. Make sure it is reinforced. You can tell those who are taking the p*** as when asked if it will stand up to brake servo they'll just reply it's vacuum pipe and use is your responsibility!!