Remote Servo on a 66 MGB GT / anyone fitted one?

Oh, and something else, after reading through the fitting instructions there is a note saying to add 'a non-return valve' in the vacuum hose, which of course is not supplied in the pack. But then again it does say(where fitted) in brackets every time it mentions it. Does this mean an inline non-return valve is necessary or not!!? If you have a servo installed please let me know if yours has one fitted. Thanks, Jim

It's been a few years - OK well about 35 - since I worked in the field of brakes, but in those days both Girling and PBR (Australian brand) vacuum brake boosters came with a non-return valve which was combined with the fitting where the vacuum pipe went into the booster. The purpose of the valve is to retain a bit of vacuum in the booster so when the engine is not running, you still have a couple of applications possible with some level of boost.

I'd suggest you put one in, for the few times you might need it - they should not be very expensive.

Cheers

Cheers David,

You are right, there is one already a plastic valve where the pipes connects to the body of the servo, but an additional one is noted inline with the pipe itself. I will probably get one for when I come to fit it.

A group reader has sent me some detail pics of his Lockheed servo fitted on a 74 plate, there is no inline one fitted there.

I did notice however that his induction manifold had provision for the vacuum pipe to fit to. Mine is different, I may need another manifold instead of drilling the one currently fitted.The problem then is,are the carbs the same, i hope so.

Thanks for your reply,

Jim

For anyone reading this needing an answer.

The pre 74 models were offered servos as optional. The standard manifold on pre 74 cars can take an adapter which is available from

up: Adaptor - Brake servo ADU1402this threads into the plug bolt onto the top of the manifold nearestto the front of the car. This is where the servo pipe gets connectedto.

hope this helps, i know i could of done with my advice a few weeks ago, I had one supplier telling me i had to buy a 74- manifold and then grind down parts of the exhaust manifold to get it to fit !!!

Don't believe a word of it, some people are happy to screw your car up for a sale.

The salesman was a guy called tony who sells stuff on ebay, based in watford i think. beware. the advice needless to say, was wrong.

Jim

I've seen the various notices saying that pre ''74 cars had no servo fitted as standard. Mine, a UK registered originally ''72, wire wheels, chrome bumper, which I bought in the 80's, has one fitted so I don't know when it was installed. Was there an option to buy a car with the servo fitted or did they all have to be retro-fitted?

I have a braking problem which I have 'ventilated' in this forum but didn't get an answer, viz. brake binding after a few km of running, which goes away after about 15mins and returns again after another few kms. of running. I suspect the servo is leaking across the diaphragm - anybody any experience with this?

I see in the latest (UK supplier) Moss catalogue that they only offer one single brake line servo unit as a replacement unit. In previous issues they had two, and they also had versions with two different 'diameters' - I emailed them as to what diameter they meant but got no answer, again, anybody got any experience with different models for different years or sizes??

Thanks, Barry

They didn't have them fitted as standard.

You could always block off the vaccuum to the servo and see if it still happens.