Clutch lightening Servo - BEWARE
Discussion
DaveG said:
The installation instructions are here:-
http://tr4a.weebly.com/uploads/2/1/9/8/21980360/re...
Here is a picture of the placement in my Griff.
Thanks very much. http://tr4a.weebly.com/uploads/2/1/9/8/21980360/re...
Here is a picture of the placement in my Griff.
The servo is a very tight fit when keeping the original washer reservoir position, almost don't need the brackets!
Dungman said:
Thanks very much.
The servo is a very tight fit when keeping the original washer reservoir position, almost don't need the brackets!
Have you managed to fit it?The servo is a very tight fit when keeping the original washer reservoir position, almost don't need the brackets!
The only way I have managed for it to 'fit' is with the long nose pointing backwards towards the rear corner, closest to the engine. With it sitting here, the water bottle just about fits in its original location. But then I have to push the servo further in, which means the nose will be pointing too far upwards. I can't move the water bottle towards the centre of the car as I have AC and the drier is there.
I am also trying to use the angled bracket that came with the 'kit' in order to get the correct angle and position for the servo as well as fixing it to something so it doesn't roll around in there. Am I wrong in thinking that this can be fitted in that space and that the servo can also be bolted to it? I can't for the life of me work out what the physical sequence of events needed in fitting this can possibly be. I can sort of get it in position, but I can't work out how to then get anything in there to be able to bolt it to the bottom of the car.
Following some sound advice (thanks Iain) I am seriously considering ditching the nose location and putting it in the boot.
I will try an get some photos in the next few days, but basically similar orientation to what you describe. Should be within the 25 to 45 degrees.
There is no way I can find to use the main bracket in the kit. Planning to make a small bracket to attach to 1 of the bolts on the back of the servo. The front bracket fits with slight modification and will bolt through the inner wheel arch.
Pipe work should arrive tomorrow or Monday, will update.
There is no way I can find to use the main bracket in the kit. Planning to make a small bracket to attach to 1 of the bolts on the back of the servo. The front bracket fits with slight modification and will bolt through the inner wheel arch.
Pipe work should arrive tomorrow or Monday, will update.
I looked into putting it at the bottom corner of the boot today and it makes a lot of sense. The access is very good and easy. Even the pipe runs work well.
The only thing I have to decide is if I want it there as it does spoil the look of the boot.
Maybe if I made a cover out of black leatherette it might look better.
I will try one last time in front first though.
The only thing I have to decide is if I want it there as it does spoil the look of the boot.
Maybe if I made a cover out of black leatherette it might look better.
I will try one last time in front first though.
Success!!!
In fitting it that is.
I managed to get it into the space at the front where the carbon canister was. This time though I turned it around and placed the pointy end facing forwards. It fit with the bracket on and with the bulb of the servo up against the wheel arch there was enough space to get the washer bottle in as well.
For fixing I drilled from under the car into the metal plate and used a pair of self tapping screws and it is solid.
I used solid pipes to connect to the servo, about a couple of inches long, and these where formed into 90 and 180 deg bends, and then switched to steel braided flexible pipes going back though the hole where the hose from the carbon canister went back to the tank, under the steering rack, and these connected to the slave unit and the pipe removed from the slave that goes up to the master cylinder.
The vacuum pipe goes up through the route the other hose from the carbon canister took through the wheel arch and that is fixed to the inlet manifold with the non return valve.
I wish I could have got some pics but you can't swing an ant in there but the key change I made was turning it round to face the other way, and that's how it fits in there.
It's fiddly in that you have to take out the radiator and carbon canister but straight forward after.
I have to finish putting the rest of the car back together before I can fill the system, bleed it and test it but as soon as I have, I'll let you know how it goes.
In fitting it that is.
I managed to get it into the space at the front where the carbon canister was. This time though I turned it around and placed the pointy end facing forwards. It fit with the bracket on and with the bulb of the servo up against the wheel arch there was enough space to get the washer bottle in as well.
For fixing I drilled from under the car into the metal plate and used a pair of self tapping screws and it is solid.
I used solid pipes to connect to the servo, about a couple of inches long, and these where formed into 90 and 180 deg bends, and then switched to steel braided flexible pipes going back though the hole where the hose from the carbon canister went back to the tank, under the steering rack, and these connected to the slave unit and the pipe removed from the slave that goes up to the master cylinder.
The vacuum pipe goes up through the route the other hose from the carbon canister took through the wheel arch and that is fixed to the inlet manifold with the non return valve.
I wish I could have got some pics but you can't swing an ant in there but the key change I made was turning it round to face the other way, and that's how it fits in there.
It's fiddly in that you have to take out the radiator and carbon canister but straight forward after.
I have to finish putting the rest of the car back together before I can fill the system, bleed it and test it but as soon as I have, I'll let you know how it goes.
well done and 10/10 for determination 
Hi, I've just stumbled over this thread and am looking for some advice. I'm afraid my vehicle isn't a Chimaera but there is a link, albeit tenuous.
I've got a Discovery 1 V8 that had the 3.9, then a 4.6, then a twin turbo 4.6 and now a 6.0 chevy LS. (tenuous link made)
The clutch with the LS was extremely heavy so I fitted a remote brake servo to the system in much the same way you all have, however I can't get it to work properly. I've tried an extra inline 1 way valve on the vacuum line but I'm still getting the problem that there is very little actual servo assistance. If I press the pedal it initially feels like it's providing assistance but about halfway through the travel it gives up and kicks back through the pedal.
I've bled the system multiple times using the two person method, using a mityvac and also using a pressure bleeder so I'm fairly sure there's no air in the system.
Can anyone help?
I've got a Discovery 1 V8 that had the 3.9, then a 4.6, then a twin turbo 4.6 and now a 6.0 chevy LS. (tenuous link made)
The clutch with the LS was extremely heavy so I fitted a remote brake servo to the system in much the same way you all have, however I can't get it to work properly. I've tried an extra inline 1 way valve on the vacuum line but I'm still getting the problem that there is very little actual servo assistance. If I press the pedal it initially feels like it's providing assistance but about halfway through the travel it gives up and kicks back through the pedal.
I've bled the system multiple times using the two person method, using a mityvac and also using a pressure bleeder so I'm fairly sure there's no air in the system.
Can anyone help?
Help is at hand!!
Mine was exactly as you describe on my car which is fitted with a triple plenum and fitted with a highlift camshaft creates very little vacuum.
I still kept the vacuum line connected to the brake servo but also inserted a tee piece into the line and lead this to an electric vacuum pump.
I am fairly sure I stated this further up the thread.
The vacuum pump is available online. If you can’t find it I will have a look and see if I still have a record of the company. From memory they did two types.
Mine was exactly as you describe on my car which is fitted with a triple plenum and fitted with a highlift camshaft creates very little vacuum.
I still kept the vacuum line connected to the brake servo but also inserted a tee piece into the line and lead this to an electric vacuum pump.
I am fairly sure I stated this further up the thread.
The vacuum pump is available online. If you can’t find it I will have a look and see if I still have a record of the company. From memory they did two types.
sidewaysste said:
Hi, I've just stumbled over this thread and am looking for some advice. I'm afraid my vehicle isn't a Chimaera but there is a link, albeit tenuous.
I've got a Discovery 1 V8 that had the 3.9, then a 4.6, then a twin turbo 4.6 and now a 6.0 chevy LS. (tenuous link made)
The clutch with the LS was extremely heavy so I fitted a remote brake servo to the system in much the same way you all have, however I can't get it to work properly. I've tried an extra inline 1 way valve on the vacuum line but I'm still getting the problem that there is very little actual servo assistance. If I press the pedal it initially feels like it's providing assistance but about halfway through the travel it gives up and kicks back through the pedal.
I've bled the system multiple times using the two person method, using a mityvac and also using a pressure bleeder so I'm fairly sure there's no air in the system.
Can anyone help?
Kicks back? dont mean to state the obvious but you have plumbed in the hyd's correctly ? not back to front I've got a Discovery 1 V8 that had the 3.9, then a 4.6, then a twin turbo 4.6 and now a 6.0 chevy LS. (tenuous link made)
The clutch with the LS was extremely heavy so I fitted a remote brake servo to the system in much the same way you all have, however I can't get it to work properly. I've tried an extra inline 1 way valve on the vacuum line but I'm still getting the problem that there is very little actual servo assistance. If I press the pedal it initially feels like it's providing assistance but about halfway through the travel it gives up and kicks back through the pedal.
I've bled the system multiple times using the two person method, using a mityvac and also using a pressure bleeder so I'm fairly sure there's no air in the system.
Can anyone help?
Hi, I'm fairly sure I plumbed it correctly - the line nearest the vacuum servo is from the master and the one on the end goes to the slave.
I tried hooking up my mityvac and used it to pull 0.5bar vacuum, but it made no difference.
I'd have thought a 6 litre v8 with a standard cam would pull plenty enough vacuum? certainly the brake servo works ok.
I tried hooking up my mityvac and used it to pull 0.5bar vacuum, but it made no difference.
I'd have thought a 6 litre v8 with a standard cam would pull plenty enough vacuum? certainly the brake servo works ok.
Does the servo have an adjustable plunger?
You need the actuating plunger of the servo to just touch the piston of the master cylinder when bolted up.
Worth noting for anyone replacing the brake servo. As these (and the master cylinder) are no longer OE they may not be correctly matched so will need adjustment.
Steve
You need the actuating plunger of the servo to just touch the piston of the master cylinder when bolted up.
Worth noting for anyone replacing the brake servo. As these (and the master cylinder) are no longer OE they may not be correctly matched so will need adjustment.
Steve
Sorry! yes you were.
I can understand needing a separate vacuum pump if I were running a very aggressive cam (all in good time..) but this one's about as mild as mild gets and if a MG B series lump can pull enough vacuum at idle, I'd be stunned if an engine over 3 times the displacement doesn't.
I'd also have thought that using the mityvac to drag vacuum should have made the servo work even if the engine couldn't pull enough vacuum?
I can understand needing a separate vacuum pump if I were running a very aggressive cam (all in good time..) but this one's about as mild as mild gets and if a MG B series lump can pull enough vacuum at idle, I'd be stunned if an engine over 3 times the displacement doesn't.
I'd also have thought that using the mityvac to drag vacuum should have made the servo work even if the engine couldn't pull enough vacuum?
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