salaar Posted July 8, 2016 Author Share Posted July 8, 2016 Okay but I haven't touched the other three, would you not expect some pedal pressure? Right now the cylinder is below min, can that cause no pedal pressure as there isnt enough fluid in the system to squeeze the calipers? I'll bleed it all today and see how it goes. Quote Link to comment Share on other sites More sharing options...
salaar Posted July 8, 2016 Author Share Posted July 8, 2016 Okay but I haven't touched the other three, would you not expect some pedal pressure? Right now the cylinder is below min, can that cause no pedal pressure as there isnt enough fluid in the system to squeeze the calipers? I'll bleed it all today and see how it goes. Quote Link to comment Share on other sites More sharing options...
Ric Posted July 8, 2016 Share Posted July 8, 2016 You lack the basic understanding of brakes and brake fluid hydraulics, Please take it to a garage, you'll need a trailer. Quote Link to comment Share on other sites More sharing options...
samm Posted July 8, 2016 Share Posted July 8, 2016 Okay but I haven't touched the other three, would you not expect some pedal pressure? Right now the cylinder is below min, can that cause no pedal pressure as there isnt enough fluid in the system to squeeze the calipers? I'll bleed it all today and see how it goes. It's not four seperate systems they are all connected so if you have air in one it effects the rest of the braking system. Quote Link to comment Share on other sites More sharing options...
salaar Posted July 8, 2016 Author Share Posted July 8, 2016 Doesn't help at all, I'm learning through the process, taking an interest. Mistakes will occur. Everyone was learning at one point - my trade is Physiotherapy and I'm trying to learn more about cars. - - - Updated - - - It's not four seperate systems they are all connected so if you have air in one it effects the rest of the braking system. Thanks a lot, will bleed and report back Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 8, 2016 Share Posted July 8, 2016 If you've only disturbed the one caliper and the reservoir is just low and didn't run dry, then bleed this one calliper as above then see how the pedal is? Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted July 8, 2016 Share Posted July 8, 2016 As you are in Yorkshire your closest port of call is Chris Wilson, give him a call and see if you can book the car in. As Ric said, brakes are not something you want to be messing with if you have no idea how they work. It's a recipe for disaster! Good luck with getting it sorted Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted July 8, 2016 Share Posted July 8, 2016 As you are in Yorkshire your closest port of call is Chris Wilson, give him a call and see if you can book the car in. As Ric said, brakes are not something you want to be messing with if you have no idea how they work. It's a recipe for disaster! Good luck with getting it sorted Chris Wilson is no where near Yorkshire. Any local garage will be able to sort this TBH. Quote Link to comment Share on other sites More sharing options...
salaar Posted July 8, 2016 Author Share Posted July 8, 2016 Haha, happy to take hits when its deserved. My dad said the same but I'm too curious and properly wanna learn! Okay, I'll top up the fluid then bleed the front right and see how it goes, if not I'll bleed the rest beginning from rear left and if that doesn't work I'll prepare to take out a loan haha. Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted July 8, 2016 Share Posted July 8, 2016 Chris Wilson is no where near Yorkshire. Any local garage will be able to sort this TBH. I meant most local forum trader and at least if you booked it in with him you know he would give the car a good informed look over at the same time. Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 8, 2016 Share Posted July 8, 2016 Haha, happy to take hits when its deserved. My dad said the same but I'm too curious and properly wanna learn! Okay, I'll top up the fluid then bleed the front right and see how it goes, if not I'll bleed the rest beginning from rear left and if that doesn't work I'll prepare to take out a loan haha. The key is a bit more research and then also taking a bit more time, it's easy for something to go wrong when you are new to things (the pushing out of the pistons!) and then it to be compounded (the undoing of the wrong bolt). If you can bleed the brakes then the only risk area left (from what I can gather) is that unnecessary bolt removal and possible sealing issue. So that requires close monitoring and checking initially and over the coming days if you pedal and brakes end up feeling back to normal. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted July 8, 2016 Share Posted July 8, 2016 The key is a bit more research and then also taking a bit more time, it's easy for something to go wrong when you are new to things (the pushing out of the pistons!) and then it to be compounded (the undoing of the wrong bolt). Good advice. We all have to do things for the first time, although I wouldn't recommend brake work until you've got some basics under your belt. Before starting a job like this, I strongly suggest hitting the Search button hard on forums such as this, until you have a clear picture in your mind as to the steps. There can be hidden pitfalls which only become apparent with research or experience, like not doing the bleed nipple up too tight: on some calipers (not so much yours I think), it can crack the caliper casing, and then the caliper is fit for the bin only. Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 8, 2016 Share Posted July 8, 2016 So.......er........how's it going!! Quote Link to comment Share on other sites More sharing options...
salaar Posted July 8, 2016 Author Share Posted July 8, 2016 Boys, happy to report its all good! Bled the calipers and its braking it how it was before. No pulling on each side either and the car runs true. Can't thank you guys enough and proud to be a member of mkivsupra.net Hopefully when I break something else, others are just as helpful haha. Quote Link to comment Share on other sites More sharing options...
K22SUP Posted July 8, 2016 Share Posted July 8, 2016 Your a lucky guy lol Quote Link to comment Share on other sites More sharing options...
Annabella Posted July 8, 2016 Share Posted July 8, 2016 Glad you've sorted it, bet it was a stressful 24 hours Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted July 9, 2016 Share Posted July 9, 2016 To answer your question about why the other brakes didn't work when you'd only touched one, it's because air was introduced to the system. With hydraulics you need the whole system to be full of fluid as when you operate it (in this case by pressing the brake pedal) the fluid is 'pushed' at one end of the line and as it compresses at a constant rate, it moves whatever is at the other end of the line (in this case, the pads). If you have air in the system, it creates a break in the system and all the pressure will naturally divert to that area as it's the easiest path of movement. Think about it a bit like the guy pushing long lines of trollies round the supermarket car park; if all the trollies are tightly packed, when he pushes the back end, the front moves. If there is a gap between 2 trollies, when he pushes the back end that gap has to be filled first before the front moves. With hydraulics being a sealed system, as soon as you release the pedal, the fluid expands to its original state (rather than being compressed by the pedal) and forces the pedal back to its original position. Master cylinders and slave cylinders are a way of amplifying the pedal effort to either increase brake pressure or reduce pedal effort to achieve the same pressure. Quote Link to comment Share on other sites More sharing options...
salaar Posted July 9, 2016 Author Share Posted July 9, 2016 Glad you've sorted it, bet it was a stressful 24 hours I did do when I woke up and saw some dark yellowy liquid on the rim! Thought the caliper was leaking so looked around the others and found no leak, then I came back to inspect the fluid...luckily it was just water with a tint due to the rim! Quote Link to comment Share on other sites More sharing options...
salaar Posted July 9, 2016 Author Share Posted July 9, 2016 To answer your question about why the other brakes didn't work when you'd only touched one, it's because air was introduced to the system. With hydraulics you need the whole system to be full of fluid as when you operate it (in this case by pressing the brake pedal) the fluid is 'pushed' at one end of the line and as it compresses at a constant rate, it moves whatever is at the other end of the line (in this case, the pads). If you have air in the system, it creates a break in the system and all the pressure will naturally divert to that area as it's the easiest path of movement. Think about it a bit like the guy pushing long lines of trollies round the supermarket car park; if all the trollies are tightly packed, when he pushes the back end, the front moves. If there is a gap between 2 trollies, when he pushes the back end that gap has to be filled first before the front moves. With hydraulics being a sealed system, as soon as you release the pedal, the fluid expands to its original state (rather than being compressed by the pedal) and forces the pedal back to its original position. Master cylinders and slave cylinders are a way of amplifying the pedal effort to either increase brake pressure or reduce pedal effort to achieve the same pressure. /QUOTE] Thanks a lot for that explanation, I understand the science behind aspects of engineering (always learning more) its just different when you actually do it and sometimes theory isn't the same as reality. I feel like most people on here work in mechanics you guys have so much knowledge and experience! Or have you just learnt over the years? Appreciate everyone's kind and honest help - keep it up! - - - Updated - - - Your a lucky guy lol I think I must be Irish Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 9, 2016 Share Posted July 9, 2016 Just be super sensitive for the next few weeks, lots of visual checks of the caliper and reservoir just to be sure Well done with sticking with it and taking the advise, just research and slightly more methodical next time. Quote Link to comment Share on other sites More sharing options...
salaar Posted July 9, 2016 Author Share Posted July 9, 2016 Just be super sensitive for the next few weeks, lots of visual checks of the caliper and reservoir just to be sure Well done with sticking with it and taking the advise, just research and slightly more methodical next time. Yes boss Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted July 9, 2016 Share Posted July 9, 2016 I've just learnt over the years mate so stick with it! First job I ever did was brake pads too and that was only 8 years ago! Not the best in the world on the spanners but I'll tackle most jobs now and can comfortably take an engine out of a supra and strip the whole thing down. Main things I've learnt is take my time, don't rush and you can't beat having the right tools for the job! Quote Link to comment Share on other sites More sharing options...
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