BlueTR3A-5EKT Posted December 10, 2024 Report Share Posted December 10, 2024 (edited) As the title says. Am intending to drain and flush an hydraulic system that has had the wrong fluid put in it. Mixed Dot 5.1 with Dot 5 New seal kits in all components obviously once the system is drained but how to ensure all the fluid is cleaned through. Pump brake cleaner liquid through it perhaps? Where to start draining from? Refill and bleeding will be after the system is drained and cleaned through. How good are the pressure bleeder kits? The one I had years ago blew brake fluid all over my underbonnet area. Any recommendations for which kit to use.? Edited December 10, 2024 by BlueTR3A-5EKT Quote Link to post Share on other sites
Ian Vincent Posted December 10, 2024 Report Share Posted December 10, 2024 19 minutes ago, BlueTR3A-5EKT said: As the title says. Am intending to drain and flush an hydraulic system that has had the wrong fluid put in it. Mixed Dot 5.1 with Dot 5 New seal kits in all components obviously once the system is drained but how to ensure all the fluid is cleaned through. Pump brake cleaner liquid through it perhaps? Where to start draining from? Refill and bleeding will be after the system is drained and cleaned through. How good are the pressure bleeder kits? The one I had years ago blew brake fluid all over my underbonnet area. Any recommendations for which kit to use.? I have an Ezi-bleed kit and like you, the last time I used it I sprayed fluid all over the under bonnet area. Rgds Ian Quote Link to post Share on other sites
Trev Good Posted December 10, 2024 Report Share Posted December 10, 2024 The better kits don't blow out, they suck into a large receptacle...such as Ian's suggested ezibleed which is also the one I use. I flushed out the Scimitar system when rebuilding it...I would suggest starting from the furthest point from the master cylinder and remember to keep topping up! Quote Link to post Share on other sites
BlueTR3A-5EKT Posted December 10, 2024 Author Report Share Posted December 10, 2024 So, that’s one NO for Eezibleed. The very kit I had that squirted a nice mist of brake fluid under the bonnet. Quote Link to post Share on other sites
Chris Hale Posted December 10, 2024 Report Share Posted December 10, 2024 (edited) Flush the system through before you take calliper's and wheel cylinders off to change seals. Then once you finished flushing then blow the system through with an air line. Regards bleeding I have had the same results as you with the pressure bleeders. Now use a vacuum bleeder with reasonable results Edited December 10, 2024 by Chris Hale Quote Link to post Share on other sites
Lebro Posted December 10, 2024 Report Share Posted December 10, 2024 I have also had explosive type problems with the ezybleed, but possibly because too higher pressure was being used. Bob Quote Link to post Share on other sites
BlueTR3A-5EKT Posted December 10, 2024 Author Report Share Posted December 10, 2024 Did you clean/flush through with brake cleaner? I have a gallon to hand. Quote Link to post Share on other sites
Charlie D Posted December 10, 2024 Report Share Posted December 10, 2024 Thinking about it logically, if you are going to replace all the seals it means that you will have to take out all the pistons in the MC, slave cylinders and calipers. Easy enough to decontaminate them while they are on the bench. Then all that is left are the pipes and cylinder bodies. Compressed air, and block up the cylinders one at a time until each one is free of fluid. Then maybe blow through some liquid to finish off the cleaning process. Maybe meths. My dad used to run a pub when I was a kid. (Old school stuff with "Beer engines". ) He used to put a small plug of sponge in the pipes and pump it from the barrel end to the pump end, then dismantle the pump and take it out. Maybe you could do something similar. Quote Link to post Share on other sites
harlequin Posted December 10, 2024 Report Share Posted December 10, 2024 53 minutes ago, BlueTR3A-5EKT said: Did you clean/flush through with brake cleaner? I have a gallon to hand. I used methylated spirit to flush the system. You can get a big tin of it from screwfix for not very much and then once flushed it can be used to light your bonfire George Quote Link to post Share on other sites
stuart Posted December 10, 2024 Report Share Posted December 10, 2024 Alec always used to recommend Meths to flush through as well. The vacuum bleed is a better bet as your not going to blast it everywhere then. Stuart. Quote Link to post Share on other sites
Nigel Triumph Posted December 10, 2024 Report Share Posted December 10, 2024 I've had the same problem with EasiBleed, blasting fluid around. These days I only use vacuum bleeding, and after trying several, MityVac works well for home use. Nigel Quote Link to post Share on other sites
john.r.davies Posted December 10, 2024 Report Share Posted December 10, 2024 While meths is a useful dilutant of brake fluid, useful for clearing up spills, it contains 5-6% Water. Not what you want inside the brake system. John Quote Link to post Share on other sites
PodOne Posted December 10, 2024 Report Share Posted December 10, 2024 (edited) Used Eazibleed quite a few times now with no issues just use it at 4-5 psi not the 10 in the info leaflets and wrap a few rags over it just in case. Andy Edited December 10, 2024 by PodOne need to revise the difference between Bar and psi! Quote Link to post Share on other sites
Ian Vincent Posted December 10, 2024 Report Share Posted December 10, 2024 1 hour ago, PodOne said: Used Eazibleed quite a few times now with no issues just use it at 4-5 bar not the 10 in the info leaflets and wrap a few rags over it just in case. Andy I suspect you don't mean 4 - 5 Bar, that would be circa 60 - 70 psi Rgds Ian Quote Link to post Share on other sites
RogerH Posted December 10, 2024 Report Share Posted December 10, 2024 8 minutes ago, Ian Vincent said: I suspect you don't mean 4 - 5 Bar, that would be circa 60 - 70 psi Rgds Ian .............go for it Quote Link to post Share on other sites
Ian Vincent Posted December 10, 2024 Report Share Posted December 10, 2024 10 minutes ago, RogerH said: .............go for it That certainly would give you a good spray of brake fluid! Rgds Ian Quote Link to post Share on other sites
RogerH Posted December 10, 2024 Report Share Posted December 10, 2024 Quote Link to post Share on other sites
PodOne Posted December 10, 2024 Report Share Posted December 10, 2024 Ok lads the drinks are on me! Post amended. Quote Link to post Share on other sites
iain Posted December 10, 2024 Report Share Posted December 10, 2024 I use Eazibleed, I have had an issue with leaks, but my kit came with a number of various reservoir lid adaptors……only one was correct, but at-least one other appeared to fit…….it didn’t when pressurised :-(. The one that fits doesn’t leak and works well although I have clothes everywhere just in case! Quote Link to post Share on other sites
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