Brake Bleeding Question ?

[Joeb_444]

Hi,

We are using a sealey pressure bottle brake bleeder and at present are at the just compressed air stage. The system is pressurised to 10psi as per the sealey instructions and I have chased down every air leak I could find. Over a period of about 30 mins the system still loses about 1psi on the gauge and I have no idea where this air leak is from being so minor I cannot find it it could even be in the bleeder itself !

Stupid question for today is do I go ahead and fill with fluid and see if there is a weep or should I continue to try and find something which is probably not findable !!!

Advice appreciated thanks

Paul.

[GreigM]

most likely to be the bleeder, or bleeder connection to the fluid reservoir....1psi over 30mins wouldn't stop me getting the fluid in there...if there is a leak you'll find it quick enough.

[SteveD]

fill her up and bleed the system ,everything else is just pure guesswork until it has fluid in the system and bled

[Joeb_444]

many thanks !

[SootySport]

As the brake system is still dry, the seals are also dry and not sealing at there best, adding brake fluid lubes the rubber seals up properly. Go forth and fill &bleed.

[Blatman]

most likely to be the bleeder, or bleeder connection to the fluid reservoir....1psi over 30mins wouldn't stop me getting the fluid in there...if there is a leak you'll find it quick enough.

Yup.. Press the pedal with fluid in there and you'll be putting somewhere around 1000psi in to the system. If you have a leak, it'll be obvious...

[jonjh1964]

Paul,

How did you get on? After going around all the connections and checking for tightness, after a quick pressure test that found a leak in the eezibleed, I filled the master cylinder and the eezibleed bottle, pressurised to 20psi and started at the rear n/s (lowers then uppers), rear o/s, front n/s and the front o/s by which time the eezibleed bottle was near enough empty. Opening the bleed nipples too much seemed to introduce air bubbles so backed off. Finally pumped the pedal a couple of times (thought it sounded like some air may have got into the system?), chocked the brake pedal with a bar overnight and the next day pedal felt reasonably firm. I will rebleed using the one way valve (split hose) once the car is fully build. No leaks so far and it's been about a week (feels longer waiting for parts!!!)

Jon H

[Joeb_444]

Paul,

How did you get on? After going around all the connections and checking for tightness, after a quick pressure test that found a leak in the eezibleed, I filled the master cylinder and the eezibleed bottle, pressurised to 20psi and started at the rear n/s (lowers then uppers), rear o/s, front n/s and the front o/s by which time the eezibleed bottle was near enough empty. Opening the bleed nipples too much seemed to introduce air bubbles so backed off. Finally pumped the pedal a couple of times (thought it sounded like some air may have got into the system?), chocked the brake pedal with a bar overnight and the next day pedal felt reasonably firm. I will rebleed using the one way valve (split hose) once the car is fully build. No leaks so far and it's been about a week (feels longer waiting for parts!!!)

Jon H

Hi Jon, couldn't proceed because of a faulty hub and don't want to fill and bleed with pads wedged in caliper, waiting for a solution but may be dead before anything happens LOL ...

Patience is a virtue but I am not feeling very virtuous at the moment.

Best wishes to all

Paul.

[Norman Verona]

Joeb, you can bleed the brakes with the "faulty" hub if it's the front and the caliper can be slid off the disc without undoing the hydraulic pipe(s). As long as there is a set of pads in the caliper it will bleed OK.

As above, the eazibleed will not hold pressure so don't worry about the small loss.

I would suggest you get the brake system bled as soon as possible in case there is something faulty and you need replacement parts.

[Joeb_444]

Joeb, you can bleed the brakes with the "faulty" hub if it's the front and the caliper can be slid off the disc without undoing the hydraulic pipe(s). As long as there is a set of pads in the caliper it will bleed OK.

As above, the eazibleed will not hold pressure so don't worry about the small loss.

I would suggest you get the brake system bled as soon as possible in case there is something faulty and you need replacement parts.

Thanks Norman sorted today, getting a golden fleece is easier than missing parts from Westfield !