C220 w204 brake pipe.

[Bellow]

Thanks bellow.

A guy that owns his own garage doing mechanics as living, came down the other evening, he said he stays away from mercs & that he & another place said brake bleeding on them can be a nitemare.
1st ever for me.

I see a few using vacuum bleeding.

So got me thinking (a few minutes ago actually), if I put my pressure bleeder on resovour.. Then went to wheel 1, (using rag), open nipple, connect my syringe tool (as above), then pressure.up to 20psi on pump. Then went to my open nipple with syringe on & slowly sucked the fluid as well.

This could do it yes.?
Would act as vacuum.?

Thanks

I don't like the idea of vacuum bleeding because the seals in braking systems are designed to seal against pressure not vacuum. Sucking air in past them isn't conducive to the objective.
Bleeding can be downright awkward. My Chevy doesn't respond to pressure bleeding only the pedal method and if the rear line has been drained the open bleed valve and stroke pedal a few times method is required to get the fluid moving.

 

[whitefang]

Good evening bellow / all.
Sorry only just replying now at this time of night.
Yes bellow, we have fluid from all 4 calipers, but without much pressure I'm told, I'm doing the pedal pushing.
& same if we use the pressure tank bleeder at 20 psi, there's fluid but not with much pressure.

 

[whitefang]

Sent last reply before I finished...

But, yes, why are or why can they be awkward to bleed sometimes.?
All the other cars that me & dad have done have been...work clothes on, job done, work clothes off , clean up. 1hr.

Well, have a good weekend folk.
Talk to you later.

Thanks for the info & help.

 

[Bellow]

Good evening bellow / all.
Sorry only just replying now at this time of night.
Yes bellow, we have fluid from all 4 calipers, but without much pressure I'm told, I'm doing the pedal pushing.
& same if we use the pressure tank bleeder at 20 psi, there's fluid but not with much pressure.

Air will rob/disguise pressure as it is compressible. A better gauge is to delay opening the bleeder valve until the pedal has been depressed.

 

[Bellow]

Sent last reply before I finished...

But, yes, why are or why can they be awkward to bleed sometimes.?
All the other cars that me & dad have done have been...work clothes on, job done, work clothes off , clean up. 1hr.

I don't know! In the case of mine with a live rear axle I think the high point in the lines (above the axle) contribute to the problem as it robs the height differential relative to the MC. The fronts will bleed by gravity alone. Also, the plumbing with ABS is much more convoluted than without - doesn't help.

 

[whitefang]

Hi ...good evening all.
Hope your weekend is going well.

Today (9..11..24) I got down to the sisters place about 10.30, got my dirty clothes - rear jacked up - wheels off - my pressure pump filled primed & connected to resovour, I got my self wooden brum stick (a bit of 1) wrapped it in clean cloth.

Got my Sealy syringe (as above). Pressure'd the pump to 15psi, so dot4 doesn't flow out but dribbling, I removed the bleed nipple, I put new clean rubber washers on the nipple then re put in the nipple & tighted it so dot4 can still come out, but only the nipple & no were else.
I put my syringe onto the nipple, pressure the pump to 20 - 25psi (with dot4 in there), then pulled open the syringe. So basically I'm pumping / pushing & sucking / pulling at same time, I also gave the master cylinder & the pipes & the abs unit a tap (nothing hard) with the wooden broom stick (to help move any stuck bubbles).& Guess what.....
A big bubble on the driver rear, followed by a nice few little gassy bubbles.
Did same to all wheels in turn.
Then did the foot down open nipple, foot off close nipple X4 - 5 times on each wheel.
Now I have peddle as day I buy car.
Worked clean but still washed car & calipers.

I hope this helps someone out there.
What a nightmare...
I thought of the above idea yesterday.
It had to work...pushing & pulling at the same time , tapping on the air lock may of helped.. but it had to bleed ...yes.

Folk thanks for your help & info

Hope my way of working as given idea to someone else or works for someone else
I nearly had tear of joy ...at last kind of thing.

Have a flipping great weekend you all.

Thanks again...& Please drive safe.

 

[whitefang]

Hi, good morning all.

Just out of curiosity... I can't remember if I've already asked / mentioned...
I got the foxwell nt630 plus.
Thinking it would bleed abs unit.
When I plugged it in the other time, there was nothing..no function on the the tool allowing / asking me to do anything with bleed, there was something to do with esp but can't recall what it was.
Would star be of any use or does my car just not have this program / function / or ability or need obd tools to bleed air lock / new unit from the asr / abs unit.

Thanks again, like I say just curious.

Thanks all.