I recently changed the brake master cyliner in my 82 240d. I bench bled it before putting it in. I then tried to bleed the brakes at each wheel with an assistant pumping the pedal.

The problem is that no fluid comes out of the nipples at all! I'm thinking
1. I bench bled the master cylinder wrong and that air is in there somewhere. Moreover, when the pedal is pushed, the air is simply compressed?
2. There is major blockage in the nipples.

It is worthy to note that the fluid was really old and dark when i emptied the old reservoir. What should I do?

rodsob

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$500 1982 240d owner "Gunter"
125k miles,4 speed manual
crank windows, MB Tex, all original
no a/c, daily driver
Scorecard so far....
$230 Maaco paint job
$27 dimmer switch, $40 shutoff valve, $45 brake MC, $260 calipers, $40 brake hoses, $40 side fender trim, $20 balancing, $109 lifetime alignment, $10 fuel return lines, $115 oil&fuel filters for next 30k miles

i would remove each bleed nipple and clean them, reinstall and try to bleed again, i have seen these plugged with rust.........

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Gretchen 1981 240D 4-spd 213,000 mi
1979 240D 4-spd 298,000 mi parts car

1994 BMW 325is
1991 Dodge turbo diesel
1997 ford expedition

BILL

Are the brakes working? If you bench bled the master, theoretically you shouldn't need to bleed anything else. However, I second cleaning out the nipples.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Are you bleeding the rear calipers? If so make sure there's fluid in the rear reservoir by filling the master cylinder with as much fluid as it'll take and keeping the fluid level close to that while bleeding. The way the master cylinder is designed is that you need to fill it up all the way to the top to make the fluid overflow to the rear reservoir.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

I'll second that. The opening to the rear reservoir on mine is a teeny tiny hole where the body of the reservoir joins the neck. You have to have fluid all the way up into the neck to get it to the back.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
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