91 Isuzu brakes and bleeding

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t501
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Joined: Fri Jul 03, 2009 7:19 pm

91 Isuzu brakes and bleeding

Postby t501 » Sat Jul 04, 2009 3:45 pm

Isuzu '91 2.6

Recently the brake pedal has started to go soft and now sitting at a stop sign, the pedal slowly goes pretty much to the floor. A little pumping gets it back for a few moments.

I have series of questions;
1) I have a motive pressure bleeder that I used to bleed the brakes today. I saw only a couple small bubbles of air and the ugly old brown brake fluid is now at least all nice and clear. But there is little or no difference in the pedal.
I did start and run the engine each time as I bled each brake. Was there a proper order to bleed the brakes? I bled the rears first and the fronts last going counterclockwise.

I assume the next step is replacing the master cylinder?

Any opinions are appreciated.

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moondoggie98
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Location: St. Petersburg, Fla

Re: 91 Isuzu brakes and bleeding

Postby moondoggie98 » Sat Jul 04, 2009 4:30 pm

SOUNDS LIKE THE MASTER TO ME, I JUST REPLACED IT ON MY '88 DUE TO THE TRUCK SITTING IN STORAGE.
START BLEEDING THE MASTER FIRST, THEN THE LR, RR,RF, THEN LF
THEN DO IT ALL OVER AGAIN, MAKE SURE YOU BLEED ATLEAST 4oz PER WHEEL AT REAR , IT'S A LONG WAY BACK THERE
" IT'S NOT WHAT YOU DRIVE, BUT HOW "


'88 4x2 Std. Cab 2.6L, CARB, DAILY DRIVER, 276K "TEST MULE"

http://embracethis.co.uk/

"You don't stop laughing when you get old,
You get old when you stop laughing!!"

t501
Regular Member
Posts: 2
Joined: Fri Jul 03, 2009 7:19 pm

Re: 91 Isuzu brakes and bleeding

Postby t501 » Sat Jul 04, 2009 7:53 pm

Maybe I should bleed the old master first... any trick to it?

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moondoggie98
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Posts: 1217
Joined: Wed Dec 26, 2007 1:13 pm
Location: St. Petersburg, Fla

Re: 91 Isuzu brakes and bleeding

Postby moondoggie98 » Sat Jul 04, 2009 9:42 pm

WHEN YOUR PEDEL "FADES" TO THE FLOOR,[A little pumping gets it back for a few moments.] FLUID IS GOING SOMEWHERE. IT MAY BE A LOSS OF FLUID TO THE GROUND, LOSS IN MASTER DUE TO BAD SEALS (NO NEED TO REFILL, JUST PUMP), OR IT COULD BE SUCKED INTO THE BOOSTER AND NOT SHOW ANY WHERE(JUST NEED TO REFILL)
THE RULE I LEARNED EARLY IN LIFE ALMOST DEATH :!:

"IT'S NOT HOW FAST YOU CAN GO -BUT HOW FAST YOU CAN STOP"

I HOPE YOU CAN FIX YOUR BRAKES CORRECTLY
"START BLEEDING THE MASTER FIRST, THEN THE LR, RR,RF, THEN LF
THEN DO IT ALL OVER AGAIN, MAKE SURE YOU BLEED ATLEAST 4oz PER WHEEL AT REAR , IT'S A LONG WAY BACK THERE'

BEEPER
43 YEARS WITH GREASE UNDER MY FINGER NAILS ! :lol:

BTW: WHEN YOU REPLACE THE MC, YOU MAY NEED TO READJUST THE LENTH OF THE PUSH ROD THAT IS BETWEEN THE BOOSTER AND THE MC, IF IT IS TOO LONG YOU WILL HAVE A VERY HARD TIME GETTING YOUR BRAKES TO BALANCE OUT FRONT TO REAR. :oops:
TOO SHORT AND YOU WONT HAVE ENOUGH PEDEL TO STOP
" IT'S NOT WHAT YOU DRIVE, BUT HOW "


'88 4x2 Std. Cab 2.6L, CARB, DAILY DRIVER, 276K "TEST MULE"

http://embracethis.co.uk/

"You don't stop laughing when you get old,
You get old when you stop laughing!!"


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