Question about 1988 Oldsmobile Delta 88

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Trouble Bleeding Break Line

Working on a 1977 Delta 88 Oldsmobile. Trying to bleed the break lines, possible air in the break lines. No leakage indicated, and the master break cylinder stays full, all except when bleeding of course. Now, when bleeding rear breaks first everything was going great. When I did the front passenger break it lost air presure, the break peddel went to the floor. I started over again, had an assistant pump the break peddel 5 times to build up presure, to push air out of the rear break line, nothing happened, no fluid, air bubbles, nothing.
Now, pumping break peddel, doesn't build presure, just goes to the floor when trying to bleed the break lines. What could have went wrong?

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  • Oldsmobile Master
  • 14,036 Answers

You need to hold in the metering valve.when you bleed the front brakes.long as the valve closed off you wont be able to bleed front brakes.better to get extra help.hard to bleed by your self .

Posted on Apr 20, 2009

  • Jonah Oneal Apr 20, 2009

    look at all brake lines from combination valve.to brake hoses on brake caliper and wheel cylinders.make the calipers and wheel cylinders are not leaking at seals.if you cant find no leaks problem in the master cylinder.

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Posted on Jan 02, 2017

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