I have a 1988 chevy s10 with extreme air in the master cylinder

Asked by Feb 10, 2016 at 11:05 AM about the 1988 Chevrolet S-10 STD Standard Cab SB

Question type: General

I have replaced the master cylinder and a front brake line. I have bled all wheel lines, do not see any evidence of any leaks anywhere yet my master cylinder shows creamy brake fluid (air) with a very mushy brake peddle.  Please help

Manuel

6 Answers

75,455

Did you bench bleed the master cylinder before putting it on? A new master cylinder needs to be bench bled first.

1 of 1 people found this helpful.
Best Answer Mark helpful

yes I did very easy process

I might add that in bench bleeding the master cylinder, I was able to get all air out. in thinking that I might have a bad MC I removed it from the vehicle and manually bled it again with success. Put back in the truck and same thing air in the MC.Im thinking maybe a bad proportioning value.

75,455

Not for spongy breaks. If there is ABS system on there, the ABS may need to be hooked up to a computer/ scanner to run a program to bleed that out. You just can't do it like normal by opening the bleeder valves.

19,745

An 88 won't have abs. Nor should they be hard to bleed. I've bleed several trucks of that generation. 2 things, I have never seen creamy brake fluid unless it was contaminated, maybe i just havent seen one bad enough. Second tighten everything up and pump the shit out of the brakes then check the wheel cylinders and caliper for any moisture. And see which reservoir is getting low. Also I've wanted to place proportioning valve before and all of them were never bad. Idk if I've seen a bad one. Replaced more due to bad threads than actually bad

75,455

Andrew brought up a good point. Kinda over looked what you said here. Yes do what Andrew says about checking the wheel cylinders, check for leaks, But now I'm thinking that the break fluid is so contaminated that you cannot get a solid pedal. I would make sure all the break fluid has ben flushed out with new fluid.

Your Answer

S-10

Looking for a Used S-10 in your area?

CarGurus has 1,218 nationwide S-10 listings starting at $1,600.

ZIP:

Chevrolet S-10 Experts

  • #1
    Andrew Olsen
    Reputation
    2,510
  • #2
    John Saffrahn
    Reputation
    1,050
  • #3
    Trebor66
    Reputation
    1,030
View All

Related Models For Sale

Used Ford Ranger
170 Great Deals out of 5,446 listings starting at $1,250
Used Ford F-150
2,787 Great Deals out of 211,590 listings starting at $1,400
Used Dodge Dakota
97 Great Deals out of 3,601 listings starting at $1,200
Used GMC Sierra 1500
1,137 Great Deals out of 65,446 listings starting at $1,995
Used Chevrolet Blazer
3 Great Deals out of 944 listings starting at $950

Used Cars For Sale

2004 Chevrolet S-10 For Sale
4 Great Deals out of 50 listings starting at $2,750
2003 Chevrolet S-10 For Sale
7 Great Deals out of 288 listings starting at $1,600
2002 Chevrolet S-10 For Sale
195 listings starting at $2,450
2001 Chevrolet S-10 For Sale
169 listings starting at $1,995
2000 Chevrolet S-10 For Sale
177 listings starting at $3,299

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.