Question about 1986 Chevrolet S-10 Blazer

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1986 blazer power brake booster leaking on firewall inside the cab???

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You should replace the booster and master cylinder. With brake fluid there ,the diaphram in the booster will be damaged .

Posted on Apr 23, 2010

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How to fix brake booster " ?"


You will need to replace the booster. Unbolt the master cylinder from the front of the booster under the hood, then go inside of the cab and under the dash unhook the actuator rod from the brake pedal and remove the 4 nuts that hold the booster to the firewall. Then make sure to unplug the vacuum line from the booster under the hood and pull the master cylinder off of the booster being careful not to kink the brake lines. The booster should come right off.

Sep 03, 2014 | 1988 Ford F 150

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2000 chevy blazer power brake booster replacement


unbolt the nuts holding the master cylinder to the power brake booster and move it gently to one side without undoing the brake lines. next unbolt the bolts holding the booster to the firewall and vacume line and remove. install in reverse order.

Jun 09, 2014 | Chevrolet Blazer Cars & Trucks

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Brake booster replacement for 96 s10 blazer


tow lines off master cylinder detach the power brake booster from the firewall remove four nuts uper right nut hard to get to

Oct 15, 2009 | 1996 Chevrolet Blazer

1 Answer

I have excessive brake travel, and a hard time 98 chevy blazer


Two issues...
The brake booster has a ruptured diaphragm. Replace the booster.
It is located under the hood between the brake master cylinder and the firewall.

Your master cylinder may be leaking fluid internally past the plunger.
Have it examined when you change the booster.

Oct 12, 2009 | 1998 Chevrolet Blazer

5 Answers

When I step on pedal I get a vacuum leak sound under the dash.Have to push real hard on pedal for brakes to work. I'm not sure where all the air assist parts are. Is there a hose that might have cracked or...


the vacuum operated power brake booster is leaking, replace it, four bolts on the inside of firewall plus two to take the master cylinder loose..

Sep 09, 2009 | 1997 Chevrolet K1500

1 Answer

BRAKE AIR LOSS


Likely your power booster is leaking vacuum. If so it needs to be replaced. Noise is under dash near where the brake pedal rod goes into the firewall?

Apr 02, 2009 | 1999 Jeep Cherokee 4WD

1 Answer

97 Blazer brake pedal making hissing sound


Sounds like a vacume leak from power break booster, when you loose vacume it will stall out the engine if enought vacume is lost. chk. power break booster. and hose from engine leading to booster for vacume leak, booster is under hood, break master cyl. bolts to it.

Feb 21, 2009 | 1997 Chevrolet Blazer

2 Answers

19984 F150 Hissing Brakes


This noise is the seal for the power brake booster leaking, you will have to replace the vacuum booster to fix it.

Nov 12, 2008 | 1984 Ford F 150

1 Answer

2003 dodge dakota


check 2 things first one is their is a plastic check valve that is inserted into the booster (under your hood) then goes to a vaccum line ,then to the engine, pull it out of the booster and check the valve it should be L - shaped. it might have a hole in it causing a vaccum leak. be carefull pulling it out not to break it just pull straight out. if that is ok put it back in. then your problem is going to be the brake booster the big black round case. sometimes the diaphram inside the booster rips causing a vaccum leak which causes a hard brake pedal and you have to stand on the pedal to stop. then you will have to repace the whole thing but not the master cylnder unbolt master cylder with the brake lines connected, the lines will give then disconnect brake pedal arm under dash inside of trk their should be 2 nuts or 4 buts under dash on inside of firewall near brake pedal then remove booster pulls out from under hood. there is not much to replacing them.

Sep 24, 2008 | 2003 Dodge Dakota Club Cab

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