(88) Brake Booster Valve
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Safety Car
Joined: Jul 2004
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(88) Brake Booster Valve
Greetings,
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
Thread Starter
Safety Car
Joined: Jul 2004
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Likes: 30
Originally Posted by Da Mail Man
Greetings,
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
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Originally Posted by Da Mail Man
Greetings,
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
I've an 88, brakes are not what they should be as my
"foreign (gasp!)" car blows it away for braking, rotors checked and are fine, new stock pads all the way around, entire brake system flushed, replaced master cylinder, no vacuum leaks in/at brake booster or anywhere in car, abs self test appears ok...........,yet my brakes are not grabbing like the 4-cylinder car mentioned above.
was going to replace vacuum brake booster valve as routine maintenance but, noticed it is a bit hard to get out. i am afraid that if i bear done, i will damage the booster. so, how the heck do i get the brake booster vacuum check valve out?..twist?, pull at angle while twisting?.....ugh!.....thanks!
1) sand the roter surfaces (both sides) to remove the residue from the old pads? (use 130 to 180 grit paper and circular motion. Old residue can decrease the efficiency of new pads)
2) Properly bed in your new pads? Assuming you sanded off the old residue(if you didn't, you might want to do it) then you have to "bed in" the new pads. "bedding in" deposits some of the new pad material on the roters.
I like the Hawk brakes bedding in instructions
Do about ten stops from 35 mph to zero, keep rolling and allow about two minutes between stops...use moderate brake pressure (kind of glide to a stop), then do three hard stops from 50 to 55 mph. Get on the pedal hard.
Ride around for yen or fiften minutes and avoid using the brakes, let them cool down
Thereafter you should be fine
seeya
Instructor
Joined: Jul 2004
Posts: 110
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From: Decatur Al
Back to your original question, to get the booster check valve out you have to pull really hard! (at least that's the case on my '87)
I was trying to remove mine to check it and didn't want to tear it up! Someone on the forum said to yank on it really hard, so I did! I also rocked it back and forth and twisted it while pulling. It finally popped out. Pops back in a lot easier!
I was trying to remove mine to check it and didn't want to tear it up! Someone on the forum said to yank on it really hard, so I did! I also rocked it back and forth and twisted it while pulling. It finally popped out. Pops back in a lot easier!
Thread Starter
Safety Car
Joined: Jul 2004
Posts: 3,845
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Originally Posted by jackdaroofer
When you installed the new pads, did you
1) sand the roter surfaces (both sides) to remove the residue from the old pads? (use 130 to 180 grit paper and circular motion. Old residue can decrease the efficiency of new pads)
***no i did not. i wiped them down after a good cleaning***
2) Properly bed in your new pads? Assuming you sanded off the old residue(if you didn't, you might want to do it) then you have to "bed in" the new pads. "bedding in" deposits some of the new pad material on the roters.
***again, an embarrassed "no". i never had to do that on any previous vette or other car i owned and felt this was same***
I like the Hawk brakes bedding in instructions
Do about ten stops from 35 mph to zero, keep rolling and allow about two minutes between stops...use moderate brake pressure (kind of glide to a stop), then do three hard stops from 50 to 55 mph. Get on the pedal hard.
Ride around for yen or fiften minutes and avoid using the brakes, let them cool down
Thereafter you should be fine
***may give this a shot later in the week***
seeya
1) sand the roter surfaces (both sides) to remove the residue from the old pads? (use 130 to 180 grit paper and circular motion. Old residue can decrease the efficiency of new pads)
***no i did not. i wiped them down after a good cleaning***
2) Properly bed in your new pads? Assuming you sanded off the old residue(if you didn't, you might want to do it) then you have to "bed in" the new pads. "bedding in" deposits some of the new pad material on the roters.
***again, an embarrassed "no". i never had to do that on any previous vette or other car i owned and felt this was same***
I like the Hawk brakes bedding in instructions
Do about ten stops from 35 mph to zero, keep rolling and allow about two minutes between stops...use moderate brake pressure (kind of glide to a stop), then do three hard stops from 50 to 55 mph. Get on the pedal hard.
Ride around for yen or fiften minutes and avoid using the brakes, let them cool down
Thereafter you should be fine
***may give this a shot later in the week***
seeya
Thread Starter
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
Originally Posted by BamaVette87
Back to your original question, to get the booster check valve out you have to pull really hard! (at least that's the case on my '87)
I was trying to remove mine to check it and didn't want to tear it up! Someone on the forum said to yank on it really hard, so I did! I also rocked it back and forth and twisted it while pulling. It finally popped out. Pops back in a lot easier!
I was trying to remove mine to check it and didn't want to tear it up! Someone on the forum said to yank on it really hard, so I did! I also rocked it back and forth and twisted it while pulling. It finally popped out. Pops back in a lot easier!
