1988 Nissan Hardbody Brake Help?

[331TwistedWedge]

I need some fellow stangbangerz to help me out ... any brake gurus? ... my trouble is its a nissan, lol ... i have to pump my brakes to get my truck to stop ...

just replaced:

-master cylinder
-both front calipers
-rears are drums / so i have new wheel cylinders
-brake booster is fine, very easy to push
-everything has been bled
-and yes the fluid is full, lol ........

could i have an issue with the front brake lines ... when we re-bled the brakes i keep getting a lot of air in the passenger front ... could this be the rubber brake line collapsing? ... or do i have a proportionate valve issue ? :confused: ...

any input would be very helpful ... picture of the nissan is below ...

thanks,

Rick ............

[Black Horse]

Check your rubber brake lines

[331TwistedWedge]

Check your rubber brake lines

anyway of checking those, thats kind of where i thought the issue was ... if its only 15-20.00 bucks, then i can buy one and take a chance ... its driving me crazy ... it makes the brakes lock up on that passenger side when i have to stop fast ... at least i got it narrowed down to 1 of the 4 brakes ...

[Black Horse]

I would change both front hoses.

[mustangboy]

If the front brake is locking up most likely it is a collapsing hose. Like Dave said replace both!!

[331TwistedWedge]

If the front brake is locking up most likely it is a collapsing hose. Like Dave said replace both!!

thanks you guys, i appreciate it ... i have replaced this entire brake system, little by little and my troubles were probably these damn rubber brake lines :confused: i will change them both this week, thanks again ........ i will let you know if your diagnoses were correct :bigthumb

[331TwistedWedge]

ok installed both new rubber brake lines yesterday and bled the brakes ... still have the same issue ... any other ideas? ... this is frustrating, i feel like i have a new brake system - wtf could it be ...

thanks for any help, *again* ...

rick .......

[mustang8998]

Did you "bench bleed" the new mastercylinder, before installing it?

Thats the only thing I can think of, with everything being new.

[331TwistedWedge]

Did you "bench bleed" the new mastercylinder, before installing it?

Thats the only thing I can think of, with everything being new.

yes we bled the master cylinder as well ... i have never ran into so much trouble ... i just pump my brakes once then stop, i guess i have to live with it ...

[87poopcoupe]

easy way to check where problem is !

line lock all 4 wheels , vicegrip on all 4 rubber lines... take them off one at a time and see when pedal goes to crap !

if the lines are not the problem then it is in master !

[331TwistedWedge]

easy way to check where problem is !

line lock all 4 wheels , vicegrip on all 4 rubber lines... take them off one at a time and see when pedal goes to crap !

if the lines are not the problem then it is in master !

ok simple enough ... the master cylinder is new, matter of fact the old master cylinder was good too - because im having still having this issue lol ... thanks i will try the method you mentioned ...

[zombis]

it could be possible that you got a defective master cylinder. the people assembling them are probably smokin crack anyways