Chevy truck brakes help?

J

JAMBEANO

New member
1979 chevy truck. 2 wheel drive. disc brakes up front, dum brakes in the rear. The brakes are squishy. I bled the brake lines. I changed the master cylinder. I bench bled the master cylinder. I bled the lines again. There was no puddle around the tires to signify a leak. I didn't change out the push rod, because they are not the same. When I press the brake, I can hear a squish noise. I can't remember if I could always hear this or not. The seal or ring that goes around the the tip of the push rod, where it meets the master cylinder, looks beat up. What could be the problem? Please list all the problems that it could be, so I can do trial and error.

Also, I don't know if I was doing something wrong, but I recently bled the lines, the left side sprayed when I bled it, while the right side just poured out, like there was no pressure behind it. I am just trying to give all the details I can that I noticed. I am not a mechanic, but I can get the job done with some guidance. Thank you.
The squishy noise is not the problem. The brakes are still squishy and not working. Sorry for misleading.
 
HI
Unless you had a pressurized system it take two people to bleed brakes.. one to pump and hold the pedal while the other one bleeds the wheel cylinder... It sounds like there is still air in the master cylinder.. A squishy feeling is air and air don't pressurize like the fluid does..
the one in the car holds perisher on the pedal while the other one opens the bleeder and when the pedal reaches the floor he hollers to the guy under the car and he closes the bleeder before the one inside lets go of the pedal or you well suck air back into the cylinder.
good luck
tim
 
The problem with fixing those old trucks is that everything is old & worn out. Parts wear together & then u put on a new part & it doesnt fit quite right. Then u end up replacing more parts & so on. Im not saying for sure, but that sort of thing has happened to me on my old trucks. Fix the problem & create a new one. Heres what Id say to do. If the fluid isnt leaking, & the brakes are working just fine, then keep an eye on it & if nothing changes in the next week then ignore the noise. Old trucks make weird noises.
 
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