Brakes feel squishy after service

[PWMDMD]

The brakes have been bled, and everything is back to normal.

What's interesting is that I think my front differential may not have been quite right from the day I bought the truck. Even when it was new, there was a very mild but constant harmonic vibration in the steering wheel while driving in 2WD. I didn't really notice it until I engaged 4WD and realized the vibration disappeared. As soon as I switched back to 2WD, it returned.

I eventually brought it in because, over the past few months, engaging 4WD began producing a new rhythmic vibration, and the original 2WD vibration became more pronounced instead of smoothing out.

With the new front differential installed, the truck is noticeably smoother in both 2WD and 4WD.

 

[The Critic]

They probably disconnected a brake line as some point during the repairs. Instead of using a pressure bleeder or grabbing another person, they hooked up their infamous vacuum bleeder and allowed it to run for 10-15 seconds and called it good. Not only do pneumatic vacuum bleeders do a terrible job of removing air, they generally leave air behind:

https://bobistheoilguy.com/forums/d...ake-fluid-exchange.167847/#convMessage-496796

 

[PWMDMD]

They probably disconnected a brake line as some point during the repairs. Instead of using a pressure bleeder or grabbing another person, they hooked up their infamous vacuum bleeder and allowed it to run for 10-15 seconds and called it good. Not only do pneumatic vacuum bleeders do a terrible job of removing air, they generally leave air behind:

https://bobistheoilguy.com/forums/d...ake-fluid-exchange.167847/#convMessage-496796

I'm just glad she's back in my possession and running better than she ever has!

 

[Huskyguy68]

I had mine flushed and bled on my 06 Nissan two years ago.
I had read it is a good idea to do both as brake fluid in the system naturally degrades with time, gets moisture in the lines.
Eventially can lead to corroded brake lines, poor braking performance.
But i have spoken to others, who say they never do a brake flush, same old brake fluid, top up as needed.

 

[PWMDMD]

I had mine flushed and bled on my 06 Nissan two years ago.
I had read it is a good idea to do both as brake fluid in the system naturally degrades with time, gets moisture in the lines.
Eventially can lead to corroded brake lines, poor braking performance.
But i have spoken to others, who say they never do a brake flush, same old brake fluid, top up as needed.

I always have them change out the brake fluid when ever the brakes are done.

 

[JD!]

They probably disconnected a brake line as some point during the repairs. Instead of using a pressure bleeder or grabbing another person, they hooked up their infamous vacuum bleeder and allowed it to run for 10-15 seconds and called it good. Not only do pneumatic vacuum bleeders do a terrible job of removing air, they generally leave air behind:

https://bobistheoilguy.com/forums/d...ake-fluid-exchange.167847/#convMessage-496796

Good to know that the vacuum bleeders are no good. I threw a junkyard ABS pump/module into my 335i yesterday and although I did run the ABS bleed plan, I used my vacuum bleeder to get the bulk of the fluid through. Made quick work of the job but the pedal is probably about 10% less firm than before. I'll give it another go with the pop bottle and hose method

 

[The Critic]

Good to know that the vacuum bleeders are no good. I threw a junkyard ABS pump/module into my 335i yesterday and although I did run the ABS bleed plan, I used my vacuum bleeder to get the bulk of the fluid through. Made quick work of the job but the pedal is probably about 10% less firm than before. I'll give it another go with the pop bottle and hose method

A few pumps on each caliper with a helper should solve your problem.