HazenVagen
Active member
Well, its officially Spring, and my 2005 GLS Passat TDI is only ten days past her 2nd birthday (46k mi.), so it's time for a brake system flush. I've done the obligatory forums search and found that our Jetta brethren (and sistern? I crack myself up!) are the only ones that have posted on this subject at any substantive length. Their thread on the flush DYI leaves me with some unanswered questions that may be specific to our B5's, so I post here.
I've flushed several systems, including but not limited to, my wife's MkIII Jetta, my daughter's 2001 Subbie, and my old '91 300TE 4Matic Benzo. I use a SpeediBleeder. All of these rigs were equipped with ABS and it is my understanding that in order to properly flush an ABS equipped brake system one must use 32 PSI at the master cylinder; which I've done successfully with the aforementioned beasties.
The A4 flush thread makes mention of NOT using more than 14 PSI (though DieselDorf mentions using 18 PSI with no ill effects). What's up with that? My MB Service Library specifically notes the higher working pressure. Can the systems be THAT different?
Also, there seems to be some difference of opinion on the order of caliper bleed. I've always used RR, LR, RF, LF as a method, though the A4 thread mentions the exact opposite is to be used on newer ABS equipped models. Yikes! I feel a bit like Rip VanWinkle or Alice through the looking glass. Did my nap take a bit longer than I reckoned? Did I fall down a rabbit hole?
Can someone explain what it is I've missed? Thank you in advance for your patient understanding.
Best regards,
HazenVagen
I've flushed several systems, including but not limited to, my wife's MkIII Jetta, my daughter's 2001 Subbie, and my old '91 300TE 4Matic Benzo. I use a SpeediBleeder. All of these rigs were equipped with ABS and it is my understanding that in order to properly flush an ABS equipped brake system one must use 32 PSI at the master cylinder; which I've done successfully with the aforementioned beasties.
The A4 flush thread makes mention of NOT using more than 14 PSI (though DieselDorf mentions using 18 PSI with no ill effects). What's up with that? My MB Service Library specifically notes the higher working pressure. Can the systems be THAT different?
Also, there seems to be some difference of opinion on the order of caliper bleed. I've always used RR, LR, RF, LF as a method, though the A4 thread mentions the exact opposite is to be used on newer ABS equipped models. Yikes! I feel a bit like Rip VanWinkle or Alice through the looking glass. Did my nap take a bit longer than I reckoned? Did I fall down a rabbit hole?
Can someone explain what it is I've missed? Thank you in advance for your patient understanding.
Best regards,
HazenVagen