35d Pressure Converters w/ 73k - Replace?

[captpilly]

Thanks for the feedback - seems like maybe this isn't as big of an issue of X5 vs 335D - I'm at 105k - no codes related to boost, car accelerates fine.

I have had to have my red boost hose connected 3 different times in 30k miles over the past year. Thinking that may have been my issue in the past.

[Stockx5]

Originally Posted by captpilly

Thanks for the feedback - seems like maybe this isn't as big of an issue of X5 vs 335D - I'm at 105k - no codes related to boost, car accelerates fine.

I have had to have my red boost hose connected 3 different times in 30k miles over the past year. Thinking that may have been my issue in the past.

On further study, the new pressure converters do not hold vacuum either. the only way to test them would be while the car is running and that would be very tricky as well.

I found that the vacuum reservoir has a very small leak. The reservoir connects to the pressure converters and affects overall vacuum in the system. so they converters might or might not be faulty.


I will report back once I remove the reservoir to see where it cracked.


Edit:
the pressure converters turned out to be fine. Vacuum reservoir has a leak, not noticeable on visual inspection.

[Deftronix]

Did a new vacuum reservoir fix the issue?

[Stockx5]

Originally Posted by Deftronix

Did a new vacuum reservoir fix the issue?

Yes it did.

[daytonatrbo]

Do you have a part number? I’m chasing an odd noise at shutdown and fluctuating brake pedal feel. I’m hoping it’s not the brake booster.

[Stockx5]

Originally Posted by daytonatrbo

Do you have a part number? I’m chasing an odd noise at shutdown and fluctuating brake pedal feel. I’m hoping it’s not the brake booster.

13627808456


This is a useful thread to diagnose your Vacuum system.

Turbo Control, Vacuum System, Pressure Converters etc.

[daytonatrbo]

Originally Posted by Stockx5

13627808456


This is a useful thread to diagnose your Vacuum system.

Turbo Control, Vacuum System, Pressure Converters etc.

That part number is coming up as a bracket, not a reservoir. Is the bracket that holds the pressure converters actually a reservoir?

[Stockx5]

Originally Posted by daytonatrbo

That part number is coming up as a bracket, not a reservoir. Is the bracket that holds the pressure converters actually a reservoir?

yup it's a bracket that is a reservoir that is a bracket.

to test it it's very simple just disconnect the vacuum lines going into it and apply vacuum with a vacuum pump and plug the other tube with your finger. no need to remove the entire piece.

even a minor leak can grow into a bigger leak when the car is vibrating and hot. if you are going to do any work there Id say replace it. and do the vacuum lines as well.



what are you applying vacuum with?

[Deftronix]

Thanks for the update and info

[daytonatrbo]

I plan to pick up a hand pump this week.

Upon shutdown I hear a distinct buzzing coming from under the intake manifold near where the VSV is for the motor mounts. Once the motor mounts VSV is de-energized, the buzzing rapidly dies down to nothing. And the brake pedal becomes hard much sooner Han expected. I’m thinking at the very least there’s an issue with the check valve at the booster.