Saintrey

Broke the brake booster vacuum line that goes to the 4-way vacuum connector. Is this repairable?

​​​​​Or better question is: Is this a critical part I need to repair soon? I was able to drive car with no issues but I wonder since I don't have an idea what it does that it might just bite me later and make things worse?

Any info would be appreciated. Thank you.

jetson8859

It's the first part on 928srus website. Can also be bought from the other vendors here, 928 International, 928 Specialists etc.

https://928srus.com/collections/brak...928-355-660-03

FredR

I had this problem a couple of years ago when I accidentally snapped off the passive vacuum connnector.

Not being one to take such things lying down I figured i could fix the thing. To do so I needed a steel ferrule of suitable diameter. I have a box in which I keep "useful bits and pieces". These are items that had a previous life, failed or were left over and rather than sling them I keep them "just in case". I used to have a radio controlled model based on a Porsche 959. The telescopic antenna snapped off the control module- figured it might be useful. I cut a 1 inch length of the steel tubing off the remnants, cut off the snapped connection at its base and drilled a hole in the body such that the antenna section was a tight push fit. I then mixed some two pack epoxy and built some reinforcement at the base to bind it.

I only intended it as a temporary affair- still there several years later.

slownrusty

Same thing recently happened to me, I just bought a new one from 928sR'Us

FredR

Assuming you have a flappy as in S4 or later you will lose the operation of this item leaving top end a bit flat [assuming it was working in the first place]. Also, the HVAC system will not dfunction correctly without the passive vacuum system.

Koenig-Specials 928

So you just pull out the old one and insert the new one?
That simple?

Mrmerlin

Before you do anything,
Order a 4 way rubber junction,
a booster check valve,
and a blue check valve.

.loosen the clamp on the hose and slide it away from the valve.
spray some PB blaster at the booster rubber so it goes where the valve is, this will help it to slide out of the grommet
gently pull the hose away from the booster the valve will come free of the grommet.
put a thin screwdriver into the end of the hose and work it into the hose spray some PB onto the screwdriver,
it will run down the screwdriver into the hose to help pull the valve from the hose.
NOTE you may have to use a heat gun to heat the hose and pull the valve from the hose.
Once the valve is free
put some DC111 on the new check valve barbs and install it into the hose, slide the clamp back and tighten it
then put some DC111 on the barbs where it will seat to the booster insert the valve to the booster,
NOTE make sure the port is facing up before you tighten the clamp.
replace the 4 way junction under the blue check valve,
insert the new blue check valve and HVAC line and reservoir line into the 4 way,
then there is one leg not used it should have a plug in this is a test port

Koenig-Specials 928

Thank you Stan.
Much appreciated

gazfish

Consider yourself lucky you have LHD, you can't even see the port on RHD cars.