Brake booster hissing after shut down
#1
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Brake booster hissing after shut down
1987 s4 tii. Brakes work well, but I notice a hissing when I turn off the vehicle. It is between the booster and master cylinder, where there shouldn’t be pressure. Where is a good place to get a replacement, or is an upgrade needed?
#4
Just make sure the check valve in the hose supplying the brake booster is installed and functioning correctly.
The OEM hose has the check valve built in and is not visible.
You might know this already but just putting it out there. A failed check valve will let air rush by it.
The OEM hose has the check valve built in and is not visible.
You might know this already but just putting it out there. A failed check valve will let air rush by it.
#5
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Just make sure the check valve in the hose supplying the brake booster is installed and functioning correctly.
The OEM hose has the check valve built in and is not visible.
You might know this already but just putting it out there. A failed check valve will let air rush by it.
The OEM hose has the check valve built in and is not visible.
You might know this already but just putting it out there. A failed check valve will let air rush by it.
#6
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I will check this. I know that if I spam the pedal, the rpm rises. I’ll get back to you on this
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