90xj06
NAXJA Forum User
- Location
- Peabody, MA
I just swapped in a brand new WJ brake booster and master cylinder into my 88. The original single diaphragm had a hissing noise and I wanted to upgrade to something better than the suggestion of stopping.
Swap went well. I didn't use a spacer but peddle hight was fine. Used weather stripping to make sure no water would come in. Started up the jeep and the hissing noise is still present. With the original booster if I took the vacuum line off and plugged it the hissing went away. I can't imagine it's supposed to hiss at all. Sounds like it's coming from between the booster and master it changes sounds slightly when you wiggle the master.
Is there supposed to be a seal between the master and booster?
Swap went well. I didn't use a spacer but peddle hight was fine. Used weather stripping to make sure no water would come in. Started up the jeep and the hissing noise is still present. With the original booster if I took the vacuum line off and plugged it the hissing went away. I can't imagine it's supposed to hiss at all. Sounds like it's coming from between the booster and master it changes sounds slightly when you wiggle the master.
Is there supposed to be a seal between the master and booster?