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Unread 12-21-2013, 01:46 PM   #1
Cashless45
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Brake booster question

Hey guys, I'm new to this forum and have a question. I have a Grand Cherokee Limited with the 4.7ltr V8. The brake booster needs to be replaced. Question. Can I get it out without having to remove the master cylinder?

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Unread 12-21-2013, 01:51 PM   #2
MadderThanMax
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Yes... but its more awkward than taking it out as one assembly and working with on a bench etc..
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Unread 12-21-2013, 05:19 PM   #3
Cashless45
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Not convinced

Well, after two hours, I'm not convinced it will come out. I took the vapor canister out to make room . Still not enough room with the master cylinder removed. How hard is too bleed the system from the master cylinder?
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Unread 12-21-2013, 05:29 PM   #4
Cashless45
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I'm still trying. Couple of questions. If I pull the air box can I move the whole master cylinder/ ABS module forward can the booster come out ? More details would be very helpful. Thanks again
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Unread 12-22-2013, 03:12 AM   #5
MadderThanMax
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Can you get some photos up please?
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Unread 12-22-2013, 04:07 AM   #6
alfaitalia
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Hey max......if they had the steering wheel on the correct side over there it would be an easy job. My MC is nowhere near my abs unit!

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Unread 12-22-2013, 04:52 AM   #7
MadderThanMax
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Only tryin' to Help D... done a few of them in the past...
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Unread 12-22-2013, 06:03 AM   #8
Darnice
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To the OP, what makes you think the booster is bad? Just curious.
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Unread 12-22-2013, 06:34 AM   #9
doityourselfMM
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It can be removed but you really have to rotate the master cylinder 90 degrees. A little man handling is required getting the brake booster out. Can you say twist and turn. The flex lines between the MC and the ABS HCU are what gives you the access. I did it several weeks ago. I didn't think I could get it out, but I did.

Removing the air box won't help. All the hard brake lines will remain in place even with the air box removed. Pulling the MC out all together will make the job very easy, but then you may need to bench bleed the MC, and bleed the entire brake system.

Do a search for brake booster. There are many threads.
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