Brake Booster Leak - Defender Source
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  #1  
Old April 8th, 2013, 11:58 AM
jijalicious
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Jiman Khosravan
'94 D90
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Join Date: May 2010
Location: Rockville, MD, USA
Posts: 138
Brake Booster Leak

Have had this problem for a few weeks now.... I know I know.. Should've taken care of this sooner...

Had the brake booster replaced a few months ago....

Braking power was different afterwards but didn't think anything of it.. but it finally became very difficult to brake.... did some research on the forum and everyone mentioned old booster and or vacuum...

So I checked for leaks and sure is... circle marks the spot... Its wet because that's how I tested it.. sprayed water on it and it bubbled...

I removed the cylinder from the booster... and reattached it... no change.

It's metal on metal... should there be a ring or seal there?

The 3 bolts that connect to the booster are pretty tight... any tighter and I risk damaging threads.

Any ideas?

Thanks

~Jiman
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  #2  
Old April 8th, 2013, 12:22 PM
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Gren_T
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Gren Thomas
1985 90 300tdi auto
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Join Date: Feb 2005
Location: bridgend, wales , UK
Posts: 413
Hi, the boosters are known to crack around the mounting flange, get someone to depress the brake pedal while you watch the flange area around the bolts for movement.
btw by depress I mean push down, not tell it that its useless, overweight & it's best years are behind it.

no gaskets shown in the parts book:
http://www.retroanaconda.com/landrov...t_p581-718.pdf

regards

Gren
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  #3  
Old April 8th, 2013, 01:56 PM
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Red90
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John B.
1991 Defender 90, 200TDI
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Assuming it is like other boosters, there should be a shaft seal on the push rod, so there should not be vacuum at that flange.

http://www.corvette-restoration.com/...ic_2_large.jpg
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  #4  
Old July 3rd, 2013, 04:30 PM
jijalicious
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Jiman Khosravan
'94 D90
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Join Date: May 2010
Location: Rockville, MD, USA
Posts: 138
So it was a little o-ring seal thingimabob...

Trevor sent me one and let me just say...I now have so much breaking power I don't know what to do with it!

~Jiman
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