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  #1  
Old 05-18-2007, 09:07 PM
dieseldan44's Avatar
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Question W123 Brake Booster R&R

After testing my brake booster and replacing the o-ring seal, it still leaks. According to info here, this means I need a new booster...

(Original thread)
Hissing from brake booster?

What's a good source for a rebuild? Is there a 'CVJ Axles' of rebuilt boosters?

How much time should I count on for this one?

Thanks,
dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
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Old 05-19-2007, 02:28 AM
toomany MBZ's Avatar
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You can test by evacuating the booster, and "see" if you still have a problem there. They are VERY expensive, so make sure you need one before replacing. I have a used one that works.
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Old 05-19-2007, 09:41 AM
dieseldan44's Avatar
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Im fairly certain I need one.

Under normal operation after the car shuts down I can hear hssing coming from insdide the boost - the air rushing in.

I crafted an adapter out of my old hard vacuum line to connect the booster to the mityvac. Leaks about a mmHg every 5 seconds, and I cant even pump it up past 5.

Any other tests I can do to verify? I am sure my test system is airtight.

dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
Reply With Quote
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