Brake Fluid Leak between Master Cylinder and Brake Booster - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 07-25-2018, 06:13 AM   #1 (permalink)
Deshet
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Brake Fluid Leak between Master Cylinder and Brake Booster

I have a seal leak between the brake booster and the master cylinder. I am trying to get the correct parts to fix it and I am confused. Seal kit...I don't know if the master cylinder will come with a seal, my master cylinder is actually good.

Advanced has the master cylinder for a decent price $130 before discounts.

The Duramax Powered Silverados have a kit to replace the leaking seal only.
https://boostautoparts.com/products/...nt=53381952263

There are a lot of videos showing the hydroboost repairs for silverados but I don't see anything for the C4500.

Is there a similar seal for the C4500? Mine is a 2008 6.6 with 230,000 miles

Please point me in the right direction to get this done.

Thanks

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Old 07-25-2018, 09:39 AM   #2 (permalink)
heymccall
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There is no "seal" or gasket between the brake master cylinder and the hydraulic booster.
Each unit is independently sealed, and, if fluid leaks from the booster output, or the cylinder input, it will exit between the two components.
Determine what type of fluid has leaked. That will determine which side you need to repair/ replace.

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Last edited by heymccall; 07-25-2018 at 09:41 AM.
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Old 07-25-2018, 03:16 PM   #3 (permalink)
Deshet
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I am leaking brake fluid.
Thanks,
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Old 07-25-2018, 04:52 PM   #4 (permalink)
heymccall
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Then you just need a master cylinder.
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Its not like I said I enjoyed reading Good Housekeeping while taking a candle lit bubble bath then proceeding to using a loofah with exfoliating creams all while thinking about you . Now THAT would be creepy
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