Very Leaky Hydrobooster, Safe to Drive? - Chevy and GMC Duramax Diesel Forum
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post #1 of 4 (permalink) Old 12-25-2019, 10:14 AM Thread Starter
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Very Leaky Hydrobooster, Safe to Drive?

Back in Sept, I discovered that my brake booster was leaking. From what I can tell (and thanks to the help of Hook'em_Horns), it is dripping from a weep hole in the bottom and had dripped onto the frame. I never saw it drip on the frame again and have been working 7 days a week until recently so I didn't have time to replace it. Well I noticed a drip spot under my truck yesterday. The hydrobooster is dripping onto a large wire harness that runs down to the frame in the drivers side fender well, traveling down and dripping onto the ground. This morning, the drip spot is larger. I know the system runs under pressure. I already have a new hydrobooster on hand but I need to drive to my dads shop to change it out. Will it be safe to drive since its leaking enough to drip not under pressure? I don't want to take a chance on running the pump dry and burning it up.

2011 LML Silverado 2500HD CCSB Z71, Leveled, Bagged, AFE DFS780 Lift Pump, B&W Companion.
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post #2 of 4 (permalink) Old 12-25-2019, 10:56 AM
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A little bit of PS fluid can appear to be a lake. It makes a mess of everything on the driver's side, and even past the firewall on everything under the cab (wind flow).
I've found also that PS fluid can dissolve the frame coating below it too.

Leaks onto other things below it (harnesses, inner fender, frame, hoses, etc), can continue to drip/accumulate on the ground with the truck not even being driven.

A HB leaking can drag on for months, slowly getting worse. Best thing (until replaced) is to not let the PS reservoir run low and burn up the pump. That reservoir doesn't hold much fluid to begin with. (don't overfill either)

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Last edited by Hook'em_Horns!; 12-25-2019 at 11:00 AM.
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post #3 of 4 (permalink) Old 12-25-2019, 11:11 AM Thread Starter
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Quote:
Originally Posted by Hook'em_Horns! View Post
A little bit of PS fluid can appear to be a lake. It makes a mess of everything on the driver's side, and even past the firewall on everything under the cab (wind flow).
I've found also that PS fluid can dissolve the frame coating below it too.

Leaks onto other things below it (harnesses, inner fender, frame, hoses, etc), can continue to drip/accumulate on the ground with the truck not even being driven.

A HB leaking can drag on for months, slowly getting worse. Best thing (until replaced) is to not let the PS reservoir run low and burn up the pump. That reservoir doesn't hold much fluid to begin with. (don't overfill either)
Thanks a lot Hook!

2011 LML Silverado 2500HD CCSB Z71, Leveled, Bagged, AFE DFS780 Lift Pump, B&W Companion.
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post #4 of 4 (permalink) Old 01-06-2020, 11:48 PM
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Had the same problem and monitored the power steering fluid levels for a while and added as needed. I was advised, especially because I was preparing to tow my toy hauler that I should get the hydro booster replaced as it would potentially pose a safety issue since it’s connected to the brakes as well. Just mentioning as good for thought.

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