Blown seal on high pressure line to steering box: GM hydroboost

Joined
Dec 31, 2017
Messages
12,033
Location
SE British Columbia, Canada
I found out is is possible for a rubber seal to fail on a high pressure line into a GM steering box on a hydroboost system. The hydroboost system uses the power steering pump to provide pressure to both the power brakes and power steering. It can get spookey if you lose pressure. I had a slow but significant leak where the high pressure hose enters the steering box.

I backed out the fitting, removed the torn rubber seal and replaced it with a new one. So far it works well. Here is a photo of the fitting where the silver line enters the box. ( it’s much cleaner now than before).

92F7F7AC-3023-4FAA-BA44-E438F6E3B387.jpeg
 
Joined
Jan 9, 2010
Messages
12,910
Location
Los Gatos, CA
The hydroboost is a common replacment for the power brake booster on C3 Corvettes. It can be difficult to get a decent pedal in these cars if you don't have the carb idle mixture at or near max vacuum.
I hear the improvement is night and day. And it is an easy swap.
 
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