Hydroboost?

[kbenz]

Changed the seals in my hydroboost bout 2 weeks ago. Started leaking bad again today. Did I screw up the install or should I be looking for something else?

 

[kbenz]

looks to be leaking where the master bolts to the booster

 

[Domer]

looks to be leaking where the master bolts to the booster

That's the main Piston seal. They are easy to rebuild. I've done both of mine a few times. I get my gaskets from Boost auto. Just need the figure 8 looking o ring and the Piston seal. When you put the bodies together, put a little silicone on helps. If you have a tight fitting Piston seal, when assembling from the other end, use a small tool to depress the gasket lip.

 

[Domer]

GM Hydroboost Seals

If you have a power steering leak between your master cylinder and your hydraboost this seal is exactly what you need to repair it. The repair can be done by almost anyone by following the repair video below. Typically these leaks are not actually your power steering pump or reservoir, instead...

boostautoparts.com

 

[kbenz]

yep, that's what I replaced. was good for a couple weeks now it's leaking worse. I didn't use any silicone though. I'm starting to wonder if I didn't put the seal in backwards

 

[Domer]

yep, that's what I replaced. was good for a couple weeks now it's leaking worse. I didn't use any silicone though. I'm starting to wonder if I didn't put the seal in backwards

Have to male sure the seal lips face inwards toward the main body.

 

[WutCudGoWrong?]

Have to male sure the seal lips face inwards toward the main body.

This.

Ive put it in backwards before and could never get the air fully purged.

Do it soon or the air will eat up your PS pump.