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  #11  
Old 06-18-2008, 11:04 AM
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turbojd turbojd is offline
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Default Re: Powermaster problem

Check valve came with my booster. You can probably get one from GM if you need to.
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  #12  
Old 06-18-2008, 11:07 AM
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Lightbulb Re: Powermaster problem

Dual diaphragm is smaller in diameter, giving more room on the firewall. A single diaphragm may not even fit.

Both the check valve and inline filter are commonly available.
http://www.partsamerica.com/productd...Number=CV89000
http://www.partsamerica.com/productd...egoryCode=3110
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  #13  
Old 06-20-2008, 06:01 AM
MSKBuick MSKBuick is offline
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Default Re: Powermaster problem

Thanks for the help guys. I think I am still going to convert to the vacuum system, but I did notice that when I pump on the brakes with the powermaster system (ignition off) that I could hear a whoosh/hissing noise coming from the powermaster assembly. I wonder if the problem is an internal leak in the powermaster body. I will probably set the unit on the shelf in case I ever want to restore the car to original and see if there is a internal rebuild kit for it should I ever want to restore it. Again thanks for the help on the vacuum conversion, I think I am going to convert to it.
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  #14  
Old 06-20-2008, 11:23 AM
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Lightbulb Re: Powermaster problem

Quote:
Originally Posted by MSKBuick
I will probably set the unit on the shelf in case I ever want to restore the car to original and see if there is a internal rebuild kit for it should I ever want to restore it.
There was one. GM on longer sells it. Given that Karps Brake Service in California and Cardone are still rebuilding Powermasters, someone either still has stock, or is making the parts.
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