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78 royale master cylinder [message #242627] Fri, 07 March 2014 10:45 Go to next message
dan molnes is currently offline  dan molnes   United States
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part book say's 78 brake master cylinder is a different # from 73-77 is that true, and what would the correct napa number be thanks dan
Re: 78 royale master cylinder [message #242649 is a reply to message #242627] Fri, 07 March 2014 14:49 Go to previous messageGo to next message
mikethebike is currently offline  mikethebike   United States
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Is the one you have rebuildable? Worst case is you would need to bore and sleeve it. Sleeve it with S/S and you are then pretty much done for life.

[Updated on: Fri, 07 March 2014 14:49]

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Re: [GMCnet] 78 royale master cylinder [message #242661 is a reply to message #242627] Fri, 07 March 2014 17:40 Go to previous message
USAussie is currently offline  USAussie   United States
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Dan,

Hmmmmmm, that's what the Parts Book 78Z notes, I carefully read ALL the parts below the complete assemblies and the it appears that
Key 8 - Piston - secondary was the part that changed and since the part it replaced is not listed it is superseded which means GM
didn't want you to use it! ;-)

The Napa P/N is P2085.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426


-----Original Message-----
From: dan molnes

part book say's 78 brake master cylinder is a different # from 73-77 is that true, and what would the correct napa number be thanks
dan

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
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