brake booster double check - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hubscrub · 11-13-2010, 08:58 AM

Took the 85 k10 out last night to meet my wife and drove about 60 miles pulled in the driveway and lose my power brakes i'm thinking the booster whent out you can here a hissing or air when the petal is pushed while the engine is running. So i guess i'm just double checking myself if it is the booster.

( i have been wanting to detail the engine some maybe will start that now while i'm in there maybe it won't snowball

) btw. it's a 350 truck now, factory had a 305

James McClure · 11-13-2010, 09:55 AM

Hub, if ya hear a rather loud hissing in the cab with the engine on and it stops when you turn it off the booster is toast, replace it. When you do replace it, there is a pin behind the master cyl sticking out of the exact center of a black plastic piece behind the master cyl, DO NOT LOOSE THAT PIN!!! Your going to need it on the new booster. jim

11-13-2010, 08:58 AM	#1
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	brake booster double check Took the 85 k10 out last night to meet my wife and drove about 60 miles pulled in the driveway and lose my power brakes i'm thinking the booster whent out you can here a hissing or air when the petal is pushed while the engine is running. So i guess i'm just double checking myself if it is the booster. ( i have been wanting to detail the engine some maybe will start that now while i'm in there maybe it won't snowball) btw. it's a 350 truck now, factory had a 305 __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14

11-13-2010, 09:55 AM	#2
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: brake booster double check Hub, if ya hear a rather loud hissing in the cab with the engine on and it stops when you turn it off the booster is toast, replace it. When you do replace it, there is a pin behind the master cyl sticking out of the exact center of a black plastic piece behind the master cyl, DO NOT LOOSE THAT PIN!!! Your going to need it on the new booster. jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

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