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Old 04-30-2020, 05:46 AM   #74
72K5CSTDarkOlive
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Join Date: Aug 2013
Location: Central Coast, CA
Posts: 774
Re: The never ending K5 Build LS Swap

Engine back in. Made some cosmetic changes. I fired the engine up and ran it for a few minutes but wasn't ready for a test drive cause I had no brakes. Made good oil pressure, no unusual noises, so far so good. I spent 2 weeks messing with my brakes. Air was getting in somewhere and for the life of me I couldn't locate it. There was no visual leaks of any kind. I tried using a new MC and prop valve and the same thing kept happening, pedal would sink right to the floor with no pressure. I did the two man bleeding process, I used one of those mityvacs, and I even tried reverse bleeding sending fluid back to the mc from the bleeder valve. I was completely stumped.

I decided to replace the lines at this point. Went to local parts store, bought 25 ft of 3/16 brake lines and new union fittings and started making new lines. After doing all that the brakes started building pressure right away and was able to bleed them.
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My Build Thread 72 K5 http://67-72chevytrucks.com/vboard/s...d.php?t=628612

Build version 2.0: 72 K5
6.0 LQ9, 4L80e, NP205
http://67-72chevytrucks.com/vboard/s...d.php?t=793192
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1972 CST K5 Blazer Dark Olive
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