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Here’s a handy schematic of how the vacuum lines get routed on the 3.8 liter turbocharged motor found in 1986-1987 Buick Turbo Regals.
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Related Stuff:
wastegate/boost controller vacuum lines
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And for the vacuum block on top of the engine, here’s a handy pic of the rubber hose sizes:
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Hey, Turbo Buick Fan!
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