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Old 09-19-2022, 05:28 PM   #1
71CHEVYSHORTBED402
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Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,340
Vacuum hose colors?

I'm working on a 71 402/400TH with AC. Anyone know what the factory vacuum hose colors were for?

1. Transmission modulator to/from hardline. I believe they're solid black with ribs.

2. Vacuum advance line to/from hardline. I believe they're black with a white stripe and ribbed.

3. Intake manifold fitting to the vacuum reservoir canister.

4. Vacuum reservoir canister to the temp. control valve's #1 port. I believe it's solid black and ribbed.

5. *Temp. control valve to RH kick panel door actuator.

6. *Temp. control valve to upper cowl door actuator.

7. *Temp. control valve to heater water valve.

8. From carb. to air cleaner temp. sensor, and from sensor to the snorkel's diaphragm.

9. From carb. to choke diaphragm.

10. From carb. to charcoal can's "CARB" port. I believe it's black with a white stripe and ribbed.

*Note for this model the control valve's #2 port provides vacuum to the kick panel door, upper cowl door and water valve using two tees. The vacuum valve's #3 port for earlier models provides vacuum to the heater water valve.

Thank you
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Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025
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