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timtechcorvairwiki:07_engine_tune-up:hoses

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HOSES

by Tim Palmer

I recently had to replace several PCV hose on my Rampside. I noticed some existing hoses I had put on were not the proper size. I then decided that it was time for me to do some research and find out what the proper sizes are so I could keep a stock of the hose sizes I actually use. The table below is the results. It may or may not be complete. If you have any addition or corrections please let me know.

I did discover two rules of thumb. PCV and vacuum hoses are 1/32“ smaller than the outside diameter of the barb the fit on. With a few exceptions the PCV and vacuum hoses do not use clamps. If the proper size is used I have found they fit very well. For fuel hoses the hose's size is the same as the outside diameter of the steel line and always have clamps.

CORVAIR HOSES

TYPE HOSE SIZE APPLICATIONS
VACUUM 5/32” Distributor to carb. Carburetor to choke pull off. Balance tube to PG modulator.
VACUUM 7/32“ Turbo choke tube to carb. choke.
VACUUM 9/32” 61-63 and 64-65 w/CAC, PCV tube to air cleaner.
VACUUM 11/32“ 61-63 and 64-65 w/CAC, Balance tube to PCV valve. 64 exc/ CAC, Balance tube to PCV orfice.
VACUUM 15/32” 61-63 and 64-65 w/CAC, PCV valve to tube. Balance tube to head.
FUEL 1/2“ Filler vent.
FUEL 5/16” Fuel tank to main line. Main line to engine line.
FUEL 1-3/8“ Filler tube.
DUCT 2” Defroster (w/gas), Box to defroster outlet.
DUCT 2-1/2“ Defroster (w/air), Box to defroster outlet.
DUCT 3” Warm air (61-64), Engine to heater fan.
DUCT 4“ Heater, Engine to heater fan box.
INTAKE MANIFOLD 2-1/8” Intake manifold, Turbo to crossover tube.
OIL 5/8“ Turbo oil drain to passenger side head.
WINDSHIELD WASHER 5/32” All Washer pump to nozzle. FC bottle to washer pump.
WINDSHIELD WASHER 7/32“ All except FC. Tank to washer pump.
timtechcorvairwiki/07_engine_tune-up/hoses.txt · Last modified: 2015/01/13 17:06 (external edit)