Vacuum Hose diameters

[moviewithnotitle]

Hi all,
My 96' has the Vortec 350. I'm doing a refresh of a number items including belt, lines and hoses in a few weeks. I would like to refresh the vacuum hoses as well, but have had a hard finding online the diameters of all the lines.

Does anyone have or know if an online resource listing the diameters? I am planning to purchase several feet of each diameter along with some of the pre-molded ones.

Thanks, MWNT.

 

[swathdiver]

Hi all,
My 96' has the Vortec 350. I'm doing a refresh of a number items including belt, lines and hoses in a few weeks. I would like to refresh the vacuum hoses as well, but have had a hard finding online the diameters of all the lines.

Does anyone have or know if an online resource listing the diameters? I am planning to purchase several feet of each diameter along with some of the pre-molded ones.

Thanks, MWNT.

On my cars of that vintage the vacuum lines were 7/32.

 

[willxfs]

I hope someone with some good knowledge chimes in here as I'm interested in this as well. I've owned my 1998 2door for 15 years now. I know there is a big vacuum line to the brake booster. Also think there is supposed to be a small vacuum line from a switch on the firewall to the heater control valve to bypass hot water to the heater coils when the ac is on. On my rig, its always been missing. Other than that, I cant remember any. PCV valve to intake, also?

 

[east302]

I hope someone with some good knowledge chimes in here as I'm interested in this as well. I've owned my 1998 2door for 15 years now. I know there is a big vacuum line to the brake booster. Also think there is supposed to be a small vacuum line from a switch on the firewall to the heater control valve to bypass hot water to the heater coils when the ac is on. On my rig, its always been missing. Other than that, I cant remember any. PCV valve to intake, also?

That’s about all that comes to mind, though there is a hard line that runs from the PCV fitting to the heater valve solenoid on the firewall in addition to the soft line (1/8”?) that goes from the solenoid to the water valve.

The valve closes when the temp dial is set to “max” and, on mine, lowers the dash vent temps by around four degrees or so.

 

[OR VietVet]

When I went looking I put in the year, make and model but at Auto Zone the year, make and model says is not a fit. Sorry. Still looking.

 

[liquify33]

I hope someone with some good knowledge chimes in here as I'm interested in this as well. I've owned my 1998 2door for 15 years now. I know there is a big vacuum line to the brake booster. Also think there is supposed to be a small vacuum line from a switch on the firewall to the heater control valve to bypass hot water to the heater coils when the ac is on. On my rig, its always been missing. Other than that, I cant remember any. PCV valve to intake, also?

I pulled that little fella at the junkyard just recently, could NOT find it online. FWIW I still have my broken one with a small line patch if you want it or pics of routing.
ETA: I’m thinking of the one from the firewall to the PCV that does the vacuum for the doors.

@moviewithnotitle RockAuto has most of the hoses with either specs or the factory form if they’re shaped funky. Heater, PCV etc...