I had the Burb (1958 Suburban, 1975-80 250 6 cyl) out for a drive today and it is acting like it has a vacuum leak. Looking under the hood I don't see anything obvious but the vacuum hoses are an assortment of sizes and are pretty old. What would be the best replacement vacuum hose? Seems like I remember a discussion about not using fuel line since it doesn't resist crushing from the vacuum.
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Fuel hose would be fine, given the small size needed. The thickness to diameter ratio would be large enough to resist crushing. In larger sizes, like 5/16 or 3/8 inches, I would agree not to use fuel hose for vacuum service.
Per this [goodyearrubberproducts.com], even 1/2" hose is rated for 24" HG vacuum. SAE 30R9 fuel hose is available about anywhere. I didn't find a vacuum rating for the possibly more common SAE 30R7 fuel hose.
Last edited by klhansen; Tue May 30 2023 06:12 PM. Reason: added link
Kevin Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] #2 - '29 Ford pickup restored from the ground up. First car '29 Ford Special Coupe Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
