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Looking to replace the vacuum lines in my '79 F250 since some of the rubber has become brittle. I'm afraid of ripping some of these rubber connectors because I haven't been able to find what they're called or where I can order them. Does anybody have any information on these pieces?
The 2 way connector goes into the side of my air filter and the 4 way connector attaches near the front of the engine. One line goes to the carburetor (assuming this is the line that creates the vacuum), one goes to the vac advance, one goes up to the 2 way connector and the last I still haven't determined where it goes.
I went over my lines a few years ago and was surprised how well those special rubber connectors held up. I was careful removing them and was able to re-use all. I don't know a source.
Worst case you could do without them by hooking lines up directly and using common "T" fittings as needed. This would require a good diagram and maybe some special marking to get and keep lines in the right spot. The factory service manual has good vac line diagrams... hopefully you have this resource or similar. Pictures and diagrams of the current setup (which may be changed and incorrect!) would help also.
Good idea to make a diagram of the existing setup. This truck appears to have had some pretty sketchy tune-ups in the past, so doing a diagram compare to what's in the service manual wouldn't be a bad idea.
You should take some good pictures of routing, as finding 79 emissions vacuum routing is impossible.
The hardest thing to find, iirc, is the 4 ported vacuum switch that your lines hook to in the second picture. I think that I had to reference a later year and have it ordered. I was able to get the connector on then back on but bumped it and broke a nipple off, very brittle.
Second that these seem to be pretty resilient parts - I replaced all the vacuum lines in my '78 with no issues. I sat in O'Reilly's lot and pulled 1-2 hoses the same size at a time, bought it to the nearest foot, and that way made sure I replaced everything exactly where it came from. I found that the left-over sections mainly got used for shorter hoses so I had remarkably little scrap. My vacuum gauge readings went from 5 pounds to
19+ at idle - a worthwhile job.
Try the Autozone web site - you will need to create a login but they show many vacuum diagrams in their technical assistance section.
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