ron350 Posted November 25, 2014 Report Share Posted November 25, 2014 What would be a good replacement for this rubber vacuum fitting from a 96 Regal 3800II motor? This is one of the 2 rubber vacuum fittings on the side of the throttle body. The small end of the rubber vacuum fitting fits on a .250â€OD tube and the large adapts up to a .400â€OD tube. I don’t know if the 3100 motor used this rubber fitting but there had to be a lot of 3800II motors that used the same rubber fitting. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted November 26, 2014 Report Share Posted November 26, 2014 Vacu-tite should have similar vacuum fittings like that available at any auto parts chain. They're not going to be OEM quality, but they should last you a couple of years. Quote Link to comment Share on other sites More sharing options...
ron350 Posted November 26, 2014 Author Report Share Posted November 26, 2014 Mfewtrail thanks for the reply and the tip about vacu-tite. I have never heard about vacu-tite before and will check them out at Auto-zone. It is sad they don’t make vacuum fittings in silicone. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted November 26, 2014 Report Share Posted November 26, 2014 Mfewtrail thanks for the reply and the tip about vacu-tite. I have never heard about vacu-tite before and will check them out at Auto-zone. It is sad they don’t make vacuum fittings in silicone. Better quality ones would go a long way for sure. I think the rubber composition makes all the difference in a factory fitting vs. a typical aftermarket one. In general, I see factory W's 20-25 years old with vacuum fittings that are still in reasonably good condition. If someone has a source for those, I'm all ears. If not, I bet money could be made in reproducing some quality pieces. I would buy a variety of elbows or straight fittings in various sizes just to have on hand. I do know one thing from handling fresh OEM vacuum fittings, the material is considerably more dense/harder than the replacement stuff. Quote Link to comment Share on other sites More sharing options...
Garrett Powered Posted November 26, 2014 Report Share Posted November 26, 2014 That is so true. I see the vacu-tite stuff get cracks in the rubber way sooner. I usually try and pocket as many of those as I can on salvage jobs if you get on a low mileage car to pick them off of. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted November 28, 2014 Report Share Posted November 28, 2014 I usually try to grab a full vacuum line set whenever I go to the yards. After a while, I accumulated a stockpile of vacuum lines and fittings. First gens seem to eat those 3-way check valves periodically, so those are good to have on hand too. Quote Link to comment Share on other sites More sharing options...
Imp558 Posted November 28, 2014 Report Share Posted November 28, 2014 I drove my L36 for over 2 years with one I made, it was a hunk of 1/4" rubber line, and a piece of 3/8". I streched the 3/8" out really far with needle nose pliers and shoved the 1/4" inside it before it had time to shrink back down. Wasn't pretty but it was stuff I had sitting in a drawer at the time and it worked dandy. Quote Link to comment Share on other sites More sharing options...
Turbocharged400sbc Posted December 4, 2014 Report Share Posted December 4, 2014 ive been using cheap silicone vac hose with rtv and that self bonding silicone tape to make my own vac fittings. i even made a mandrel for a completely silicone LIM T (1/8"x1/4"x1/8") its expensive but still cheaper than a new OEM vac harness...just for one T that isnt a universal ugly ass pos Quote Link to comment Share on other sites More sharing options...
Turbocharged400sbc Posted December 4, 2014 Report Share Posted December 4, 2014 the evolution of my diy T oem on left, final evolution/assembly, and last the "tape only" fail (real finicky about even tension, and the original mandrel design sucked lol) middle tested to -22"hg without collapsing or leaking. ive made 3 so far over the years Quote Link to comment Share on other sites More sharing options...
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