Where does this Ghibli hose go??

There's a hose that comes off the intake manifold of my Ghibli ('67 #616), runs toward the back of the car. It's in the midline and is approximately under the #3 Weber. My lights work fine and I think everything else does as well. It's obviously a vacuum hose, but to where??. Early emissions, like a PVC or something? thanx. steve "Never enough time to do it right, always enough time to do it over"

 

Hi Ivan, thanx for the response. it's a pretty big hose ?? ID of about 1/2", as I recall. Let me see if I can get a good picture of it...might be tough, tucked under the carbs as it is. thanx again. steve "unencumbered by the thought process"

 

Ivan, I've enclosed two pictures...one from the right and one from the left. I made an error, a big one: the hose is from the "valley", not intake. So it's probably part of the PVC system, I'll bet. It's not seeing full manifold vacuum, 'cause it's not part of the intake. The pictures show the orifice with the hose i attached. The hose has a hose clamp on it, so you should be able to see it. It's tucked below the #3 and #4 carbs. I put a little red paint brush in there to help ID this. Let me know what you think. thanx s
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Ivan, thanx for checking. steve

 

thanx again. I too believe this is some sort of rudimentary emissions system, like the road draft tube on my '62 'vette. Right now, it's capped off, but might be best to let "drain" over the bellhousing, as noted. thanx again. "when you're up to your ass in alligators, it's hard to remember that you originally came to drain the swamp" s

 

It's really tough to get a good shot of that darn hose, but it's not coming off the intake, it's coming off the "valley", so it's really under moderate positive crankcase pressure, not vacuum. I'll bet that blocked off, it's now causing my car to smoke like crazy! Easy enough to tell, just start the engine and see if that hose sucks for blows....'nuff said! thanx again. "when you're up to your ass in alligators, it's hard to remember that you originally came to drain the swamp" s

 

Bob, thanx for your interest. Let me see what I can ascertain and picture this PM. As noted, a quick test would be to "uncap" the hose (it's got a bolt secured by an Ideal clamp on the end of it now) and see if it sucks or blows with the engine on. s

 

It's late and those pix will have to be sent in the AM. But, I unblocked the hose and it has
POSITIVE pressure, not negative with the engine on. So, tho' it looks like it's coming from the intake, it's not. Furthermore, dc'ing the hose, seems to have cleared up the smoke that was blowing out the tailpipe. I'm pretty sure it's part of some sort of early emissions system, not intake driven. Thanx again. steve "Never enough time to do it right, always enough time to do it over"

 

OK, here's another view, and it's the best I can do. In the picture, my big fat thumb is in the lower left hand corner, holding the Craftsman screwdriver. You can follow the screwdriver handle down to where the screwdriver tip is pointing to the hose, with its Ideal clamp, between carb #3 and #4. I hope the picture's in the correct orientation. If not, just stand on your head and it'll be right.

I fired it up last nite and the hose seemed to have a sl. positive pressure, certainly not a vacuum. Now, I'm even more confident that the hose has it's origins in the "valley'" and not the intake, as I had originally and erroneously believed. I don't see that hose in the diagram that Bob sent, probably because it's not part of the carb and intake system. Agree?

Thanx again. s
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Hi Bob, Right, the large braided hose with the banjo bolt was NOT what i was trying to show...so much for a career in photography for me! (Sorry you had to cock your head to one side to see the other picture, but it is more representative of what I was trying to show.) When I got the car, the hose was broken and just hanging off its connector in the "V". I was going to put on a new, long hose and, as suggested earlier, drape it over the bellhousing as a "road draft tube"; not vastly different than the "puke tank" on my Kirkham Cobra. s

 

I just spoke with Terry Myr, an Italian exotic expert in Michigan. He confirmed what Ian said: early Ghibis had this vent hose. Gotta make sure that they don't get plugged up with crud and cause smokin'. Thanx again to everyone who helped me. steve

 

I'm not sure of the exact part of the crankcase being vented. But the nipple fitting screws into a threaded orifice between #3 and #4 carb, the hose pushes onto that fitting. Not sure what else to say about location. Thanx again. steve