Identifying cracked, disconneced and dangling Hoses

[simon]

I’ve been working on the problem described in this post: http://www.fiatspider.com:16080/f08/vie ... f=5&t=4299

Today I took off the air filter housing so I could get a look at the hoses on the carburetor. What I found is pictured below. I was pretty sure that there was fluid leaking from the carburetor – looks like those hoses might be the source.



I looked in the manual I have – but it’s not specific enough to have info about those hoses (Part Numbers – what exactly they are/do). I want to make sure that the hoses that I replace them with are both the proper size and made of the proper rubber for the jobs they do.

So, I have two questions:

#1. Can anyone tell me what those two hoses are and what their part numbers are?

#2. Can anyone point me in the direction of a guide that has part numbers and illustrations for a 1978 Fiat Spider 1800? It seems like I will need this info quite often.



I also found this hose:



It’s not connected to anything. I can’t tell if it came off of something or if it was intentionally disconnected. This car was a California car at one point. I’m wondering if this is just part of the emissions system that someone disconnected. I noticed that the two relays on the right side of the image are also disconnected. Again, a detailed shop manual would be really helpful. The Chilton’s guide I have is from 1978 and covers many different models/years of Fiats – so it’s very little help.

If this isn’t being used can I just remove it? It seems like having hanging/dangling parts in the engine compartment is dangerous.

[So Cal Mark]

the upper hose in the first pic is the bowl vent, it only contains vapor. The lower hose in the pic is the return hose to the tank; it contains liquid. There aren't part numbers for those hoses, they are sold in bulk. From the looks of the pics, all of the hoses need to be replaced. They all look original and are deteriorated. If you don't have emission requirments, much of it can be removed. I'd plan on replacing that fuel filter too, it looks pretty old. The cheapest route would be to buy a couple of rolls of fuel hose, both 1/4" and 5/16" (or the metric equivalent) and replace all of the hoses

[simon]

the upper hose in the first pic is the bowl vent, it only contains vapor. The lower hose in the pic is the return hose to the tank; it contains liquid. There aren't part numbers for those hoses, they are sold in bulk. From the looks of the pics, all of the hoses need to be replaced. They all look original and are deteriorated. If you don't have emission requirments, much of it can be removed. I'd plan on replacing that fuel filter too, it looks pretty old. The cheapest route would be to buy a couple of rolls of fuel hose, both 1/4" and 5/16" (or the metric equivalent) and replace all of the hoses

I was wondering if all the hoses needed to be replaced (they squish quite a bit when i pinch them). It's good to get confirmation of that. I'm sure this is a stupid question, but where do you buy rolls of hose like that? Would some place like NAPA or AutoZone have it (or is that the expensive route?). And should i be buying metric because the car is italian (did i mention i have no idea what i'm doing?)

One other thing...how do i identify what is part of the emissions system and what isn't? I have yet to find a good source of images identifying the parts of this engine.

[So Cal Mark]

most any auto parts store will sell a roll of hose. Typically you can buy a 10ft or 15ft roll for a lower price than buying by the foot. Either standard or metric hose works fine, you may find it easier to get the standard hose. As for emission hoses, the fuel inlet and return are a must and the large vacuum hose to the brake booster is also needed. After that, the crankcase breather is the only other item that shouldn't be eliminated

[simon]

Okay…so I replaced the hoses today. And what I learned was that they were only part of the problem (I’m getting the feeling that’s how working on vintage cars goes). Each of the hoses going to the carburetor is attached to a little brass tube that goes into the carburetor itself (not sure what these are called). They are all loose and leaking (see image below). So…does this mean it’s time to rebuild the carburetor? I don’t see how you can tighten those up without taking the carburetor apart. Would a carburetor re-build kit include a solution to this problem?



I learned some useful information today. I ended up purchasing the fuel hoses that I needed from Advanced Auto. When I went to Lowes get the hardware to hook the hoses up I found that they carried the exact same fuel hose for half the price ( $0.80 a foot) – A quick stop at ACE hardware and I found that they too carry the same fuel hoses for slightly more than Lowes, but much less than the two auto parts stores I’d been to. Not sure if that info will help anyone, but I never would have guessed that hardware stores carried fuel hose – so I thought I would pass the info on.

[manoa matt]

If buying hose from hardware stores make 100 percent sure it is fuel line. The brass inserts are pressed into the carburetor housings. They do come loose from time to time when trying to break loose the hose. Simply tap it back in with a piece of hard plastic or wood mallet. Don't tap too hard or the brass insert may distort or the carb casting might crack. The brass nut in the picture houses a small metal screen strainer, take it out and make sure its clean.