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Car Advice

05/07/2018 2:47 PM

I own a 1980 Alfa Romeo Spider that was having idle problems, so I opened the hood on Sunday.

Here's what I found.

1. The rubber hoses are going bad.

2. I sprayed carb cleaner around the vacuum lines and found the leaks.

3. When I disassembled the parts to get to the vacuum lines, I ran into trouble - many of the hoses/connectors have gone bad also.

4. I called my local auto parts shop and the hoses are not available.

5. I went on line and the hoses are not available.

I would like some advice from someone who has had a problem like this - rubber parts going bad and no replacement parts available.

Here's a picture of the engine compartment (not my car, but one I found on the internet). Same components.

The three parts I need are circled in green and numbered.

The part to the left of 1 is the intake manifold. The part between 1 and 2 is the throttle body. The part between 2 and 3 is a steel intake. The part below 3 houses the air filter.

Part #1 is a piece of rubber with two clamps - I'm thinking about using this plumbing coupler

Part #2 is a rubber seal - different from the one above. It has a groove where the throttle body mounts to and the end that connects to the steel intake is just rubber hose. Not sure where to get something like it.

Part #3 is a thick reinforced rubber hose (like one of those universal radiator hoses). The picture below shows it connected with two radiator hose clamps. Mine is connected with a small screw and washer. The hose is oval. If I can't get one, I'm thinking of using the old part and using silicone wrap to seal both ends.

Your ideas are greatly appreciated.

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#1

Re: Car Advice

05/07/2018 3:24 PM
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#2

Re: Car Advice

05/07/2018 3:45 PM

Personally I believe you're way over-thinking this; there's no liquids involved and nothing is under high pressure/vacuum. Just go to your local parts store, get some rubber parts that are about the right size, cut them to fit, and use the self-fusing silicone tape to ensure a leakproof fit over the fittings.

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#3

Re: Car Advice

05/07/2018 5:31 PM

Being an Alfa, there's always oil where it shouldn't be. The accordian hose was pretty dry, so using the old part with silicone tape may work. I was hoping there would be a better solution.

There was a slight oil residue inside of the black steel part and all parts beyond - most likely coming from the closed crankcase ventilation system. I'm not sure how oil-resistant the home plumbing coupler is and is silicone tape oil resistant as well?

Part #2 is a tough one. The original rubber coupler has a slot where the lip from the throttle body fits. There is no clamp on this part, so it has to be rigid enough to hold the steel air piece place.

I was thinking about putting all the old parts back on, then wrap everything with silicone tape, but I don't want chunks of hard rubber tubing to make their way into the intake valve.

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#28
In reply to #3

Re: Car Advice

05/13/2018 4:54 AM

"Being an Alfa, there's always oil where it shouldn't be."

Lovely car, but I would suggest;

Call Michael Bream at EVWest & ask what your options / prices might be - (conversion to electric) Others (Zelectric, etc) could do this too.

Take motor out (tranny too?), wrap in plastic, place in corner of garage.

Send rest to converter -

Plug in every night, never buy gas again. 'Full tank' every morning.

Even put 'gas' back in your tank when going downhill, & stopping at lights.

Get Brm Brm soundtrack for audio system.

Nevermore oil leaks!

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#4

Re: Car Advice

05/07/2018 5:56 PM
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#6
In reply to #4

Re: Car Advice

05/07/2018 7:16 PM

It looks just like it, but the dimensions are off. That part is for the Giulia.

I saw it last night and I got so excited, I put it in the shopping cart. Then I noticed it was the wrong part.

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#5

Re: Car Advice

05/07/2018 6:03 PM

My 2 cents worth.

Modern radiator hoses, and probably lots of molded hoses are made from EPDM, ethylene propylene rubber.

It will withstand oil immersion, high temps and under-hood environments easily. Many O-rings and other parts are also made from this.

Modern fuel lines are PTFE, which is overkill here, I think

From what I can see, I'd go with the choices you are considering. Hoses and clamps.

Happy motoring!

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#8
In reply to #5

Re: Car Advice

05/07/2018 11:46 PM

Maybe you could just buy some liquid EPDM coating and dip your rubber pieces, or coat them in some manner, to prolong life....inside and out....

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#12
In reply to #8

Re: Car Advice

05/08/2018 1:20 PM

That sounds like a good idea.

Do you know if this stuff is good for oil, heat and other under hood environmental issues?

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#17
In reply to #8

Re: Car Advice

05/08/2018 3:26 PM

I was looking at Plastic Dip... it was used for automotive,... but could get any specifics on it or what kind of material it made of.

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#7

Re: Car Advice

05/07/2018 9:05 PM

This sounds like a good reason to buy a new toy.

I'm not talking about a new Alfa or other tiny, sports car. I'm talking about a flexible resin 3D printer. With this you can just fabricate new flexible couplers or adapters to available longer hoses.

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#13
In reply to #7

Re: Car Advice

05/08/2018 1:26 PM

Oooh, that looks really cool. I read that it's good for chemicals. Do you know what heat deflection temperature is? It's rated at 140 deg for 10.75 psi. Is this the max heat the product can take before it breaks down?

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#18
In reply to #13

Re: Car Advice

05/08/2018 3:49 PM

That all depends on which flexible polymer gets fed into the machine. Some machines directly print metal. Some machines are optimized to print for lost wax casting material. Many jewelers and dental labs use this today. Just think of all the other things one can do after getting the machine.

I suspect this technology will be simultaneously the saving grace for DIY home projects and the bane of OEM restorations. When a 3D copy can be printed overnight (or longer) why bother to salvage parts.

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#21
In reply to #18

Re: Car Advice

05/08/2018 8:24 PM

In one of my former careers, I was a jeweler and I can see the advantage of having a 3D printer to make wax molds. At times, we would get a bad casting (with porosity or fractures). Being able to do a 3D scan, create a copy in wax, repair the wax and cast - that's a dream for jewelers!

Or to make a copy of a piece of jewelry for a client!

Cool technology!

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#24
In reply to #21

Re: Car Advice

05/08/2018 11:10 PM

When a bad wax is printed you just chop it up and reuse.

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#29
In reply to #18

Re: Car Advice

05/13/2018 5:20 AM

Looking forward to being able to print taillight & sidelight lenses - clear, orange, red etc -

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#9

Re: Car Advice

05/08/2018 3:04 AM

<...1980 Alfa Romeo Spider...>

"Recycle. The possibilities are endless." - Anonymous Poster #0

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#10

Re: Car Advice

05/08/2018 9:44 AM

If you need more rigidity then look into Intercooler hoses for diesel engines.

Finding the right diameter is the challenge. Hoses abound.

Okay; in America, hoses abound.

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#14
In reply to #10

Re: Car Advice

05/08/2018 1:29 PM

Thanks for the advice. Years ago, I had a 1985 Volvo 760 Turbo and I remember the hoses/couplings that were on the car.

I bet I can find something out there (any intercooled turbo parts) that can be fitted to my car.

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#11

Re: Car Advice

05/08/2018 12:37 PM

In deference to two valued supporters for threads who previously replied - EPDM is not suitable for use with hydrocarbon based fluids (ie mineral or synthetic hydrocarbon based engine oils, transmission fluids, gear oils, fuel (gasoline or diesel). EPDM is used in brake systems using glycol fluids or cooling systems using ethylene glycols, propylene glycols, etc. Neoprene, Buna Nitriles, Viton, Kalrez are better choices.

From your photo of the engine bay - if you are wanting to make this functional but not keep the components OE - try searching one of the many aftermarket cold air intake systems available online. They may not make a kit specific to this Alfa - but would have 'generic' kits that would work. (example would be K&N Air Filters https://www.knfilters.com/cold_air_intake/alfa_romeo.htm)

If the desire is to keep this OE - checking salvage yards and or specialists that deal in Alfa parts such as the Alfa Romeo Owners Club http://www.aroc-usa.org/library/documents/Alfa_Romeo_Source_List.pdf

Cheers - keep classics on the road!!!

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#16
In reply to #11

Re: Car Advice

05/08/2018 1:38 PM

Thanks for the advice on EPDM.

I was thinking about your K&N advice, so I went to their website and found a generic coupler that I think is better than using a home drain coupler. There's also some other parts that may work, or other manufacturers that may have the part.

Good advice. Thanks again.

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#19
In reply to #11

Re: Car Advice

05/08/2018 4:01 PM

You are correct, when hoses are immersed. I went by this assessment, "the accordion hose was pretty dry," as this is an air intake hose. I'm sure Autobroker will make the correct choices.

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#20
In reply to #19

Re: Car Advice

05/08/2018 8:21 PM

Accordian hose (#3) was dry. The other two had some oil on them.

The two couplers had a film of oil on them (inside surface), but they aren't immersed, so it's an option.

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#25
In reply to #11

Re: Car Advice

05/13/2018 3:50 AM

I second contacting and becoming a member of the Alfa Romeo Owners Club chapter or equivalent in your area. Wealth of information from people who have done it all before.

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#33
In reply to #11

Re: Car Advice

05/13/2018 12:46 PM

I joined AROC - really nice people there! I asked the same question and received links to suppliers both new and used. I kept checking and checking with no luck. Then an Alfa expert told me that I have an oddball model year, where the Spica Fuel Injection system is unique, so the earlier parts don't fit. 1980 and 81 are the two years of this "special", emissions friendly Spica system, then in 1982, they changed to a Bosch system.

I have a 1982 Spider with the Bosch system that's been sitting at my mechanics shop for almost a year. He still can't get it running!

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#15

Re: Car Advice

05/08/2018 1:32 PM

http://www.aroc-usa.org/library/documents/Alfa_Romeo_Source_List.pdf

http://www.alfapartscatalog.com/

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#22

Re: Car Advice

05/08/2018 8:26 PM

Has anyone heard of a company that will remake rubber pieces? Maybe a company in China - copy the original and make copies? I'd love to have a half dozen or so of these parts sitting on my shelf. Either for own use, or future projects ... or to give to a friend in need.

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#23
In reply to #22

Re: Car Advice

05/08/2018 8:40 PM

I've made some flexible single and multi cavity molds with 2 part silicone embedded with fiber.

Thise simple parts look deceptively complex. Make a master mold/s (cast or print) and keep them on the shelf.

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#32
In reply to #23

Re: Car Advice

05/13/2018 12:34 PM

Thanks for the tip! I forgot about a rubber mold product we used in our business. It was actually a clear material we would pour into a metal mold with the jewelry in the center. It was low shrinkage and didn't need the vulcanizing machine to harden.

Do you recommend using fiber in the mold and for the part?

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#26
In reply to #22

Re: Car Advice

05/13/2018 3:54 AM

Look into 3-D printing.

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#27

Re: Car Advice

05/13/2018 4:16 AM

I would suggest finding the nearest available modern components and filling any gaps with Sugru

"Sugru is malleable when removed from its airtight, moisture-proof packaging, retains its plasticity for thirty minutes, and is self-curing at room temperature in approximately 24 hours. The material adheres to aluminium, steel, copper, ceramics, glass, fabric, brass, leather, plywood, and other materials, including ABS plastics.

When cured, Sugru has a 'soft touch' or slightly flexible, grippable texture similar to features commonly found in soft overmolds. It is waterproof and dishwasher-safe, and the material is thermally insulating, with a service temperature range between −50 and 180 °C (between -58 and 356°F or 223 and 453 K). Sugru is not resistant to isopropyl alcohol. While early versions of the product had a short shelf-life, as of 2014, it was being advertised as staying fresh for 13 months from the date it was made. According to the company, if kept in a refrigerator, the remaining shelf-life is tripled."

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#31
In reply to #27

Re: Car Advice

05/13/2018 12:18 PM

Very cool stuff! Thanks for the tip!

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#30

Re: Car Advice

05/13/2018 8:41 AM

These parts are fairly common in the newer and foreign vehicles. I would suggest getting measurements and hitting a junk yard. The might not be OEM parts but they should be comparable.

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#34

Re: Car Advice

05/13/2018 12:58 PM

A heartfelt thank you to everyone here. You've given me some great practical advice, which I appreciate.

Owning an older Alfa can be frustrating at times, but when it's running good, there's very few cars that can match the entire experience! Driving one does something to your soul! I love driving sports cars and the Alfa's are truly special.

I'm going to look into a few of the recommendations as well as a 3D printer - I've wanted one for a while! I'll keep you posted on what my final solution is and how it turns out.

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#35

Re: Car Advice

05/14/2018 3:55 AM

http://www.alfaworkshop.co.uk/parts/Spider_Intake_manifold.shtml

http://www.alfaworkshop.co.uk/parts/Spider_Inlet_flexi_hose.shtml

It's a uk company but it looks like they have some of the parts you need, maybe they will have all three.

Good luck

Steve

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#36
In reply to #35

Re: Car Advice

05/15/2018 4:09 PM

Thanks for looking this up for me. Unfortunately, those aren't the parts I need. I appreciate your effort!

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#37

Re: Car Advice

07/19/2018 3:41 AM

My solution:

Thanks to everyone for their advice. I read every one of your posts and gave it a lot of consideration.

Here's what I did:

1. I took the old parts to Home Depot and bought a few rubber couplers with radiator hose type clamps. I trimmed the parts with a utilty knife and with a little silicone grease, they slid right on. I tightened the clamps and I had a good, air tight seal.

2. For the long accordian hose, I cleaned the old part the best I could, then I installed it and used silicone tape to seal the ends.

My final act!

1. I drove my little Alfa and I remember why I love this car so much! So, I made a decision to buy a pre-smog car and change the system to dual Weber side drafts. I found a 1971 Spider 1750 with Spica, but the Spica was removed and dual Webers were installed! I bought the car and am working on having it trucked to my house.

2. As soon as my 1971 is here and running well, I'm going to sell my 1980 and 1982 Spiders. I know I'll kick myself someday, but my driveway is already full and I have four cars at my old house and five more at my mechanics shop, so I have no room for the two extra Spiders.

Again, thank you everyone for your advice. I know where to come for help from some of the smartest people I know.

Thank you.

Autobroker

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