[hatzie]

Fluid and vapor hoses. What should I use? How should I clamp them.

Many aftermarket and even OEM parts, like fuel pumps, transmission coolers, and inline filters, ship with the wrong hoses and cheap incorrect clamps causing more than a little trouble when they fail prematurely on parts like in-tank fuel pumps that are not very accessible.

SAE the Society of Automotive Engineers is a standardization organization that publishes engineering specs for various automotive and industrial systems.
You can search for free overviews of the SAE standards by J number on this page http://standards.sae.org/ Complete white papers can be purchased but they're pretty dry reading.

Most of the larger name hose manufacturers, Goodyear and Gates to name a few, make hoses that specifically meet various SAE standards. When the J-number is printed on the hose you know exactly what that hose was designed to do.

Hopefully this is useful to someone.

Fuel System Hoses

-SAE J30 http://standards.sae.org/j30_199806/

SAE J30 is the SAE standard prefix for fuel hoses. The suffix letter and number gives application specifics.

-SAE J30R6 Fuel Filler Hose http://www.goodyearrubberproducts.co...s/page0033.pdf

Application:

Flexible connection between the rigid filler neck and tank.
Usually supplied with formed bends.

-SAE J30R7 PCV Emission Control Hose http://www.goodyearrubberproducts.co...s/page0031.pdf

Application:

A multipurpose fuel resistant hose. Use for PCV and Charcoal purge lines.
Was used for low pressure fuel hose but J30R9 has a longer service life and a better vapor barrier than J30R7.

Specific Fuel:

Resistant to leaded and unleaded gasoline, diesel fuel, gasoline blends of ethanol (E10), E-85 and sour gas.

Specs:

Working pressure 50PSI
Temperature Range F & C: -40°F to +257°F (-40°C to +125°C)

WARNING: DO NOT USE J30R7 HOSE FOR FUEL INJECTION LINE OR WITH BIODIESEL.

-SAE J30R9 Fuel Injection Hose http://www.goodyearrubberproducts.co...s/page0032.pdf

Application:

Fuel Injection Hose Designed specifically for auto and truck fuel injection systems. Should also be used as low pressure fuel line and fuel vapor recovery line. J30R9 has a better vapor barrier than J30R7.

Specific Fuel:

Gasoline, ethanol extended gasoline (E10, E-85), oxidized sour gas, diesel fuel, biodiesel.

Specs:

Working pressure 100PSI
Temperature Range F & C: -40°F to +257°F (-40°C to +125°C)

WARNING: DO NOT USE J30R9 HOSE FOR FUEL PUMPS INSIDE FUEL TANK.

-J30R10 Submersible fuel injection hose.http://www.gates.com........submersible-fuel-line-hose
Engineered for constant contact with fuels on the inside and outside.

Application:

Fuel Hose capable of handling gasoline, alcohol-extended gasoline or diesel fuel in fully immersed, mobile, stationary and marine applications.

Specific Fuel:

Gasoline, ethanol extended gasoline, oxidized sour gas, and diesel.

Specs:

Working pressure 100PSI
Maximum temperature rating: +302°F (+150°C)

NOTE: Many fuel pumps including units from trusted manufacturers ship with hoses not labeled J30R10. Nowhere in their documentation do they state the included hoses meet this standard. I've had these un-marked hoses split on a car. I had to drop the tank a second time to put in the right stuff. It's far easier to buy hose you know won't fail in service.

-6.2L & 6.5L Diesel Injector Return Hoses Nitrile Butadiene Rubber >NBR< Fuel Hose with Black Woven Cover capable of handling low pressure diesel without clamps.

OEM GERMAN >NBR< Black Woven Cloth Covered Nitrile Butadiene Rubber

Application:
Bosch Injector return line for all GM AMG Detroit 6.2L 6.5L Diesel, 1995 and prior VW/Audi IDI Diesel, and 1999 and prior Mercedes Diesel.

• 1/8" 3.5mm Woven cloth covered >NBR< return fuel line used on VW, AUDI, Mercedes Benz, & GM Bosch type diesel fuel injectors.
  No SAE rating. You can buy 5 meter coils of the real thing on evilbay or shorter lengths from a local VW Audi shop.
  If it doesn't have "MADE IN GERMANY" along with >NBR< emblazoned on the woven cloth cover like the above picture don't buy it or, if you just bought some of the wrong stuff, send it back. As with most things these days there are Chinese counterfeits out there. The counterfeits melt internally.
• The return lines are daisy chained down each injector bank. At the end of the chain on each cylinder head will be a Bosch line cap or terminator Part # VW/Audi 028130229A or 068130229A or Mercedes Benz 4030700055.
  It's not gauche to use a short section of return line with a 3.5mm plug if you're in a bind. Use a 1/8" 3.5mm smooth piece of nail or similar. I cut a couple plugs out of soft black ABS plastic on my 7x14 lathe.

Tygon
DieselPlace thread on Tygon Return lines.
Be sure to get the real thing. If it hasn't got TYGON emblazoned on the tubing it ain't. As with most things these days there are Chinese counterfeits of Tygon fuel line and they melt when exposed to fuel.