New Fuel Line questions sorry!!!
Sorry about the blank post!
I'm gettting ready to change out feed and return fuel lines from Engine to Tank, Thanks for all the info I recieved from everyone, especially Infidel for all the great links and information!!!! I just got some hose from House of Hose EVCO they sent me Gates 30R7 but wanted to make sure it would be ok to use before I went to the pain to get in on the truck. I found this link to Gates and a PDF file could'nt figure out how to insert it on this post but here is the link a little long but worth checking out! If someone can figure how to upload it to the DTR it might be helpful to others. http://www.gates.com/common/download...chtipsform.pdf Gates recommends using the 30R9 hose and 30R10 in the tank. Which brings me to my next Q! how do you replace to the fuel feed supply line inside the tank? I can reach it easily enough but just wanted some help from someone who has replaced this line. also is there a filter or screen that can be replaced on the fuel sensor in the tank? Back to the hose. I will call House of Hose on Mon. to see if I can get the 30R9 from them. and 30R10 for tank!! Has anyone else used the Gates hose for the fuel lines? If so has it held up well? |
By reading the Gates page it seems like they are saying that on the one type of hose only the inner wall that contacts the fuel is resistant to fuel. If you stick it in the tank the outside of the hose might turn funny on you.
Seems that either type of hose would be ok outside of the tank. I always use Trident #365 hose http://www.tridentmarine.com/stage/fuel.htm but have never replaced an in the tank line. Here's the Gates pdf Avoid comebacks, install permeation-resistant fuel line hose Fuel line hoses carry gasoline from the tank to the fuel pump, to the fuel filter, and to the fuel injection system. While much of the fuel lines are rigid tube, sections of it are made of rubber hose, which absorb engine and road vibrations. There are two basic types of fuel hose: Fuel and oil hoses that meet the SAE 30R7 standard, and fuel injection hose that meets the requirements of SAE 30R9. Standard fuel and oil (SAE 30R7) hose is rated for low-pressure applications at 50 psi working pressure up to 3/8" size, and 35 psi for sizes over 3/8". This general-purpose hose contains a light reinforcement, and the rubber materials can be any compound that is suitable for fuel, oil and vapors. However, Gates Corporation engineers warn installers that fuel formulations at many US refineries are constantly changing as proprietary blends are introduced according to government mandates and seasonal influences. At times, more aggressive fuels can extract the oils that give SAE 30R7 hose its flexibility. The result is a brittle, stiff tube that will greatly reduce the performance and service life of the hose. Fuel injection (SAE 30R9) hose or MPI (multi-port injection) hose is reinforced to handle higher pressures up to 180 psi. It can be used on all injection systems that use hose clamps. It is not designed to replace coupled assemblies on fuel injection systems. Fuel injection hose is designed for low permeation contact with a wide variety of alcohols, alcohol fuel blends, and diesel fuel. It allows 15g/m2/day permeation whereas standard SAE 30R7 hose allows 550g/m2/day. (Gates fuel injection hose routinely performs at 1 to 2g/m2/day of fuel loss, well below the allowable standard.) Gates SAE 30R9 hose uses a laminated tube of Fluoroelastomer, as a thin wall inner layer backed by traditional compounds. This first layer protects the rest of the hose from attack, swelling or permeation from aromatics, oxidized gasoline (as can occur in fuel injection systems), ethanol or oxygenate additives and a wide range of petroleum based products. The laminated tube will resist cracking caused by "sour gas," which forms when unused gas is returned to the fuel tank. As an added benefit, this hose construction reduces emissions because fuel can't evaporate through the hose walls. SAE30R9 hose is also recommended for diesel fuel because its fluoroelastomer tube resists deterioration caused by some diesel fuel additives. As refineries produce cleaner fuels and lower allowable permeation rates during the “vehicle at rest” condition, older hose specifications such as SAE 30R7 are becoming less reliable. This type of hose is no longer specified on OEM automotive fuel applications because of stringent permeation standards. Therefore, Gates engineers assert that the best choice for automotive fuel line hose applications today is fuel injection SAE30R9 hose. For installers, it is the best choice for reduced comebacks and for high performance, assured trouble free service in a changing fuel environment. Finally, for submersible applications such as on the in-tank fuel pump, only SAE30R10 hose should be used, because when the hose fails, the pump will fail. Hose construction consists of low swell fluoroelastomer compounds in the tube and cover that resist gasoline and diesel fuel permeation and aging. Standard hoses have these fuel-resistant characteristics in the tube portion only. Contact your Gates jobber for information on Gates MPI/fuel injection hose and submersible fuel line hose. Gates Corporation PO Box 5887, Denver, Colorado 80217 |
Looks like the Gates 30R10 is designed to be submerged.
Trident looks like a superior hose overall. Can you buy the lengths you need from Trident? I was a little disapointed when I got the hose from House of Hose. I was hoping they would have sent a diesel rated hose when I asked for it! This Gates 30R7 seems to really only be rated for gas even by the discription the Gates company provides. I asked for a diesel Marine hose from House of Hose I hope they will work with me maybe they carry the Trident hose!!! I will call tomarrow. P.S. Infidel I hope you did'nt have to write out all that Gates stuff It looks like the link I provided works!! Thanks for the extra effort and another source of hose. |
Infidel I hope you did'nt have to write out all that Gates stuff It looks like the link I provided works!! On the pdf toolbar right next to the hand icon there is symbol that looks like an 'I' just click it then you can highlight, copy and paste any part of the text that you like. I buy the Trident in 50' rolls, does two and half trucks from American Hose in Seattle 800-877-8041. Never asked but assume they also sell cut lengths. |
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