If the fuel is not even in the tanks its a pluged vent, noted by a woosh sound when you remove the fuel cap. Squirrel ^ gave me the part no. Adding a return fuel line is an essential part of your electronic fuel injection installation. The previous installation did not have this arrangement. The gas tank I replaced had no return line and the car had no return lines also. See Details. It shows the back mounting bracket. Drain the tank and check the standpipe. There is a fitting you can buy that replaces a portion of the fill hose, and there is a fitting that a hose connects to. the back pressure, as you say, in the return line will be no different whether you return to the top or bottom of the tank when it is completely full. 5.The position of fuel supply pipe end should be higher than about 50mm at the bottom of fuel tank of diesel generator set to prevent sediment and water from being sucked into the fuel supply pipe. Call For Price: 989-479-0444. And vent hose. Nov 20, 2021 First off where are you mounting it. NJ. How do you un vapor lock a diesel? I put a 38gal rear tank in my 93 f350 a couple years ago. One side of the duplex is a supply, one is a return. 22. For now however I would rather add the port before the . Any ideas on how I can fix this? So: reshape the tank bottom, make sure there are dividing walls in the tank, and take the fuel return all the way back to the tank. Rotary vane pumps need to be mounted low equal to the tank bottom or lower. If the Line were rigid between the Tank and the Metal Tunnel Line, it eventually would break due to vibration fatigue. One line (the "fuel in" side to your lift pump) is on top of the fuel tank, at the front, a couple inches in from the center of the truck, its the bigger of the two hoses you'll see. Only show this user. Another point to consider is the need for servicing. If back to the tank, it goes in via a top of tank fitting. (0) Reviews: Write first review. Fuel return line ? Most fuel feeds come off the top of the tank. The return fuel can go back to the tank, the injector pump or the filter..what does your engine maker reccomend. Oct 7, 2020. when the tank is almost empty, returning to the bottom should tend to siphon the return fuel back to the bottom so the gauge pressure of the return line, if it were measured at the injection nozzle, should theoretically be less than if it were . Our Billet Aluminum Bottom Sump with Integrated Fuel Return System completely eliminates the need to run the return of your aftermarket fuel pump to the top of the tank or cut into the fuel filler neck, therefore cutting install time tremendously! The in ground tank has 2 - 3/8" copper lines going to the furnace, one connected to the strainer, and the other connected to the bottom of the burner with no items in the piping between the burner and the oil tank. Good Luck. The steel tubing requires adapters to mate with the filter, 2 of a NAPA WH 1446 fitting. Please Call for Availability. More by the exhaust system and even more by the headers. Have a 350 in a 50 chevy with external new Holley red pump #12-801, preset at 7# no need for regulator, new gas tank with extra port for return line. The aluminum Fuel Tank Return Fitting provides a threaded hole in the fuel tank without having to reach inside the tank. Kevin EDIT: Crosspost with Artif, sorry. Garret 1 - 6 of 6 Posts From the tank bottom fit a shut-off valve and then a tee with the side pointing to the other tank. Have a good cooler in the return line. I hope the return line into the tank is big enough to properly regulate the EFI fuel pressure. So the regulator is actually on the return side of the fuel log. This is what GM did on lots of A/C equipped cars. May 17, 2012 All the people I know of that have a Cummins with an out of tank pump and return line has it returning to the fill neck. Went from an immediate starter hot to taking 5 or more seconds of cranking when hot. There is a fitting, I call a duplex plug (probally not the correct name). Bottom line here is, you really don't want the fuel line to be part of that potential mess. . Tried really hard to find a sender that allowed for a return line . If all you care about is vapor lock--all you need is a vapor return. When things get hot the gas begins to leak out of this connection - where the fuel line goes inside the tank. I did have to drill a hole in my fuel sender for a fitting I sourced online. The engine is not flooded it just seems not to be getting any gas. The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb. There will be no way to use that pump, as the fuel system design for an injected engine is completely different. I am going to attach a hose to the fitting to make sure the hot fuel dumps along the bottom. There should be a release on the inside ( guts ) fuel pump. I'm thinking a 1/2 feed with same return use'n the blazer tank return spot (top and to the side of tank) with a bigger inlet (stock looks like 3/8th) and soldering in a 1/2 feed where the stocker 3/8th" line runs in the sending unit.. or leave that alone and add another fuel feed to the tank.. and use the stock feed for the n.o.s. Suck from the bottom middle 2. As a reminder, I have no maintenance history on the car and have many indications of neglected maintenance. The 5/16 line crossing over the top of the pump is the return line back to the fuel tank. It will also have a fuel vapor separator and a charcoal canister. If yours is like this you need to initiate a syphon before connecting the inlet hose to the pump. is that something you can buy or it has to be made and how do you make it. Then, turn the key off again. The fuel line I use is the yellow transparent line 3/16 OD x 3/32 ID. 3. There is a vapor separator there on the driver side/top of the tank. Flat, low tanks let the fuel slosh around; the fuel will be supersaturated with air in the form of small bubbles. The vapor separator is plastic, two pieces that are glued together. If the carb has a built in primer, the fuel line closest to the primer bulb is your fuel return back to the fuel tank while the other fuel line is your main fuel feed. Your leak could be from either of the hoses, or the separator itself. Ok, so my experience is with high performance military off road vehicles Return to the bottom side 3. Switch tanks, or fill it up, and it runs normally. The top port goes to the bottom of the air cleaner. Get some good fuel treatment & treat all three tanks. My experiences with fuel tank design from first principles are: 1. Big difference. Have some ideas but how/where/size would you tap in return line to run back to tank. I am about to change out the fuel filter, strainer and various hoses and thought that this would be the time to address the tank as well. Details. #5. Return liquid spills into the same place you fill at. If you have front cross over tube drain the rest. The Installation instructions state that "The fuel return (leak off) pipe must loop down to be level with the bottom of the tank before it enters the top of the tank. The standpipe returns fuel above the fuel level inside the tank, so there is no back pressure from the tank. Jump to Latest Follow 1 - 12 of 12 Posts . for a filter with a return fitting. Here's a few tips which should help: 1. 0. the crossover line is basically a 3/8" line between the two tanks that has a T in the middle to send fuel to the engine. Your fuel filter is in upside down, this will make for long cold starts and maybe some fuel starvation at full throttle. That lowest valve on your tank is to drain out water and sediment. JKaz. If you are planning on running fuel injection, you will need a return line to the tank. I have a 454 with a stock fuel pump a holley 650 double pumper. Put it on and plugged the return hose. Also air is not made up of just Oxygen. The bushing is designed to accommodate two fuel lines. ** frustrating part** Cut hoses. This kit allows you to add the threaded bung with out having to do any welding. Make up the equalizing line with the side fittings as it is presently. The return is there for hot shutdowns to prevent vapor lock. First thing you want to do is remove the protective fuel tank cover with two 13mm bolts and pull over the tabs on the right side of the tank by swinging it down. The idea here is for the strainer to gently rest on the bottom of the fuel . I have a Honda CBR 900 SC28 with a tank where the breathing line / air vent seems to have been messed up by a previous owner. Instead of trying to force the issue, spray a small amount of lubricant onto the tube before insertion to aid in ease of entry. (Screws and plastic inserts gasket replace.) Crossover lines are prone to brakage and freezing. Guess I'll have to get under there and take a look. Frequently Purchased With Primer and Hos.. $19.48 Add to Cart 119. west monroe, Louisiana. This prevents fuel 'drain down'." The engineer says that this is unnecessary, and that it would not be a problem. For example, the filter should be mounted in a spot where you can get . did I ask that correctly? I looked inside the tank with a scope and it was treated with paint inside and looks like valve leading out to . Have at least 2 baffles between the return and the supply 4. The supply line carries fuel from the tank to the furnace. If I fill up too high, the fuel just leaks out the breather line. This hard line into the tank is about the same size as the main feed line. using Holley regulator, does the fuel need to be regulated back to the tank when using the factory return line from the regulator? Q1 - Therefore, could someone please confirm that I have the lines ID'ed correctly. . The smaller the bubble, the lower its rising velocity, hence more air travelling to the water separator. The old tank had rust problems so I put in a polyethylene 16 gallon fuel cell. In the end, the burner is LOWER than the bottom of the fuel oil tank. Then inside the tank the fuel return line connects to the venturi fitting on the bottom of the swirl pot to the external tank side via a snap on fitting i think they call it ( to the left of the fuel sender unit) then the external . I'm routing it from the return side on the bottom of the fuel pressure regulator. 1981zapper said: If you don't want to change the pump, you can add a T on the pressure side of the pump to carb line, Add an orifice with a 0.030" orifice and connect that to your 1/4" return line (vapor line) back to tank. Another huge concern is heat. Aerated fuel bad, Oxygenated fuel good. www.messicks.com Often times, the standpipe (item #47) is broken off inside the tank. If the return line goes to the bottom of the tank, it could work, but I don't remember whether it ends at the top of the tank, or at the bottom, Anyways, the selector valve has 2 lines at the top, 1 near the frame, 'n the other closer to the center of the truck (inboard),.. Also, measure from the bottom of the tank to the mounting deck, and match those measurements with the bottom of the strainer to the hanger gasket by trimming the rubber pump supply line, and clamping them to their ports. The specified minimum thickness is 0.090 inch; thicker is nearly always better when it comes to fuel tank material. I suppose also, you could try blowing back through the fuel pump supply line, use a nice piece of clear poly slid over the intake line. Return lines often go half way down or more into the fuel. From a physics standpoint, it should actually take more pressure to drop fuel from the top of the tank than to push it in from the bottom. Rogerstar1 Really not that difficult. Feb 11, 2012. Some aim toward the pump sump to help keep it full. If you fill one tank, gravity of the greater amount in the one side will force the fuel thru the line into the other tank until they are even. Having said that, the usually method, is to use two lines, a supply and a return. This process of cycling fuel from the tank to the injectors or throttle body and back to the tank is a complex process. They both appear to be the same size,. using a 780 3310 Holley. The pump wants cool fuel flowing through it all the time and what leaks past at the injectors is not enough to do much. Save them. It works very well and your pressure will be dead steady at all engine speeds. These usually will go into the top of the oil tank, and should be about 4 inches off the bottom. A complaint that "some" people have is they can now hear the fuel splashing, as it returns into the tank. The fuel returning did not make to loud of a "noise" doing this. The bottom hose goes to a small pipe on the side of the crankcase breather, that also goes to the PCV valve. The return was on the top. 1 sold in last 24 hours. Q2 - Does the return line drain into the top or the bottom of the tank. I have a part number if you want. It allows the vapor to blow out the top of the filter back to the tank. If you can drill a 1/2" hole you can do this. H Description: The purpose of the 791-181086 Fuel Return Tube is to return the excess fuel back into the fuel tank, after the primer bulb has been pressed and has primed the carburetor to start. Tighten the fitting snug by turning it clockwise by hand. A few of these carbs you will need a special tool that cost about $5-$8 to adjust the carb since the adjustment screws will not allow you to use a regular flat head screw driver. Zero Signal said: I could probably find a vacuum or fuel line that fits tightly into the return line coupling on the rail and prime it a few times into a gas can or bucket to see what happens. They both draw from the top and use a "GT" splitter in the return to Divide the fuel evenly to the tanks. Location. After time the Fuel Return Line will become brittle and crack and will need to be replaced. Application. Thanks. My fuel oil tank is buried. Learn more. They do not pull very well so they need essentially to be primed. You need to install one from a HJ61. That releases float arm to remove . Turn the ignition key to the accessory position for 30 seconds. Description: Condition: New. But 3/8" will take a while! With this system you run the feed line to the carb inlet line (fuel log) and on the other side of the fuel log is the inlet of the regulator. Fuel pump went out. Well, whether you are installing a new fuel tank in your boat or refurbishing an antique car, there are five things you must consider when looking for a new fuel level sender. Frequently Purchased With Fuel Tank Pick.. $8.60 Add to Cart The center line goes to the carb and the 'top' line goes to the return line. Mike Romain. Air, or vapors can only flow down in the . An NA-9 set up will have a sealed gas cap and the three vent lines in the tank body. A return-type fuel system is one that is designed with a fuel pressure regulator that diverges the fuel pressure based on the power of vacuum suction from the engine's intake system. DHD 700-515 Ultimate Fuel/Oil Mechanical Shut Off Dump Valve. Tanks must be constructed of 5000 series alloy, specifically 5052, 5083, or 5086 (note that 6061, a common marine aluminum alloy, is conspicuous by its absence from this list). This will determine the type of sender you will . If you still want to draw from the bottom there is no law against it. After the oil strainer, there is a tee with a single 3/8" copper line feeding the hot water heater. Had a new one on the shelf without a return line fitting. blowby, Oct 9, 2018 SHARE POST #6 Tanks should slope 1/4" per foot of tank length toward the outlet. Drain fuel out of the bottom until it runs clean. If at all possible, make sure the tanks & lines maintain a downward pitch toward the heaters. A better quick fix would be to cut the line ahead of where it's cracked, stick a rubber hose on it and stuff it down the tank filler neck (cap off obviously). However, the lines come into the basement wall about 2' higher than the bottom of the tank, they then go up, follow the main I beam across, and then drop 7' down to the oil burner. So you believe that there is a seperate bulk head in the gas tank for the gen fuel feed. You have a semi short hose from the tank nipple to the separator, and then the hose from the charcoal canister, as Gary mentioned. The FUEL OIL LINES are copper tubing which allow fuel to flow from the tank to the furnace and from the furnace to the tank. I estimate the bottom of the tank to be about 3' above the burner. Cut the tip of the fuel line that fits into the tank on a diagonal . When the standpipe is broken off, there is constant backpressure from the tank. This requires not only a fuel return port / line, but also a duplex fuel selector valve so when you pull fuel from the right tank, it returns excess fuel to the right tank. Yeah, if the lines look fine, you might be needing to drain your fuel tank. Now that you have a higher pressure return system. Matt. No fuel runs down the front of the tank near that fuel line. Brookings, OR. And that can be the stock-type 1/4" tubing; because you're bleeding vapor through a small orifice (~.060) into that 1/4" tubing. Remove plate. Over time the Fuel Return Line will become brittle and crack and will need to be replaced. (I cannot remember off the top of my head) and you should be good. Jim Dick said: Normally the generator fuel feed is located 1/4 tank from empty. I've taken off the two access covers under the back seat and there's no fuel at all leaking from the two caps to access the sending units, the 90 degree fitting, or the fuel line that comes out of the driver's side. Fuel vapor goes through the orifice rapidly, but it slows down liquid fuel nicely. Back to fast starting hot. Pop the passenger side off and pressurize the metal tube should blow out what ever restrictions is there The fuel tank holds 20 gallons of either premium auto gas or aviation fuel. Aug 12, 2021. You can see the fuel return line running . The lines have specific functions, if you connect the return to the breather your chassis will be pumped full it will areate the fuel , you can get the tank cleaned and steamed and have them drill a hole in the tank top and solder a return pipe that will go to the bottom of the tank ( under the liquid ) ,it would be a better thing to do as air in a fuel system will cause regulator control trouble and fuel pumps do not like it either as it will cause Aerated fuel can be baffeled and controlled. Return Line: You will need to drop the tank and replace the pick-up tube. The front of the tank on the driver's side is bone dry. Description: The purpose of the 791-182352 Fuel Return Tube is to return the excess fuel back into the fuel tank, after the primer bulb has been pressed and has primed the carburetor to start. From the Fuel Tank, gasoline flows through a short length of Fuel Hose into the Metal Fuel Line, which runs the length of the inside of the Tunnel.It is necessary to have a flexible Fuel Hose between the Tank and the Metal Line to absorb vibration/movement. Since the prime-out pressure is within spec, one would want to do this with it idling to see if the return line was the issue. Engines produce a lot of heat. Mar 15, 2022. I would almost assume there is a strainer to prevent a bit of debris from plugging the intake. Plenty of discussion on VAF for those that want to know more and I'll possibly get into it more later in the build. The pressure will be about 10 times higher, and there are requirements on fuel return lines, pump cooling and all sorts of stuff you don't need for your relatively simple 230G engine. When I get down to the neighborhood of 1/4 rank, it acts like it runs out of fuel. Buy in monthly payments with Affirm on orders over $50. 1. Directly in the middle of those are the fuel sending unit. One 49 state tank and one CA emissions tank (NA-9). Video of the Day Step 2 Insert the open end of a 3/8-inch copper oil supply line into either of the two duplex openings at the top of the tank. Be the first to write a review. No secret. On warm days it takes a lot of cranking to restart. The 3 fuel lines should be connected as follows: The (clear) main fuel line with the filter (filter inside the fuel tank) goes to the bottom of the carburetor (or the elbow shaped nipple). 2. This photo shows the front of the fuel tank with its mounting bracket at the bottom, and the fuel sensor at the right mounted to the sensor access cover. 1989 VN HSV SV5000. Price: US $49.99. The fix for this is to submerge the return line at the . In the bottom of the tee (on each tank) install a bell reducer to upsize to at least a 1-1/2 inch pipe and install a 6 inch long nipple. Aerated is the lack of fuel, that would be a issue but not the same. The middle port goes the vapor-liquid separator, the small tank in the trunk of a 510, or under an extension of the left fender well on a 521. Steve g C comotionman Registered Joined Mar 29, 2010 668 Posts This is the back of the fuel tank. EFI systems require a return line to move unneeded fuel from the fuel injection system back to the fuel tank. When you had a low pressure fuel system. Condition: New other (see details) Quantity: 2 available / 1 sold. Oxygenated is a Molicule in the fuel, if you have it you have fuel present. I lengthened the supply line in the tank, but left the return line the stock length. the issue with a return line is the tube inside the tank extends down to near the bottom of the tank so the fuel does not just free fall to the top of the fuel level and create air bubbles (aerate) which can end up entering your fuel line and causing a lean condition or starvation on a high flow pass so you can't just drill a hole and add a If you take the strainer out of the bottom you can stick a boroscope up there. The injector return feeds into a 5/16" line and snakes accrose the Y bridge picks up the cp3 return line then goes to the line that is by the glow plug module.. There's 3-4 rubber hose connections along the way as well.. Get tank as empty as you can. Put the tool around the hose then push it in towards the fitting till the hose comes off, if it seems hard you're doing something wrong. The lines are secured in a fitting at the top of the tank by a duplex bushing with flare nuts or compression nuts. Trim the return line to 1" above the tank bottom. You'll see indents towards the rear of the tank. When purchasing a fuel level sender, the first question to answer is what application the unit will be in. Regular Price $ 199.00 In Stock Buy now OR Add to cart Add to Compare Add to Wishlist Share (6) Then the return comes out of the regulator and back to the tank. Some go clear to the the bottom and feed a swirl pot sump. 49 state unit has a fuel feed line from sender and a vented cap. The vn i have has the in tank lift pump with only 1 outlet on the sender unit. 6.The connection of fuel return pipeline should not cause shock wave in the fuel pipeline of diesel generating sets. Click to expand. Step 1 Install a threaded duplex bushing into the fuel inlet hole at the top of the oil tank. Now you'll be looking at the very bottom of the fuel tank. Nothing makes . Looking to put a return line in system , figure it would help pump life & run cooler and maybe quiet pump. Just want the right sending unit on hand when I drop the tank. A return line is present on some models and will go through the sending unit. Take center console off tank. The filter used is a common GM fuel injection filter, NAPA 3481. Disconnect quick connects. A 3/8 coupling joins another section of steel tubing and connects to the fuel filter. fuel feed.. The return line is simply pushed inside the plastic gas tank through a hole on the bottom of the tank - a very iffy connection.
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