Jump to content

Search the Community

Showing results for tags 'overflow valve'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • 911 Support Area
  • 5th Generation Ram Cummins
    • 5th Generation Ram 6.7L Powertrain
    • 5th Generation Ram 6.7L Non-Powertrain
    • 5th Generation Ram 6.7L Reliability / Performance
  • 4th Generation Ram Cummins
    • 4th Generation Ram 6.7L Powertrain
    • 4th Generation Ram 6.7L Non-Powertrain
    • 4th Generation Ram 6.7L Reliability / Performance
    • 4th Generation Articles
  • 3rd Generation Dodge Cummins
    • 3rd Generation Dodge Powertrain
    • 3rd Generation Dodge Non-Powertrain
    • 3rd Generation Dodge Reliability / Performance
    • 3rd Generation Articles
  • 2nd Generation Dodge Cummins
    • 2nd Generation Dodge 24 Valve Powertrain
    • 2nd Generation Dodge 12 Valve Powertrain
    • 2nd Generation Dodge Non-Powertrain
    • 2nd Generation Dodge Reliability / Performance
    • 12 Valve 2nd Generation Articles
    • 24 Valve 2nd Generation Articles
  • 1st Generation Dodge Cummins
    • 1st Generation Dodge Powertrain
    • 1st Generation Dodge Non-Powertrain
    • 1st Generation Dodge Reliability / Performance
    • 1st Generation Articles
  • Other Vehicles and Trailers
    • Mopar, Dodge, Chrysler, or Plymouth
    • General Motors, GMC or Chevy
    • Ford
    • Foreign Vehicles
    • Cummins Swaps
    • Utility Trailers & Recreational Vehicles (RV's)
  • Mopar1973Man's Community
    • Introductions
    • General Conversations
    • Nation Wide Groups
    • Mopar1973Man Website
  • Vendor, Dealers and Classifieds
    • Classifed Ads
    • Vendors & Dealers
    • Classifieds
  • Government & Politics's Topics
  • Spiritual & Religion's Topics
  • Prevail Web Manangement's Topics
  • Herbal & Medicinal's Topics

Categories

  • Home
  • 1st Generation
    • Part Number Lookup Tool
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior
  • 12 Valve 2nd Generation
    • Part Number Lookup Tool
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior
  • 24 Valve 2nd Generation
    • Part Number Lookup Tool
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior
    • TSB Articles
  • 3rd Generation
    • Part Number Lookup Tool
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior
  • 4th Generation
    • Part Number Lookup Tool
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior
  • General Cummins
    • Engine
    • Transmission & Transfer Case
    • Axles, Suspension & Brakes
    • Cab Interior
    • Truck Exterior

Product Groups

  • 1998.5 to 2002 Dodge Ram
    • Mopar1973Man High Idle
  • Mopar1973Man Swag
  • Special Invoicing Items
    • Raffle
  • Products

Categories

  • Dodge Ram Cummins Classifieds
    • 1st Generation Dodge Ram
    • 2nd Generation Dodge Ram
    • 3rd Generation Dodge Ram
    • 4th Generation Ram
  • Vehicles
  • Personal Stuff

Categories

  • Cummins Diesel Power Trucks
    • 1st Generation
    • 2nd Generation
    • 3rd Generation
    • 4th Generation
  • Dodge, Chrysler, Mopar
    • Other Dodge & Chrysler Products
    • Old Mopar Muscle Car & Trucks
  • Trailers
    • Recreational Vehicles
    • Utiltiy Trailer
  • Motorcylces, ATVs, UTV, etc.
    • Motorcycles
    • ATV
    • UTV
  • General Motors Car & Trucks
  • Ford Car & Trucks
  • Other Vehicles
  • Tractors and Farm Equipment

Categories

  • Quadzilla Standard Tunes
  • Quadzilla 4K Racing Tunes
  • Quadzilla XZT Flash Files
  • Quadzilla Adrenaline V1 Flash Files
  • Quadzilla Adrenaline V2 Flash Files
  • Quadzilla Arenaline iQuad Mobile Device Apps
  • Cummins CCD Bus Test

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


Phone


Location

Found 5 results

  1. Bosch VP44 Injection Pump Overflow Valve Overflow Valve Description The overflow valve is located on the side of the Bosch VP44 injection pump. It is also used to connect the fuel return line (banjo fitting) to the Bosch VP44 injection pump for your Cummins powered Dodge truck. Overflow Valve Operation Fuel volume from the fuel transfer (lift) pump will always provide more fuel than the fuel injection pump requires. The overflow valve (a check valve) is used to route excess fuel through the fuel return line and back to the fuel tank. Approximately 70% of supplied fuel is returned to the fuel tank. The valve opens at approximately 97 kPa (14 psi). If the check valve within the assembly is sticking open, fuel drainage of the Bosch VP44 injection pump could cause hard starting. If a Diagnostic Trouble Code (DTC) has been stored for “P0168 decreased engine performance due to high injection pump fuel temperature”, the overflow valve may be stuck in closed position. Overflow Valve Diagnosis And Testing A rubber tipped blow gun with regulated air line pressure is needed for this test. 1. Clean area around overflow valve and fuel return line at Bosch VP44 injection pump before removal. 2. Remove overflow valve from Bosch VP44 injection pump and banjo fitting. 3. Discard old sealing gaskets. 4. Set regulated air pressure to approximately 97kPa (14–16 psi). 5. Using blow gun, apply pressure to overflow valve inlet end ( the end that goes into Bosch VP44 injection pump). 6. The internal check valve should release, and air should pass through overflow valve at 97 kPa (14–16 psi). If not, replace overflow valve. 7. Reduce regulated air pressure to 10 psi and observe overflow valve. Overflow valve should stay shut. If not, replace overflow valve. 8. Install new sealing gaskets to overflow valve. 9. Install overflow valve through banjo fitting and into Bosch VP44 injection pump. 10. Tighten to 30 N·m (24 ft. lbs.) torque. Overflow Valve Removal The overflow valve (pressure relief valve) is located at the outside of fuel injection pump. It connects the fuel return line (banjo fitting) to the pump. The overflow valve has no internally serviceable parts and must be replaced as an assembly. Two sealing gaskets are used. One gasket is located between pump and banjo fitting. The other is located between the banjo fitting and end of the valve. 1. Clean area around overflow valve and fuel return line at injection pump before removal. 2. Remove valve from pump and banjo fitting. 3. Discard old sealing gaskets. Overflow Valve Installation The overflow valve (pressure relief valve) is located at the outside of fuel injection pump. It connects the fuel return line (banjo fitting) to the pump. The valve has no internally serviceable parts and must be replaced as an assembly. Two sealing gaskets are used. One gasket is located between pump and banjo fitting. The other is located between the banjo fitting and end of the valve. 1. Install new sealing gaskets to valve. 2. Install valve through banjo fitting and into the pump. 3. Tighten to 30 N·m (24 ft. lbs.) torque. Few notes... Here is a close up of the bleed hole in the overflow valve. This picture is magnified X10 so you can even see the tiny hole used to bleed air from the system. There is a lot of controversy about the operation of the overflow valve on a Bosch VP44 injection pump Cummins selected. From my personal opinion that the overflow valve is the last check valve to hold the pressure up to 14 PSI for the injection pump. As for the bleed hole in the side that hole is so small, it can't possibly create enough flow to aid in cooling the Bosch VP44 injection pump unless the overflow valve is opened which listed above requires 14 PSI to be open.
  2. I'll start this out by saying that the other week I installed gauges (Boost and EGT). I was told that for my truck with whats done to it I should be able to make 35psi boost easy but the most I've seen is 28psi and that was accelerating up a hill giving it all its got in 4th gear. So I decided to check for boost leaks. Tonight I did a pressure check at 6psi and all the intercooler boots and everything seemed fine. Then I noticed the oil dipstick was hissing a little so I take it out and the air is somehow leaking in and coming out there. Would this happen because I did the pressure check wrong? Are you supposed to block off the one end of the intake when you check it? Is this happening simply because intake valves are open? Or could there be some other cause?I may sound a bit stupid... but hey, there's no stupid question right? A guys gotta learn sometime.All your advice will be much appreciated!Also one more thing if anyone knows. On the gauge there is an orange wire for the dimmer, but the instructions don't tell you what to hook it up to for it to work. So if anyone could tell me where to hook it up to that would be great.Kinda a long post but hopefully everything is clear for you guys, if not just ask what you want to know.
  3. Been reading up on the problematic OEM lift pump & aftermarket solutions. I have to say I'm a bit confused as to why the aftermarket pumps have a relief valve. I can understand that there needs to be a return to the tank from the lift pump to dump the air that has been removed from the fuel. But doesn't the OEM fuel system have a pressure relief valve that maintains supply pressure, and bleeds the excess into the fuel return line at the injection pump? Also doesn't the excess fuel used to cool the IP? If the pressure relief valve on the LP opens up, what happens to the required extra flow to the IP? Is the OEM pressure relief/return system overwhelmed by the aftermarket pump's flow so it cannot control pressure? So to compensate the aftermarket LP pressure relief is set at a slightly higher value than the OEM system's pressure relief valve, acting like a secondary pressure relief? That set-up may allow all the flow the OEM system can handle but prevent an over pressurization of the IP - just guessing here. I saw a YouTube video Michael made showing a slow flow of fuel running into a bucket out of an open hose. Does that represent the 70% of supply flowing back to the tank? Thanks for your time,Joe in St Louis
  4. Ok folks I need to know if I take the banjo fitting ( return line ) off at the vp and blow air thru it to make sure it's not stopped up , will it hurt anything like crossover tube orings. I just wont to make sure the return to the tank is open. Also will it hurt vp?
  5. Ok Gang... You all have seen the Dodge FSM book minimum pressure of 10 PSI. Well I started to do some thinging and relized even that is too low. Here lets take a look at a pic here... http://forum.mopar1973man.com/attachment.php?attachmentid=878 So now let assume your fuel pressure average is about 12 PSI which is above the 10 PSI minimum pressure. Driving down the highway at 55-65 MPH your going to be flowing at least 2-3 GPH through the pump. But now let add a twist to it. New situation... Going up to Seven Devils Campground its a 17 mile drive up a 1 lane dirt road that is steep. I'm dragging a utility trailer with 2 ATV's. Ok for the sake of the post we'll say the fuel pressure is still 12 PSI. Climbing that grade I'm going to be flowing 7-10 GPH through that pump which is a good thing because the high flow keeps the pump lubed and cooled. But now the weekend is over time to drive home. So on the way down I set the exhaust brake and put it into 2nd gear and let it limp down the rough old trail it take about 45 minutes to 1 hour to return to the highway. So now the whole way down the mountain there is 12 PSI heading into the VP44 and but now your not throttling much if at all coming down the steep grade. So this means there is no flow to the injectors... And the Overflow valve is closed because you need 14 PSI to open it. So basically there is no fuel flow. So now the electronics and the mechanical part start to heat up the stale fuel and break it down. Remember diesel fuel is a very poor lubricant anyways. So now you see this is really easy to burn up or damage a injection pump. Now I'm starting to suggest 14-15 PSI as a minimum pressure and 20 PSI as a maximum pressure. This now keeps the overflow valve open and the fuel flowing through the pump while its spining and keeping the VP44 electronics cooled... Any thought on this???
×
×
  • Create New...