Hemi Fuel Pressure Relief: Dodge's Secret Valve?

The fuel system design is the limiting factor in Hemi engines. While a bigger pump can be installed, it creates problems. The factory regulator is a calculated bleed hole, so a bigger pump will throw off that calculation. This can lead to higher base pressure, making the car run rich and causing issues with idle tuning. The jet pump on the passenger side also has a small, inefficient filter that is not E85-friendly and will break down faster. To address these issues, some people go full return to get pressure down, keep fuel cooler, and prolong pump life, while also bypassing the factory filter and adding a FORE filter for injector protection. Tapped Performance offers a special double hat with a single 267 or 274 pump that is a drop-in replacement, providing a wiring kit and retaining returnless operation. For more power and safe fueling, a full return system with an additional pump may be necessary.

Where is the Schrader valve on a 2011 Dodge Ram 1500 Hemi?

The 2011 Dodge Ram 1500 Hemi does not have a fuel pressure test port. To conduct a fuel pressure test, the fuel line must be removed from the rail and a special hose attached between the line and rail, which contains a test port for the gauge to connect to.

The Schrader valve on a 2011 Dodge Ram 1500 Hemi is located on the fuel rail next to the valve cover on the top, driver's side. However, it is important to note that the 1997 model with the plastic fuel rail does not have a pressure test port.

Where is the oil pressure relief valve on a Dodge Ram 1500?

The oil pressure relief valve on a Dodge Ram 1500 is located in the oil pump assembly, which is bolted to the front of the engine block. To access the valve, you will need to remove the front cover, timing chains, oil pan, and pickup tube. It is important to note that the service information cautions against taking the oil pump apart, as it may need to be replaced if disassembled.

The oil pressure relief valve plays a crucial role in maintaining adequate oil pressure in your engine. If the oil pressure relief valve becomes stuck or malfunctions, it can cause low oil pressure, particularly at idle. This can result in illumination of the oil pressure warning light and potential engine damage if left unchecked.

If you are experiencing low oil pressure or oil pressure warning lights, it is recommended to verify the oil level and check the pressure with a mechanical gauge. If the oil level is adequate and low pressure is confirmed, the issue may lie with the oil pressure relief valve. In such cases, disassembling and cleaning the relief valve may be necessary to resolve the problem.

It is always a good idea to refer to the specific service manual for your Dodge Ram 1500 model and consult a qualified mechanic for accurate diagnosis and repair recommendations.

Where is the rollover valve on a Dodge fuel pump?

The rollover valve is located at the top of the fuel tank in a Dodge vehicle. It is part of the fuel pump module and is necessary for helping with emissions and fuel tank filling.

If you are having trouble locating the rollover valve, it may be held in place with a rubber grommet. It is also worth noting that a new fuel pump from a Dodge dealership may come with a rollover valve included.

If you are still having trouble locating the rollover valve on your Dodge fuel pump, it is recommended that you consult a qualified mechanic or a Dodge specialist for further assistance.

Does the Hemi have an oil pressure relief valve?

Yes, the Hemi has an oil pressure relief valve. It is located in the oil pump assembly, which is bolted to the front of the engine block. To access the oil pressure relief valve, you need to remove the front cover, timing chains, oil pan, and pickup tube.

The oil pump assembly is labelled as #8 in the attached picture. The service manual cautions that once the oil pressure relief valve, cup plug, and pin are removed, the entire pump assembly must be replaced. This is likely because the oil pump is difficult to disassemble and there is no breakdown of its parts in the service manual.

It is important to note that low oil pressure can be caused by a faulty oil pressure sending unit, so it is recommended to verify the pressure with a mechanical gauge before attempting any repairs. The oil pressure specification for the Dodge Ram 1500 4.7L engine is 4 PSI at idle and 25-110 PSI at 3000 RPM.

If the oil pressure relief valve is suspected to be the cause of low oil pressure, it is recommended to seek the assistance of a certified mechanic as accessing and repairing the oil pump assembly can be a complex and time-consuming task.

Where is the oil pump on a Hemi?

The oil pump on a Hemi is bolted to the front of the block. To access it, you will need to remove the front cover, timing chains, oil pan, and pickup tube.

The process is quite involved and will require a lot of work. It is not recommended to take the pump apart, as once the oil pressure relief valve, cup plug, and pin are removed, the pump assembly must be replaced.

The oil pump bolts have a torque spec of 21 ft. lbs. You can access the pump without dropping the oil pan, but you will need to be careful not to lose the pickup tube.

Some people have had issues with the Milodon "Hemi" cover, as it does not clear the factory Hemi mounts. You may need to use a Milodon Wedge cover and a 90-degree fitting to clear the motor mounts.

Frequently asked questions