Changing Fuel Filter On Ram 2500 Diesel: Step-By-Step Guide

Changing the fuel filter on a Ram 2500 diesel truck is a straightforward process that can be done at home with relative ease. There are two fuel filters that need to be replaced: one mounted on the left side of the engine and one that is frame-mounted. The process involves unscrewing the filter housing with a socket wrench and replacing the old filters with new ones. It is important to note that there are different socket sizes required for different models, with some requiring a 28mm socket and others a 29mm socket. Additionally, it is recommended to prime the filters before starting the truck to ensure proper functioning. While it may take some time and effort, changing the fuel filter on a Ram 2500 diesel truck can be a cost-effective alternative to taking it to a mechanic.

The front filter is located on the left side of the engine

To change the front filter, you will need a 28mm or 29mm socket, a ratchet with a swivel attachment, and a 10-inch extension. You may also need a long extension, a U-joint, and a 6-point socket. There is also a large electrical plug above the filter cap that you can remove to make more room.

Make sure the old gasket comes off, and make sure the new gasket is seated correctly when you put it back on. You may also want to replace the plastic cap with a metal one, as the plastic one is prone to breaking.

The front filter has a drain tube that you can put a container under to collect the fuel. Be careful not to get any fuel on the forward canister O-ring or it will leak.

The rear filter is located above the drive shaft

The rear fuel filter is located above the drive shaft. This means that changing it can be a bit of a hassle, as you will need to fit a bucket or container above the drive shaft to catch the drained fuel. You will need to be careful with the drain valve, as the plastic is thin and can snap if you tighten it too much.

To access the rear filter, you will need to crawl under the truck. This can be a tight fit and a bit uncomfortable, so make sure you have enough clearance and that you are wearing appropriate clothing. Be careful with the weights on the driveshaft, as they are sharp.

When changing the rear fuel filter, it is important to prime the fuel system before starting the engine. This is done by turning the key to the "on" position for 15 seconds, then turning it off for 5 seconds, and repeating this cycle at least 6 times. This will help to ensure that any air in the fuel system is removed and that the engine starts properly.

Overall, changing the rear fuel filter on a Ram 2500 Diesel is a fairly straightforward process, but it requires careful attention to detail and can be physically demanding due to the location of the filter.

You will need a 28mm or 29mm socket

To change the fuel filter on a Ram 2500 diesel, you will need a 28mm or 29mm socket. This socket size is specific to the plastic cap on the engine-mounted fuel filter. It is important to get the correct socket size to avoid stripping the plastic cap. A 6-point socket is recommended for a more secure grip.

In addition to the socket, you will also need a ratchet with a swivel attachment and long extensions. A minimum of a 12-inch extension is suggested, with some recommending an even longer extension of up to 2 feet. This is to reach the engine-mounted fuel filter, which is located in a tight space. A u-joint may also be needed to get the ratchet high enough to reach the cap.

When working on the engine-mounted fuel filter, be cautious not to get any fuel on the forward canister o-ring, as it may cause leaks. Ensure that the old gasket is removed and the new filter is seated correctly before tightening. It is also important to prime the fuel filters before starting the engine.

The frame-mounted fuel filter is located above the driveshaft and can be accessed with a strap wrench. Be careful with the drain valve on this filter, as the plastic is thin and can snap if over-tightened.

Drain the filters before replacing them

It is important to relieve the pressure in your vehicle's fuel system before you drain the filters. This can be done by removing the fuel pump relay in the fuse box, which is usually under the hood or on the firewall inside the cabin. Check your owner's manual to locate the fuse box. Once the relay is removed, start the engine and let it idle until it stalls. After the engine stalls, crank it for another 5 seconds to release the remaining fuel pressure.

Next, disconnect the cable from the car battery's negative terminal. If you want to be extra cautious, you can also disconnect the positive terminal. Place a drain pan under the fuel filter to catch any fuel spillage. Some vehicles will leak continuously until everything is reconnected, so be prepared for this.

Now, you can begin to drain the filters. Use a screwdriver to detach the fuel line hose clips, being careful not to kink the fuel lines as this could cause leaks later. Loosen the fuel filter clamp and then disconnect the fuel line fittings. The fuel filter can now be removed.

It is worth noting that diesel fuel systems are under a lot of pressure, and accidentally releasing this pressure could result in injury. Therefore, it is crucial to take your time and follow the correct procedure when draining and replacing the fuel filters.

Prime the filters before starting the engine

Before starting the engine, it is essential to prime the filters. This process ensures that the filters are filled with fuel and any air is removed from the fuel system. Here is a step-by-step guide on how to prime the filters in your Ram 2500 Diesel:

• Turn the key to the 'on' position, without turning the engine over.
• Let the lift pump fill the filters with fuel for about 15 seconds.
• Turn the key off for 5 seconds.
• Repeat this process at least six times: turn the key on for 15 seconds, then off for 5 seconds.
• After priming, start the engine as normal and let it idle for a few minutes.
• Drive the truck slowly for a while. The engine may be hard to start and run very rough initially as the air is purged from the fuel system.

It is important to remember to close the drains and prime the fuel filters before attempting to start the engine after changing the filters. This will help avoid issues with the truck not turning over or cranking.

Additionally, when draining the filters, you can use tubing to aid in the process and minimise the mess. For the front filter, there is a drain tube where you can attach a container to collect the fuel. The rear filter also has a small drain plug that can be used.

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