12 valve 5.9 cummins rear main seal install

How to Install a Rear Main Seal on a 12 Valve 5.9L Cummins

The rear main seal installation is a crucial process that requires careful attention to detail and the right tools. In this article, we will guide you through the steps involved in installing a new rear main seal on your 12 valve 5.9L Cummins engine.

Before starting the project, it's essential to understand the importance of proper seal installation. A faulty rear main seal can cause oil leaks, which can lead to premature wear and tear on other engine components. Therefore, it's crucial to ensure that the new seal is installed correctly to prevent any issues.

To begin with, you'll need to locate the rear main seal housing on your engine. This housing is usually located at the back of the engine, near the transmission bellhousing. You'll see a large rubber boot surrounding the crankshaft seal area. This boot houses the rear main seal.

Next, you'll need to remove any debris or contaminants that may be present in the seal housing. Use a clean cloth to wipe down the area and ensure it's free from dirt and grime.

Once the area is clean, you can begin removing the old seal. Use a screwdriver or pliers to carefully pry out the seal from its housing. Be gentle, as the seal may still be attached to the engine block.

With the old seal removed, you can now install the new one. Apply a thin layer of silicone-based lubricant to the seal and gently push it into place. Make sure it's seated properly in its housing and not twisted or misaligned.

Next, use a seal installer tool (available at most auto parts stores) to ensure the seal is properly seated. This tool will help you apply even pressure to the seal as you install it.

Once the new seal is installed, apply a thin layer of silicone-based lubricant around its edges to prevent any future leaks. You can also use a small amount of RTV (room temperature vulcanizing) sealant to further secure the seal in place.

Finally, reassemble the engine and check for any signs of oil leakage. If you notice any leaks, you may need to reseat the seal or adjust it slightly.

In conclusion, installing a rear main seal on your 12 valve 5.9L Cummins engine is a relatively straightforward process that requires attention to detail and the right tools. By following these steps, you can ensure a proper seal installation and prevent any future issues with oil leaks or premature wear on other engine components.

Remember to always consult your vehicle's repair manual for specific instructions and guidelines for your particular make and model. Additionally, if you're not comfortable with this type of project, it's recommended that you seek the assistance of a professional mechanic or diesel specialist.

12 valve 5.9 cummins rear main seal install