12 valve 5.9 cummins rear main seal install

12 Valve 5.9 Cummins Rear Main Seal Install

When it comes to upgrading your RV's engine, there are several options available. One popular choice is swapping out the existing gas engine for a diesel engine. In this article, we'll take a look at the process of installing a rear main seal on a 12 valve 5.9 Cummins engine.

The first step in the installation process is to prepare the area where you will be working. This includes clearing away any debris or obstructions that may be in the way of your work. It's also important to make sure that you have all of the necessary tools and parts before starting the project.

Once you have prepared the area, you can begin by removing the old rear main seal. To do this, you will need to use a wrench or socket to loosen the bolts that hold the seal in place. Once the bolts are loose, you should be able to remove the old seal easily.

Next, you will need to install the new rear main seal. This is done by simply sliding the new seal into place and securing it with the same bolts that held the old seal in place. Make sure that the new seal is properly seated and that all of the bolts are tightened securely.

After installing the new rear main seal, you should check the area around the seal to make sure that there are no leaks. This can be done by using a drip pan or other type of containment device to catch any fluid that may leak out during the test run.

Finally, you can start up the engine and take it for a test drive to make sure that everything is working properly. If you notice any leaks or other issues during the test drive, you should stop immediately and check the seal again to make sure that it is properly installed.

Overall, installing a rear main seal on a 12 valve 5.9 Cummins engine is a relatively simple process that can be completed with basic tools and knowledge of automotive mechanics. However, it's always a good idea to consult the owner's manual or seek the advice of a professional mechanic if you are unsure about any part of the process.

Additionally, a Gear Vendors overdrive will be mounted directly to the rear flange on the 4wd transmission with an adapter from Gear Vendors that replaces the transfer case. This is because the 12 valve 5.9 Cummins diesel operates in a much lower rpm band than typical RV gas engines and really needs more gears to be effective. The transmission used for this project is a diesel specific A518 out of a 1992 Dodge 4wd with a Cummins, which has a non-intercooled version that will be added an intercooler due to the heavy-duty use it will see.

12 valve 5.9 cummins rear main seal install