Oil leak 5.9 cummins rear main seal install#

Even with a distributor it was rare and when it has happened to me, it was just misfires, open up the effected areas and let it dry out for a couple of hours then it ran like normal. Now with Distributor-Less Ignition (DIS) that happens even less.

Oil leak 5.9 cummins rear main seal install#

Make sure the install spacer is included so the new seal is set to the correct depth. The risk of washing out the engine is water in the ignition. The gasket that comes with the seal is for the back side of the plate around the seal (if it's leaking, but it's not necessary to remove this plate to replace the rear main seal). 340 33 AL Specs and brochures Range: 5889914 - 0D715493 Rear Main Seal Style 8. With a shiny clean engine, that you check after each drive, its a lot easier to spot leaks at their source instead of their end-point. The oil is Amsoil 15W-40 Marine Synthetic Oil not Amsoil 10w-30 that is. It always help to thoroughly clean the engine, like spray it down with Simple Green or another De-Greaser, even scrub built up deposits with a brush and hose it completely, then let dry. Pretty much what IC and others said before, I had to add the collecting and dripping from the lowest point, to make sure if you hadn't consider it yet, you would. So, its easy to mistake the point where leaking fluid is collecting and dripping from as the source of the leak itself, when in reality it could be somewhere else because you're missing the clues. Often the lowest point on the engine/trans is the bottom of the bellhousing (becoming less and less so in more modern designs). The rear cam journal soft plug at the rear of the block is less common, but still a possibility.Īny leaking fluid 'tends' to pool at the lowest point, and then drip off from there.

The intake manifold rear gasket is also common. The oil sender from up top next to the distributor is a common leaker. Oil will tend to leak downwards from gravity and rearwards from road draft. Of course with a lot of miles, anything is possible. Scheid said to use a 2.375'' freeze plug. Every time a Cummins o-ring was used and all types of rtv was tried and it still leaks. Many oil leaks can look like a rear main leak and it is usually the first thing people think of, but in the big picture, it isn't all that common. The problem is the rectangular o-ring that fits in the recessed groove of the adapter plate doesn't seem like it's thick enough to seal. Interdynamics Oil and Fuel Systems UV Dye (1 oz.) 374CS: Advance Auto Partsīe careful in diagnosing a suspect rear main leak. If the oil is too clean to see the definite leak source or leak drip/spray pattern, a UV dye and light can help make it more visible.

Does the flex plate appear to be flinging the oil around the inside of the bell-housing? The rear main seal service procedure is shown on p. Study the 'Rear seal area leaks-Inspection' procedures on p.