If you own a truck with a DD 15 engine, you may have encountered the problem of low oil pressure or a check engine light. This can be a serious issue that can damage your engine and cost you a lot of money. In this article, we will explain what causes the oil pressure issue, how to diagnose it, and how to fix it.
What causes the oil pressure issue?
The oil pressure issue is caused by a faulty oil suction module or oil pickup tube. This is the part that draws oil from the oil pan and delivers it to the oil pump. The oil suction module has two tubes that connect to the oil pan, and each tube has an o-ring seal that prevents oil leakage. Over time, these o-rings can wear out, harden, or crack, allowing air to enter the oil system and reducing the oil pressure.
How to diagnose the oil pressure issue?
The first sign of the oil pressure issue is a check engine light or a low oil pressure warning on your dashboard. You may also notice that the oil pressure gauge fluctuates or drops when you rev the engine. To confirm the diagnosis, you need to inspect the oil suction module and the tubes. To do this, you need to remove the oil pan and locate the oil suction module underneath the engine. If you can spin the tubes freely by hand, that means the o-rings are bad and need to be replaced. You can also check for any signs of oil leakage or damage on the tubes and the oil suction module.
How to fix the oil pressure issue?
To fix the oil pressure issue, you need to replace the oil suction module and the o-rings on the tubes. There are two types of oil suction modules for the DD 15 engine, depending on the year and the VIN number of your truck. You need to make sure you get the right one for your truck. You also need to replace the oil pan gasket and the grommets on the oil pan bolts, as they can also affect the oil pressure.
The process of replacing the oil suction module is not very complicated, but it requires some tools and skills. You need to drain the oil, remove the oil pan, disconnect the tubes from the oil suction module, remove the old oil suction module, install the new one, reconnect the tubes, reinstall the oil pan, and refill the oil. You can follow the instructions in the manual or watch a video tutorial online. Alternatively, you can take your truck to a mechanic and have them do it for you.