What is an oil cooler?
An oil cooler is essential if you want to keep your engine’s lubrication and cooling systems functioning properly.
An oil cooler is a secondary radiator, smaller than the main one, responsible for maintaining the engine's oil supply at a consistent and optimal temperature. Its primary function is to cool the oil as it passes through the coils, enhancing the engine's longevity and improving the transmission's performance. These coolers are typically located in front of the engine's primary cooling system.
What are the symptoms of a bad oil cooler?
Routine oil changes can keep you one step ahead of a defective oil cooler, but here are some of the common symptoms that you might need an oil cooler replacement:
Engine power loss or misfiring due to oil contamination
Rises in engine coolant temperature
Discharges of dark exhaust (this is unburned oil released as part of the ignition cycle)
How often do you need to replace an oil cooler?
While an oil cooler should last you the lifespan of your car, they can start malfunctioning after several years (or once you reach and exceed 100,000 miles).
Pro tip: Failure to perform regular oil changes throughout your car’s lifespan can lead to oil cooler failure around 50,000 miles, necessitating a replacement. When it comes to keeping your engine oil as clean and productive as possible, the best mechanics recommend you change your oil anywhere from 3,000 to 3,500 miles (sometimes longer for synthetic oil).
Is replacing an oil cooler yourself easy?
You should not attempt to replace an oil cooler yourself unless you’re very experienced in DIY auto repair. Trying to perform this repair without the proper knowledge and tools often exacerbates the issue and causes further complications.
For the average car owner, it’s best to let a certified mechanic diagnose and fix the problem.