Should you use an OE temperature thermostat or alternate in a 1987 Ford Ranger with 2.9L engine?

For a 1987 Ford Ranger with a 2.9L engine, it's strongly recommended to use an OE (Original Equipment) temperature thermostat. While aftermarket thermostats might seem cheaper, they can vary significantly in quality and accuracy. An inaccurate thermostat can lead to overheating, poor fuel economy, and even engine damage.

The 2.9L engine in that year Ranger is relatively simple, and using the correct OE thermostat ensures proper cooling system operation. The cost savings of an aftermarket thermostat are usually not worth the potential risks. A faulty aftermarket thermostat could easily cost more to repair in the long run than the price difference.