Archived Tech Tip: 05/05/06

Hot Weather Driving

Air temperatures in the triple digits can multiply the amount of heat generated by pavement under your RV. During hot weather driving, pay close attention to how the heat is affecting your vehicle.

Perform a close inspection of the engine, including belts and hoses. Have all suspected problems promptly repaired. Keep charge air cooler fins clear to promote airflow. If necessary, drive at a reduced speed to avoid taxing the engine. When you come to a stop, allow the engine a few moments cooling time before turning the ignition off.

Tires are more susceptible to problems during hot weather driving. A combination of the heat, load and distance traveled puts stress on the tires. Be sure each tire is at proper inflation as calculated from the actual loaded weight of the vehicle. Avoid overloading the vehicle and only drive on tires with adequate tread. Following these simple guidelines will make tires less likely to fail in hot weather.

When climbing long hills, throttle the engine at a slow, steady rate. As you descend down the other side, shift into a lower gear and use the engine brake to provide a controlled speed. Engage the foot brake sparingly to avoid overheating the brakes.

Turn off overhead lights and pull day/night shades to prevent direct light from shining into the interior. Keep extra disinfectant in holding tanks to reduce odor.

Use the dash a/c to cool down the cockpit. Securely latching the bathroom and bedroom pocket doors can further help to keep cool air up in front. If your dash is equipped with a fan normally used to remove windshield condensation, this can help to also circulate cool air. When dash a/c cooling is inadequate, turn on the ceiling air conditioning, but remember to engage the generator to power the load.

Keep an eye on the dash for indicators alerting you of impending engine problems. Watch coolant levels. If gauges rise, turn down the a/c to draw heat away from the engine. If temperatures continue to climb, pull safely off the highway and turn off the engine. Do not remove coolant caps and risk scalding from steam. Wait for the engine to cool down, and if levels are still too high, seek the assistance of roadside service.

Take the opportunity to make periodic stops to cool down the RV. Use the stop to perform a quick inspection of the tires and tow car. Open the battery compartment to allow cooling while the RV is stopped. Avoid leaving a pet unattended inside a hot vehicle. If you plan to be away for a short while, engage the air conditioner, put down fresh cool water, and periodically check on the pet.