Dashboard

Dashboard

Note: Your are not logged in. We can not keep your scores or track your progress unless you Register and Log In

2.14 – Driving in Very Hot Weather

2.14.1 – Vehicle Checks

Do a normal pre-trip inspection, but pay special attention to the following items:

Tires. Check the tire mounting and air pressure. Inspect the tires every two hours or every 100 miles when driving in very hot weather. Air pressure increases with temperature. Do not let air out or the pressure will be too low when the tires cool off. If a tire is too hot to touch, remain stopped until the tire cools off. Otherwise, the tire may blow out or catch fire.

Engine Oil. The engine oil helps keep the engine cool, as well as lubricating it. Make sure there is enough engine oil. If you have an oil temperature gauge, make sure the temperature is within the proper range while you are driving.

Engine Coolant. Before starting out, make sure the engine cooling system has enough water and antifreeze according to the engine manufacturer's directions. (Antifreeze helps the engine under hot conditions and cold conditions.) When driving, check the water temperature or coolant temperature gauge from time to time. Make sure that it remains in the normal range. If the gauge goes above the highest safe temperature, there may be something wrong that could lead to engine failure and possibly fire. Stop driving as soon as safely possible and try to find out what is wrong.

Some vehicles have sight glasses, see-through coolant overflow containers or coolant recovery containers. These permit you to check the coolant level while the engine is hot. If the container is not part of the pressurized system, the cap can be safely removed and coolant added even when the engine is at operating temperature.

Never remove the radiator cap or any part of the pressurized system until the system has cooled. Steam and boiling water can spray under pressure and cause severe burns. If you can touch the radiator cap with your bare hand, it is probably cool enough to open.

If coolant has to be added to a system without a recovery tank or overflow tank, follow these steps:

  • Shut engine off.
  • Wait until engine has cooled.
  • Protect hands (use gloves or a thick cloth).
  • Turn radiator cap slowly to the first stop, which releases the pressure seal.
  • Step back while pressure is released from cooling system.
  • When all pressure has been released, press down on the cap and turn it further to remove it.
  • Visually check level of coolant and add more coolant if necessary.
  • Replace cap and turn all the way to the closed position.

Engine Belts. Learn how to check V-belt tightness on your vehicle by pressing on the belts. Loose belts will not turn the water pump and/or fan properly. This will result in overheating. Also, check belts for cracking or other signs of wear.

Hoses. Make sure coolant hoses are in good condition. A broken hose while driving can lead to engine failure and even fire.

2.14.2 – Driving In Very Hot Weather

Watch for Bleeding Tar. Tar in the road pavement frequently rises to the surface in very hot weather. Spots where tar “bleeds” to the surface are very slippery.

Go Slowly Enough to Prevent Overheating. High speeds create more heat for tires and the engine. In desert conditions the heat may build up to where it is dangerous. The heat will increase chances of tire failure or even fire and engine failure.

Multiple-Choice Questions:

Question #130 (1 of 2)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

If the coolant recovery container is not part of the pressurized system:

  • Never try to add coolant to any cooling system when the engine is hot, regardless of the type of coolant recovery container
  • The cap can be safely removed and coolant added even when the engine is at operating temperature
  • The radiator cap is more prone to leakage in this type of system, so check it often
  • The operating temperature in this type of system will be higher than in most

Some vehicles have sight glasses, see-through coolant overflow containers or coolant recovery containers. These permit you to check the coolant level while the engine is hot. If the container is not part of the pressurized system, the cap can be safely removed and coolant added even when the engine is at operating temperature.

I believe almost all modern tractor-trailers have a coolant recovery tank that is not part of the pressurized system. You can safely add coolant to the recovery tank even when the engine is running or is at operating temperature.
Next
Question #128 (2 of 2)

Give a brief explanation of the problem:

Optional: Leave your email address if you would like a reply:

Report Cancel

When driving in hot weather you must check the tires:

  • Tires can handle the heat just fine. No need to make extra checks.
  • Every two hours or every 100 miles
  • Only when you stop
  • Every four hours or every 250 miles

Tires. Check the tire mounting and air pressure. Inspect the tires every two hours or every 100 miles when driving in very hot weather. Air pressure increases with temperature. Do not let air out or the pressure will be too low when the tires cool off. If a tire is too hot to touch, remain stopped until the tire cools off. Otherwise, the tire may blow out or catch fire.

Previous Next

Why Join Trucking Truth?

We have an awesome set of tools that will help you understand the trucking industry and prepare for a great start to your trucking career. Not only that, but everything we offer here at TruckingTruth is 100% free - no strings attached! Sign up now and get instant access to our member's section:
High Road Training Program Logo
  • The High Road Training Program
  • The High Road Article Series
  • The Friendliest Trucker's Forum Ever!
  • Email Updates When New Articles Are Posted

Apply For Paid CDL Training Through TruckingTruth

Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Seriously! The application only takes one minute. You will speak with recruiters today. There is no obligation whatsoever. Learn more and apply here:

Apply For Paid CDL Training