Part 1 – How to Replace Engine Oil Cooler Coolant Lines


The Ford Truck engine oil cooler coolant lines help to stabilize the temperature of the engine oil. After the vehicle has been driven around for a few years these lines can get damaged and cause leaks. Although you can pay a professional to replace the cooler coolant lines on your truck, you can accomplish this task on your own if your keep a few tools and materials handy and meticulously follow the guidelines given below. You will also learn how to protect these lines from further wear and tear.

Tools Needed Include:

  • 3 quarter inch heater hose (4 feet)
  • Clear one inch hose (2 feet)
  • Hose clamps
  • Silicone grease
  • Cable ties
  • Needle nose pliers
  • Diagonal cutters
  • Knife
  • Hose pinch off pliers
  • Flathead screwdriver
  • Tape measure
  • Paint marker
  • Drain pan
  • Jack and jack stands
  • Antifreeze coolant 
  • Rags or paper towels

Replacing Engine Oil Cooler Coolant Lines:

Step 1

After you’ve gathered all the tools and materials you require to complete the task, you need to make sure that the engine has completely cooled down. To find out the temperature of the engine you will have to turn on the ignition and make note of the temperature gauge reading.

Step 2

Once this is done, set your parking brake and raise the vehicle with a jack. Secure the vehicle in place with the help of the jack stands. Always consider working in a well lit area on a flat surface. Also give yourself plenty of space to move in and around the vehicle when carrying out any vehicle repairs. Subsequently, raise the hood of the vehicle and slowly pull out the jack.

Step 3

Next, grab hold of the hose clamp pliers and start installing them on the radiator hose of the truck. Look for the clamps that hold the coolant lines in place and remove them with the help of the cutters. Once these clamps have been broken, simply slide them down the cooler lines.

Step 4

Since the antifreeze will start dripping once you remove the coolant line clamps, put your drain pan under the truck to collect the antifreeze that falls.

Step 5

You now have to turn the coolant lines in an anti clockwise direction to detach the lines. After you’ve detached the coolant lines, remove the clamps that are on them with the help of the clamp pliers.

Step 6

Try to remove the oil lines out and away from the vehicle without cutting the lines. Lines that are partly made of rubber are easier to remove.

Step 7

After the hoses are removed, measure them with the tape measure in order to cut the new hoses to the right length. Next, place the newly cut hoses right next to the old hoses and mark the areas that were damaged on the old hoses. Use these as a guide to mark areas on the new hoses that may be susceptible to wear and tear in the future.

Step 8

Use clear plastic tubing to cover these areas of the coolant lines that are susceptible to damage. Secure them in place with the help of zip ties.

Step 9

Fit the new coolant lines back into place and tighten the bolts that secure the liner couplers to the terminals.

Step 10

Replace any parts that were previously removed and refill the antifreeze solution that has leaked out.

Wipe off any excess oil or coolant that may have escaped and safely lower the vehicle to its normal height.

This step by step procedure is ideal for the replacement of oil coolant lines present on the Ford Super Duty Modular V-8 and V 10 engines. If you carry out these preventive maintenance tasks periodically, your vehicle will remain in optimal working condition and you won’t end up paying a huge sum of money on expensive repairs.

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