my Toyota Highlander Third Generation (2014-2019) has a smell of burning oil what should I do

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

560 words

Problem Statement

Learn how to diagnose and fix the burning oil smell in your Toyota Highlander 2014-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool completely before performing any work on it.
•Always dispose of oil and filters properly to avoid environmental harm.

Symptoms

•Burning oil smell, especially after engine operation
•Oil on the ground beneath the vehicle
•Increased engine temperature
•Engine oil level low on the dipstick
•Blue smoke from the exhaust during acceleration

Diagnostic Steps

1
Check the engine oil level using the dipstick to determine if it is low.
2
Inspect the engine and surrounding components for visible oil leaks.
3
Examine the oil filter and drain plug for signs of leakage.
4
Perform a visual inspection of the valve cover gasket for wear or damage.
5
Use an OBD-II scanner to check for any related engine error codes.
6
Inspect the exhaust for blue smoke, which may indicate burning oil.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Oil catch pan
•Oil filter wrench
•Torque wrench
•Rags

Parts Required

•Valve cover gasket
•Oil filter
•Engine oil

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Diagnostic Steps

1
Check the engine oil level using the dipstick to determine if it is low.
2
Inspect the engine and surrounding components for visible oil leaks.
3
Examine the oil filter and drain plug for signs of leakage.
4
Perform a visual inspection of the valve cover gasket for wear or damage.
5
Use an OBD-II scanner to check for any related engine error codes.
6
Inspect the exhaust for blue smoke, which may indicate burning oil.

Solution

1. Preparation

Gather tools such as a socket set, oil catch pan, and rags.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Check and Top Off Engine Oil

Remove the dipstick, wipe it clean, and reinsert it to check the oil level.
If low, add the appropriate type and grade of oil (refer to the owner’s manual).

3. Address Oil Leaks

Valve Cover Gasket Replacement:
- Remove any engine covers obstructing access to the valve cover.
- Unscrew the bolts securing the valve cover and gently lift it off.
- Clean the mating surfaces with a solvent and a clean rag.
- Install a new valve cover gasket, ensuring it is seated correctly.
- Reattach the valve cover and torque the bolts to the manufacturer’s specifications (usually around 8-10 ft-lbs).
Oil Filter Inspection:
- Use an oil filter wrench to remove the old oil filter.
- Inspect the rubber O-ring for damage and replace the filter with a new one, lubricating the O-ring with a bit of fresh oil.
Drain Plug Check:
- If the drain plug is leaking, use a wrench to tighten it. If damaged, replace it with a new one.

4. Clean Up

Use rags to clean any spilled oil from the engine bay and under the vehicle.
Dispose of any used oil and filters in accordance with local regulations.