why is my Tesla Outback 5th Generation (2015-2019) burning oil excessively

Subaru Outback 5th Generation (2015-2019)

Error Codes

4-8 hours

Time

hard

Difficulty

high

Severity

3 min read

521 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix excessive oil consumption in Tesla Outback 2015-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

4-8 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening any components.

Symptoms

•Increased oil consumption detectable between oil changes
•Blue smoke from the exhaust during acceleration or startup
•Engine knocking or tapping noises
•Oil spots on the ground beneath the vehicle
•Check engine light illuminated (specific codes related to oil consumption may be present)

Diagnostic Steps

1
Check the oil level on the dipstick to confirm low oil levels.
2
Inspect for visible leaks under the vehicle or around engine components.
3
Use an OBD-II scanner to check for any related error codes.
4
Perform a compression test on the engine cylinders to assess engine health.
5
Check the condition of the PCV (Positive Crankcase Ventilation) system for blockages or malfunctions.
6
Inspect the condition of the piston rings and valve seals through a visual inspection or further disassembly if necessary.

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
•Compression tester
•Socket set
•Pliers
•Engine hoist

Parts Required

•New PCV valve
•New piston rings (if applicable)
•Engine oil (recommended type)

Related Faults

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Diagnostic Steps

1
Check the oil level on the dipstick to confirm low oil levels.
2
Inspect for visible leaks under the vehicle or around engine components.
3
Use an OBD-II scanner to check for any related error codes.
4
Perform a compression test on the engine cylinders to assess engine health.
5
Check the condition of the PCV (Positive Crankcase Ventilation) system for blockages or malfunctions.
6
Inspect the condition of the piston rings and valve seals through a visual inspection or further disassembly if necessary.

Solution

1. Preparation

Gather tools and parts to perform the repair.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace PCV System

Tools Required: Pliers, sockets, and a new PCV valve.
Remove the PCV valve from the engine by disconnecting any hoses attached to it.
Inspect the old PCV valve for clogs or damage; replace it with a new valve if necessary.
Reattach the hoses securely and ensure all connections are tight.

3. Perform Compression Test

Tools Required: Compression tester.
Remove the spark plugs to prevent engine flooding.
Insert the compression tester in one cylinder at a time and crank the engine.
Record the compression readings and compare them to manufacturer specifications to identify any weak cylinders.

4. Inspect and Replace Piston Rings (if necessary)

Tools Required: Engine hoist, socket set, ring compressor, and new piston rings.
Disassemble the engine to access the pistons, including removing the cylinder head and oil pan.
Remove the pistons from the engine block and replace the old piston rings with new ones.
Reassemble the engine, ensuring all components are torqued to manufacturer specifications.

5. Verification

Check oil levels and top off if necessary after repairs.
Start the engine and monitor for blue smoke emissions.
Perform a test drive to confirm normal engine operation and oil consumption.
Re-scan for any error codes to ensure no new codes have appeared.