my Toyota Corolla E170 (2013-2019) emits smoke from the exhaust what's wrong

Toyota Corolla E170 (2013-2019)

Error Codes

4-8 hours

Time

hard

Difficulty

high

Severity

3 min read

565 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 smoke emissions from the exhaust in a 2013-2019 Toyota Corolla E170. 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 to avoid burns.

Symptoms

•Blue or gray smoke from the exhaust
•Reduced engine performance
•Unusual engine noises (ticking or knocking)
•Increased oil consumption
•Smell of burnt oil or fuel

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the oil level and condition, looking for signs of contamination or excessive consumption.
3
Check the coolant level and look for signs of oil mixed with coolant (indicating a head gasket failure).
4
Perform a compression test on the engine cylinders to assess internal sealing integrity.
5
Inspect the PCV (Positive Crankcase Ventilation) system for blockages or malfunctions.
6
Check for any fuel leaks or signs of excess fuel in the combustion chamber.

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
•Torque wrench
•Compression tester
•Oil catch pan

Parts Required

•Valve cover gasket
•Head gasket
•Piston rings (if necessary)
•PCV valve (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the oil level and condition, looking for signs of contamination or excessive consumption.
3
Check the coolant level and look for signs of oil mixed with coolant (indicating a head gasket failure).
4
Perform a compression test on the engine cylinders to assess internal sealing integrity.
5
Inspect the PCV (Positive Crankcase Ventilation) system for blockages or malfunctions.
6
Check for any fuel leaks or signs of excess fuel in the combustion chamber.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a flat surface and disconnect the battery to ensure safety.
Allow the engine to cool before starting work.

2. Addressing Oil Consumption

Remove the valve cover:
- Use a socket set to remove the bolts securing the valve cover.
- Carefully lift the valve cover off and inspect the gasket; replace if necessary.
Replace piston rings (if necessary):
- Drain the engine oil and remove the oil pan.
- Remove the cylinder head to access the pistons.
- Replace the piston rings and reassemble the engine, ensuring proper torque specifications are followed (refer to repair manual for specific torque values).

3. Fixing Head Gasket Issues

Remove the head:
- Follow the procedure for removing the cylinder head, taking care to label all components.
- Inspect the head gasket for signs of damage; replace it if necessary.
Reassemble:
- Clean all mating surfaces thoroughly.
- Install a new head gasket and reattach the cylinder head, following torque specifications carefully.
- Reassemble the rest of the engine components.

4. PCV System Inspection

Check and replace the PCV valve:
- Locate the PCV valve (typically on the valve cover).
- Remove the valve and inspect for blockages; replace if it is faulty.

5. Final Assembly and Testing

Reinstall the oil pan, valve cover, and any other components removed during disassembly.
Refill engine oil and coolant as required.
Reconnect the battery.