why is my Toyota Highlander Third Generation (2014-2019) engine making a ticking noise?

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

590 words

Problem Statement

Learn how to diagnose and fix engine ticking noise in 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

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

Symptoms

•Ticking noise coming from the engine, particularly at idle or during acceleration
•Decreased engine performance or power
•Check engine light illuminated
•Engine misfire or rough running condition
•Increased engine oil consumption

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any potential engine faults.
2
Check engine oil level and condition; low or dirty oil can lead to ticking noises.
3
Inspect the valve cover for leaks or damage that could affect the timing components.
4
Perform a visual inspection of the timing chain or belt for wear or damage.
5
Listen with a mechanic's stethoscope to pinpoint the source of the ticking noise.
6
Inspect the fuel injectors for irregular operation or excessive noise.

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
•Mechanic's stethoscope
•Socket set
•Torque wrench
•Oil filter wrench

Parts Required

•Engine oil (0W-20)
•Oil filter
•Valve cover gasket (if replaced)
•Timing chain/belt (if required)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any potential engine faults.
2
Check engine oil level and condition; low or dirty oil can lead to ticking noises.
3
Inspect the valve cover for leaks or damage that could affect the timing components.
4
Perform a visual inspection of the timing chain or belt for wear or damage.
5
Listen with a mechanic's stethoscope to pinpoint the source of the ticking noise.
6
Inspect the fuel injectors for irregular operation or excessive noise.

Solution

1. Preparation

Tools Required: OBD-II scanner, mechanic's stethoscope, socket set, torque wrench, engine oil, oil filter.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent any electrical issues during service.

2. Check and Change Engine Oil

Sub-steps:
1. Using the socket set, remove the oil drain plug and allow the old oil to drain completely into a pan.
2. Replace the oil filter using an oil filter wrench. Ensure the rubber O-ring on the old filter comes off with it.
3. Install the new oil filter by hand tightening it, then use the wrench for an additional 3/4 turn.
4. Reinstall the drain plug, torque it to the manufacturer’s specifications (typically around 25 ft-lbs).
5. Refill the engine with the recommended oil type (typically 0W-20 for this model) through the oil filler cap.

3. Inspect Valve Train Components

Sub-steps:
1. Remove the valve cover using the socket set, taking care not to damage the gasket.
2. Inspect the rocker arms, push rods, and lifters for wear or damage.
3. Replace any worn components as necessary; ensure to lubricate new parts before installation.
4. Reinstall the valve cover with a new gasket, tightening bolts to the recommended torque (usually around 7 ft-lbs).

4. Check Timing Chain/Belt

Sub-steps:
1. If the ticking noise persists, remove the timing cover (if applicable) to inspect the timing chain or belt.
2. Check for any slack or wear in the chain/belt and the tensioner.
3. Replace the timing chain/belt if it shows signs of wear or if the tensioner is faulty.