why does my Volkswagen Golf MK7 (2015-2019) make a whirring noise when starting

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

509 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 whirring noise during engine start in Volkswagen Golf MK7 (2015-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.
•Allow the engine to cool before working on any components related to the starter or battery.

Symptoms

•Whirring noise when turning the ignition key
•Difficulty in starting the engine
•Rapid clicking sound after attempting to start
•Dashboard lights dimming during the start attempt
•Engine cranks slowly or not at all

Diagnostic Steps

1
Check battery voltage using a multimeter; it should read around 12.6 volts or higher.
2
Inspect battery terminals for corrosion and ensure they are tight and clean.
3
Test the starter motor by checking for voltage at the starter solenoid during crank.
4
Listen for any unusual noises from the starter while attempting to start the engine.
5
Inspect the ignition switch for proper function and continuity.
6
Check the condition of the starter relay and fuses associated with the starting system.

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

•Multimeter
•Wire brush
•Wrench set
•Socket set
•Screwdriver set
•Battery jumper cables

Parts Required

•New battery (if required)
•New starter motor (if required)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check battery voltage using a multimeter; it should read around 12.6 volts or higher.
2
Inspect battery terminals for corrosion and ensure they are tight and clean.
3
Test the starter motor by checking for voltage at the starter solenoid during crank.
4
Listen for any unusual noises from the starter while attempting to start the engine.
5
Inspect the ignition switch for proper function and continuity.
6
Check the condition of the starter relay and fuses associated with the starting system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface, and engage the parking brake.
Disconnect the negative battery terminal to avoid electrical shock.

2. Battery Inspection

Sub-steps:
1. Clean any corrosion from the battery terminals using a wire brush.
2. Tighten the battery terminals securely.
3. If the battery voltage is below 12.6 volts, replace the battery with a compatible one (e.g., Group 48).

Tools Required:

Multimeter
Wire brush
Wrench set

3. Starter Motor Inspection

Sub-steps:
1. Remove the starter motor by disconnecting the electrical connectors and removing the mounting bolts.
2. Inspect the starter motor for wear or damage; check the gear for free movement.
3. Test the starter motor by connecting it directly to a fully charged battery to see if it spins properly.
4. If faulty, replace the starter motor with a new one (ensure replacement is compatible with MK7).

Tools Required:

Socket set
Screwdriver set
Battery jumper cables (for testing starter)

4. Reassembly

Sub-steps:
1. Reinstall the starter motor, ensuring all connections are secure.
2. Reconnect the battery terminals, starting with the positive terminal followed by the negative.
3. Start the engine to verify the issue is resolved.