Turbocharger installation

If the exhaust system has been checked and is okay, there could be several other reasons why the car is making a dark noise. One possibility is a problem with the turbocharger or the intake system. Another possibility is a problem with the engine itself, such as worn bearings or a damaged piston. It may be necessary to have the car inspected by a mechanic in order to determine the exact cause of the noise.

There are several possible reasons why the turbo on your 2002 Golf TDI might not be engaging:

1. Boost pressure issue: The most common cause of a non-engaging turbo is a boost pressure issue. This can be caused by a leak in the intake system, a damaged turbocharger, or a clogged air filter.
2. Malfunctioning wastegate: The wastegate is a component that controls the amount of exhaust gas that flows through the turbocharger. If the wastegate is malfunctioning, it may not allow the turbo to engage properly.
3. Faulty turbocharger control solenoid: The turbocharger control solenoid is responsible for regulating the amount of pressure that goes to the turbocharger. If the solenoid is faulty, it may not be able to control the pressure properly, leading to a non-engaging turbo.
4. Electrical issue: There may be an issue with the electrical components of the turbo system, such as a faulty wiring harness, sensor or control module.

To diagnose the problem, you can check for any visible leaks in the intake system or damage to the turbocharger. You can also check the wastegate for proper function and inspect the turbocharger control solenoid for any signs of damage or failure. If you are unsure how to perform these checks, it is recommended to take your vehicle to a qualified mechanic for a proper diagnosis and repair.

Trouble Code: P1557

Charge Pressure Control Positive Deviation

Possible Causes:


Charge air system leaks.Recirculating valve for turbocharger is faulty.Turbocharging system is damaged.Vacuum diaphragm for turbocharger needs adjusting.Wastegate bypass regulator valve is faulty.ECM has failed.Here's the causes for the code.

Hello there and welcome to fixya

Turbocharger problems are some of the most difficult to troubleshoot. The main purpose of the turbocharger is to provide more air to the engine. The more air going into the engine the more fuel that can be burned, which results in an increase in horsepower. There are four main parts of the turbocharger: the wastegate, center rotating assembly, turbine housing and the compressor housing. By understanding how the turbocharger functions, it is possible to uncover the causes of problems.
Difficulty:Moderate Instructions

1. • 1 Check the air filter element as this is a main cause of blue exhaust smoke. This blue smoke occurs when there is not enough air going into the engine. Check all ducts and pipes for obstruction or leaks.
     
   • 2 Clean the turbocharger. Dirt that has caked onto the compressor wheel or the diffuser vanes can cause all types of problems. If the turbocharger is very dirty or the center housing contains sludge then you should also check the filters. Dirt coming in to the turbocharger is most likely due to broken filters.
     
   • 3 Check with the engine manual to ensure that the camshaft or pump is working at the correct timing. Adjustments may need to be made as the turbocharger can change over time. If the turbocharger is out of sync, then this will result in a noticeable decrease in engine power. An additional cause of decreased power is a gas leak in the exhaust manifold or the turbine outlet duct. The less gas the less power that is produced.
     
   • 4 Check the turbine blade and compressor for any damage such as indentations or notches. This type of damage will cause screeching noises, whining noises, rattling and scraping sounds. You will need to replace the turbocharger as well as locate the source of the damage to prevent further damage. There is a chance that the noises are due to other eternal components and not the turbocharger, but a visual inspection is easy to check before moving onto other components.
     
   • 5 Inspect the actuator if the entire turbocharger is frequently overboosting or underboosting. Make sure that the actuator is not loose and if so tighten it to the specified torque values. If there is visible damage to the actuator and air leak or if the actuator spring has broken a new actuator is needed.
     

Hello dedime,
Removal

1. Remove the nuts and bolt attaching the top of the strut assembly to the body.

2. Raise and support the vehicle. Refer to Vehicle Lifting.

3. Place jack stands under the front cross member.

4. Lower the vehicle slightly so that the weight of vehicle rests on the jack stands and not on the control arms.

Notice: Care must be exercised to prevent the drive axle joints from being over-extended. When either end of the shaft is disconnected, over-extension of the joint could result in separation of the internal components and possible joint failure. Drive axle joint boot protectors should be used any time service is performed on or near the drive axles. Failure to observe this can result in interior joint or boot damage and possible joint failure.

5. Remove the tire and wheel assembly.

6. Remove the brake line bracket.

7. Scribe the strut flange.

Important: The steering knuckle must be supported in order to prevent axle joint over-extension.

8. Remove the bolts and the nuts attaching the strut to the steering knuckle.

Notice: Care should be taken to avoid scratching or cracking the spring coating when handling the front suspension coil spring. Damage can cause premature failure.

9. Remove the strut from the Vehicle.

Installation Procedure

Notice: Care should be taken to avoid scratching or cracking the spring coating when handling the front suspension coil spring. Damage can cause premature failure.

1. Install the strut into position and install the nuts and one bolt connecting the strut to the body. Hand tighten the nuts and the bolt.

2. Align the steering knuckle with the strut flange scribe mark and install the bolts and nuts. Tighten the nuts to 180 Nm (133 ft. lbs.).

3. Tighten the nuts and bolt attaching the top of the strut to the body. Tighten the nuts to 25 Nm (18 ft. lbs.).

Tighten the bolt to 25 Nm (18 ft. lbs.).

4. Install the brake line bracket.

5. Install the tire and wheel assembly.

6. Inspect the front wheel alignment.

Regards,

netvan