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Volvo Turbocharger Troubleshooting

Do you need to know the steps to remove a turbocharger from a Volvo V70? Or, need to troubleshoot other related problems being faced? Turbo cars are known for power and ride quality, however, it is not uncommon to face problems with them from time to time. The type of problem or issue you face depends on the condition and maintenance of the car. For those of you who want to troubleshoot Volvo turbocharger problems and need help, verified mechanical Experts are available.

Read below where Experts have answered a few questions for owners like you.

What should be checked on a 2005 Volvo V90 turbocharger if it emits smoke despite a turbo replacement?

There are two important things to check here: first the oil drain return tube could be restricted or the turbo oil return passage in the oil pan could be blocked with sludge. This drain needs to be removed and checked for proper oil return flow especially in the oil pan passage since the oil can bypass the turbocharger seals and leak into the hot or cold side of the turbocharger. The charge air cooler pipe connecting to the throttle body should be removed and inspected for excessive oil. Though it is normal for the intake pipe to be coated with oil, excessive collection in the intake can be due to a defective PCV system.

What could have occurred if a 1999 Volvo S70 turbocharger has lost power and the engine does not start?

Case Details: Oil is all over the hood and the engine only turns over.

Based on the description of the problem, most likely, the turbocharger has blown. When the turbocharger gets damaged, the oil line also breaks and oil can go all over the engine compartment. A blown turbocharger can also cause a ‘no start’ condition as well.

How to remove a turbocharger from a 2000 Volvo V70 XC?

The steps to remove the turbocharger is as follows:

  1. The turbocharger should be loosened.
  2. Next the inlet-coolant pipe should be loosened.
  3. The nuts, turbocharger and exhaust manifold should be removed.
  4. The hoses for the following parts should be loosened:
    1. Charge pressure (red-mark).
    2. Relief valve (white-mark).
    3. Pressure box (yellow-mark). 
  5. Remove the turbocharger.

Why is the 1997 Volvo 850 Station Wagon with turbocharger leaking coolant?

Most likely the heater hose or one of the coolant hoses for the turbocharger is leaking. It could also be the lower radiator hose where it attaches to the engine on the driver’s side, above the transmission. There are a couple of hoses at the passenger side at the reservoir and at the back of the engine, entering the hard metal line that enters the turbocharger. These hoses could be the cause. Ideally, to locate the leak the mechanic should top if off and perform a cooling system pressure test.

How to identify whether the turbo on the Volvo XC90 is the problem and needs to be replaced?

If there is blue smoke coming from the Volvo it is a sign of oil burning. This is a clear indication of a faulty turbo, but could also be leaking valve guides in the cylinder head or a plugged PCV system. To identify whether it is the turbo, the air pipes going into and coming out of each turbo should be inspected for excessive oil. The turbo with excess oil is likely the one at fault. The PCV system should be checked by checking for pressure using the oil dipstick tube when the engine is running. If pressure is present, the PCV breather box, mounted to the engine under the intake should be replaced and the ports should be cleaned. This may not be a common failure, unless the car has not been maintained properly with frequent oil changes. If it has been neglected, depending on the cost of the second turbo, it may be best to replace them simultaneously.

What can be done if the 2011 Volvo XC70 is sluggish from a stop and while turning?

Check the boost pressure with a manual gauge to see if it is slow to build up. Check the Turbocharger Control Valve (TCV) vacuum lines for resistance; the specification is 23 ohms. The TCV should be bench-checked by applying power and ground to it. The boost pressure sensor should also be checked and it is located at the passenger side of the intercooler and sometimes gets damaged due to water intrusion on the connector and sensor. At the boost pressure sensor with the key on engine off, the brown wire should be checked for good ground. The gray wire is for five volt reference and black/green is for two volts at sea level. 

As seen above, different car owners have faced different issues based on the model and mileage of the Volvo turbocharger car. Understanding the root cause or the problematic part is the first step towards successful diagnosis. You need not worry about expensive mechanic visits and bills when you can ask specific questions related to Volvo turbochargers to Experts online. Experts provide useful steps and inputs to address your query from the comfort of your home, in a quick and economical manner.

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