Turbo Repairs

Turbo Turbo Problems

Dpf Removal
Turbo Repairs
Most Bmw models seem to suffer from form turbo problems at some point, the problem seems to range from the Bmw 320d to the Bmw 330d ,, Bmw X5 and also the smaller Bmw X3. The main cause of Bmw turbo failure is the condition of the engine oil. A diesel engine will produce a lot of soot like gases which make there way into the oil via the piston rings in the engine. Theses gases are vented back into the engines induction system via the crankcase breathing system, so in theory they never stay in the crankcase long enough to contaminate the oil. But unforantley this causes a small problem as this process occurs constantly when the engine is running and eventually engine the oil gets contaminated to the point where it can no longer lubricate the turbo. Once this happens then the bearings in the turbo start breaking apart which causes the compressor blades to spin of center, this will cause the turbo to whistle and eventulay break appart. Bmw 330d and Bmw 520d suffer from this problem a lot and its always good to repair it once you here the turbo whistle.

Bmw engines from the Bmw 320d to the mighty Bmw X5 have a crankcase breather filter which is located on the top of the engines rocker cover, this filter allows the crankcase gases to flow into the induction system. A common problem with the Bmw breather filter is they can block up and cause a build up of crankcase pressure to exit through the turbo, once this happens then its only a mater of time before the turbo on your Bmw will fail.

The Ford Focus C max tdci is fitted with a 16 HDI engine, this engine suffers badly from turbo problems and has a serious oil sludging problem. When you combine this with poor servicing then you cause an oil circulation problem, this is the main cause of turbo failure on Ford Focus tdci. The turbo needs a constant oil supply at engine oil pressure to keep the bearings lubricated, the oil must also get through the turbo and circulate back round the engine. If the oil supply to the turbo is interrupted for any time then the bearings in the turbo will fail and the turbo will shake it self to bits. Replacing the turbo is simply not enough on the Ford Focus 1.6 tdci, the only way out of this problem is by doing the following. Remove oil sump from bottom of engine, wash it out and thoroughly dry it, replace the main oil pick up pipe which bolts onto the bottom of the oil pump, there is a wire mesh type filter inside the pick up pipe which can get blocked very easily, refit the sump. Replace the oil feed pipes and oil return pipes going to the turbo as they are probably blocked up with gunge, remove all breather pipes and clean them out, replace all crankcase breather filters, they are normally on top of the rocker cover or on the air box. Remove and clean out the oil filter housing, refit it and fit a new oil filter, fill the engine with oil, start it up and run it at idle for 20 mins, then take it for a drive until the smoke clears. I have also encountered turbo problems with the Ford S Max 1.8 tdci, they don't seem to have the same oil circulation problems as the 1.6 tdci engine but it seems that the variable vanes in the turbo stick quite often which causes a fault with the electronic actuator. If the variable vanes stick then it also causes damage to the turbine inside the turbo so unfortunately the turbo will need completely rebuilt.

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Peugeot 307, 207, 407 1.6 hdi suffer badly from turbo problems and has a serious oil sludging problem, the 1.6 hdi engine produce a lot of soot like gases which make there way into the oil via the piston rings in the engine, this will eventually contaminate the oil to the point where it can no longer lubricate the turbo. Replacing the turbo is simply not enough on the Peugeot 307, 207, 407 1.6 hdi the only way out of this problem is to carry out the following. Remove oil sump from bottom of engine, wash it out and thoroughly dry it, replace the main oil pick up pipe which bolts onto the bottom of the oil pump, there is a wire mesh type filter inside the pick up pipe which can get blocked very easily, refit the sump. Fit new oil feed pipes and oil return pipes going to the turbo as they are probably blocked up with gunge, remove all breather pipes and clean them out, replace all crankcase breather filters, they are normally on top of the rocker cover or on the air box. Remove and clean out the oil filter housing, refit it and fit a new oil filter, fill the engine with oil, start it up and run it at idle for 30 mins, then take it for a drive until the smoke clears.

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The Renault Scenic Megane and Laguna 1.5 and 1.9 dci can suffer from turbo problems, one of the main causes is blocked engine breathers. A diesel engine will produce a lot of soot like gases which make there way into the oil via the piston rings in the engine, these gases are vented back into the engines induction system via the crankcase breathing system. This process occurs constantly when the engine is running and eventually the oil gets contaminated and turns to a carbon type substance, once this happens then it will block crankcase breathing pipes. When the crankcase breathing system blocks then the engine will try and breath through the turbo which of course will blow the turbo.

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Mazda 6 2.2 diesel suffer form a bit more than turbo problems, the Mazda 6 2.2 diesel engine suffer from premature engine failure. The problem starts with combustion gas blowing past the injector seals, the combustion gas mixes with the engine oil and forms small carbon deposits which cling to areas in the crankcase. One of the most dangerous areas the small carbon deposits can cling is the wire filter goze located on the bottom of the oil pump, if this filter gets 50% blocked, and the oil in the engine is mixture of diesel and engine oil due to the Dpf, then your Mazda 6 2.2 diesel is very close to complete engine failure. Unfortunately this Mazda 2.2 diesel engine problem stretches to the Mazda 3 2.2 and Mazda CX7 2.2 to view more on this problem click the link below and watch the video.

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VW Skoda Audi 1.9 and 2.0 Litre TDI seem to very sensitive to limp mode. Limp mode seems to be coded into the ECU and can not be removed, so the only conclusion is to fix the cause of your limp mode problem. VW Skoda and Audi tdi Limp mode is like a safety device which controls the amount of power the engine will produce, this is normally activated if the ECU detects an over boost of pressure from the turbo. The turbo is driven by the exhaust gases which pass through variable vanes then out the exhaust, the other side of the turbo compresses the air being drawn in by the induction of the engine via the compressor blades and into the engine. Once the induction pressure in the inlet manifold reaches a certain pressure which is detected by the map sensor, the ECU will start controlling the amount the variable vanes are opened via a vacuum actuator. Variable vanes act as a waste gate to control the amount of exhaust gas spinning the turbo, when the vanes are open the turbo will spin fully which will allow the turbo to reach maximum boost pressure, once this is achieved the ECU will close the vanes slightly to reduce the amount of boost from the compressor side of the turbo.

For the variable vanes to experience full range of movement the engine must experience the full rev range for the turbo to boost fully there for allowing the variable vanes to close for a few seconds, to achieve this you must drive your car aggressively making the turbo work hard, this should be done once per week. If you never do this then the variable vanes will start to stick due to a build up of exhaust carbon in one place because the variable vanes have not experienced the full range of movement.

Once the variable vanes stick on your VW Skoda or Audi tdi then they can not close when the pressure in the inlet manifold reaches maximum boost pressure, the ECU will detect an over boost from the turbo and limp mode is activated. The cause of the variable vanes sticking is a build up of exhaust carbon between each vane, the only way to free them is to remove the turbo and send to a turbo repair specialist who will strip the turbo down and replace the variable vanes, and it is always a good idea to give the turbo an overhaul while its removed from the vehicle.

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Dpf Removal Video Peugeot, Citroen, Ford, Mazda, dpf Remap.


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