Bought a Laguna 1.9 dci diesal , approx 18months ago. It has fairly high mileage (149,00) but has got full service history. The problems started when then boost pressure control valve went faulty. The car produced vast amounts of black smoke, wouldn,t switch of, even with key in my hand!! had to stall the vehicle in the end. The conclusion was blown turbo. Removed turbo from vehicle, stripped down, impellor shaft complety shot. Is this a common fault? Is there a modified pressure relief valve available? Where can I get to turbo from? don't want to spend lot of money to get it fixed, coz have decided to get rid of the car, biggest piece of junk have every bought!!
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Although catastrophic turbo failure is a DCi speciality; yours doesn't follow the well-trod path of EGR stuck; over-revved turbo shatters; catastrophic runaway; destroyed engine.
Did you have the MIL light on with an EGR code? Black smoke suggests an EGR issue. Running-on can also be a fuel pressure regulator fault.
Plenty of turbo rebuilders around - not all respectable, but you're selling it anyway. Is it really viable to repair it?
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Recoil from memory had a engine management light come on when driving, then lack of power, followed by excessive revving. When stripped turbo, have had the holes where the shaft would have been welded up. Rebuilt the engine, every thing runs fine. So am happy that no turbo bits made way into intercooler, engine etc. However,loads smoke when rev above 1500rpm, as you would predict. Just want a cheap s/hand turbo to make good a bad job!!!! Have looked but seems have to spend £300 - £400 for a recon unit.
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