Peugot diesel turbo question

They are if they're not treated properly. Does he know how to properly look after a turbocharged car?

It might be something else, like a MAF sensor, or something else, not sure really - could be any number of things with modern electronically controlled commonrail injection systems and all that, but if he's neglected to properly look after the turbo, then it could well be that.

Yes. Especially as clueless owners don't follow the manufacturers instructions to run the engine for a minute before use to allow oil to get to the turbo and idle after for a minute after to allow oil to circulate and cool the turbo.

It might have, but it'd be really gutless without one.

if it has gone he'd be better off getting a recon unit, no help to you but there's a company we use Turbo Dynamics, they recon the old unit at a far better price then a new one would cost. see if you have a local " turbo factor " they might be able to diagnose it before you start ripping things of the vehicle.

Oil circulates through the turbo bearings as soon as the engine starts. The same as it does to all of the other moving parts in the engine. Before switching off the engine should be allowed to idle until the turbo housing and rotors cool, which can take as long as 2-3 minutes if the engine has been driven hard. The oil does keeps the turbo bearing temperature down, but does little to cool the mass of the turbo itself. Most of that cooling comes from the cool air on the intake side of the turbo, the radiator fan, and natural radiation. Switching off while the turbo is still very hot, burns the oil in the bearings. It's the hard burnt crusty oil in the turbo bearings that causes premature turbo failure. Mike.

I have a MK5 Golf turbo and had the MK4 prior to this, I have read the handbooks front to back and neither mention about driving any differently due to the turbo charger, my colleague is a mature sensible guy and he car is serviced regularly , I doubt the car has been abused or thrashed .

Have you read the handbook of a modern Peugeot HDI car then?

DervMan ( snipped-for-privacy@ntlworld.com) gurgled happily, sounding much like they were saying :

Is this an HDi?

Could be a 1.9 or 2.1.

Whether it has been abused or thrashed is irrelelvent. If the turbo has been spinning, that's enough.

Nope.

Well if the turbo wasn't spinning then it would have been pretty pointless!

Correct.

The instructions don't specify a warm up and cooling down period of this magnitude.

Yup, it...

Too.

Exactly. Though I do partly blame the manufacturers for not properly informing people. Cars are used by all sorts of people, not just car enthusiasts or people in the know, and they're not going to know about how to properly treat a turbocharged engine. Manufacturers could save themselves on a hell of a lot of warranty claims.

I'd naturally assumed they did but Dervy put me right. They used to. On new trucks, until a driver rips it off, there's a sticker on the windscreen giving info about this.

The Mondeo handbook simply said words to the effect of just make sure the donk is idling when you shut it down! Erk!

Hmmm. Could be some clever plot to get a bit more repair work in.

I doubt it. Turbochargers on the older generation Mondeo were hard to kill.

Indeed, modern turbodiesel turbochargers are hard to kill full stop, I guess oil quality has improved.

Not impossible mind you.

well, my trusty old 405 GRDT has 183000 on the clock, serviced every 4k miles and the missus starts her up and gives it welly straight away on a 1 mile trip to ASDA, returning 1 hour later. No running for 1 min before use or 1 -2 mins after a run to cool the turbo... never had a prob. Always used good oil and regular servicing, that's my motto!