Car engine damage whilst in garage

vaio

mattyprice4004 wrote: »

You're wrong.

You CAN run a turbo diesel with no turbo connected, just take the exhaust and inlet manifolds off.

It won't sound pretty, but it'd run.

yep, or less messy/noisy, just pop one of the pressurised air pipes off.

Engine will run as normally aspirated, turbo will spin due to exhaust flow but will just vent to atmosphere.

ECU will see engine running but no boost pressure and log error codes, flash lights at you & probably limit engine speed/power

C_Mababejive

Gawd...who'd have one of these modern cars? arent they supposed to be finely made German Engineering which lasts for years and is a pleasure and pride to own or has all that gone out the window now? Surely they should design in protection mechanisms to stop engines blowing themselves to pieces in this manner?

mattyprice4004

tedted wrote: »

yes you can but what is the point with the amount of work involved,it is not a 1 hour to do this.if you removed the turbo it will apparent if it has a fault.injectors and high pressure pumps do not fail together just trying an engine but on a runaway they can as there is no governor controlling engine speed

There's usually 8-10 bolts on the exhaust manifold, and they're not normally too hard to get to.

If they are hard to get to, then pull the boost hoses as above.

It'd be daft to replace everything to find the engine is creamed.

vaio

C_Mababejive wrote: »

Gawd...who'd have one of these modern cars? arent they supposed to be finely made German Engineering which lasts for years and is a pleasure and pride to own or has all that gone out the window now? Surely they should design in protection mechanisms to stop engines blowing themselves to pieces in this manner?

They do have lots of protective systems but if a turbo oil seal (or piston rings) fails then engine oil gets into the combustion chamber which acts like fuel and the engine runs away and revs to ridiculously high speeds.

The only way to stop it is to either block the inlet to cut off the air getting in or mechanically stall it using gear box & brakes.

mattyprice4004

C_Mababejive wrote: »

Gawd...who'd have one of these modern cars? arent they supposed to be finely made German Engineering which lasts for years and is a pleasure and pride to own or has all that gone out the window now? Surely they should design in protection mechanisms to stop engines blowing themselves to pieces in this manner?

Awesome isn't it - for example BMW sold Rover a load of their 'fantastic' M47 diesel engines in down-tuned form.

This involved using a 'dumb' inlet manifold with no swirl flaps, and a non-VNT turbo.

Amusing that what kills all the BMW engines is the crap VNT turbo and the dodgy flaps in the inlet manifold - in the Rover use they don't give issue and do 300k+ in taxis.

Just noticed the thread is about the 320d - what year is it?
Welcome to technological advancement. Great isn't it

motorguy

tedted wrote: »

i think the garage told you porkies to start with as on these engines you just cant bypass the turbo,the damage was there to start with and they where just chancing it hoping there wasnt damage

^^

This

I reckon they've chanced their arm and said it was running fine, and now have got caught out.

jtm07

It is an2005 plate. The engine didn't burn up the sump oil as I stopped it before it did. Both the recovery mechanic and the garage have verified this. I just think they should have done some initial checks befor they started it. Besides the injectors whils possibly a bit fragile couldn't have been physically broken at the time as it wouldn't have run okay as they put it. Thanks for all the input.

GolfBravo

mattyprice4004 wrote: »

Awesome isn't it - for example BMW sold Rover a load of their 'fantastic' M47 diesel engines in down-tuned form.

This involved using a 'dumb' inlet manifold with no swirl flaps, and a non-VNT turbo.

Amusing that what kills all the BMW engines is the crap VNT turbo and the dodgy flaps in the inlet manifold - in the Rover use they don't give issue and do 300k+ in taxis.

Just noticed the thread is about the 320d - what year is it?
Welcome to technological advancement. Great isn't it

M47 2007 replacement, N47, is even more full of surprises and technological advancement.

Enter the new space-saving timing chain at the back of the engine - this usually starts to make noise from around 40-60K miles, and to get access to it you need to remove:
- bottom engine cover
- oil sump
- fuel injectors
- valve cover
- starter motor
- exhaust
- driveshaft
- transmission
- clutch
- DMF
14+ hours labour = £££££

But hey, at least the car gets a low profile bonnet!

epninety

vaio wrote: »

did you not see this bit in the OP?

Assuming you were replying to me Vaio, I saw and read it just fine, thanks.
My comments stand.

Splott

mattyprice4004 wrote: »

You're wrong.

You CAN run a turbo diesel with no turbo connected, just take the exhaust and inlet manifolds off.

It won't sound pretty, but it'd run.

And what about the oil which is shooting out of the feed pipe at a ridiculous rate of knots or don't turbos have oil feeds in your world?