Engine blown

[Tom199230]

Audi q5 2009 injector and Alternator and auxiliary belt work gone wrong
Hi all so I had a injector go on my audi q5 2.0 tdi Diesel 2009 and had a mechanic to put a new injector in it and a Alternator and auxiliary belt so after the work be done I take it for a drive did about 2miles than Start it to make A loud tapping noise so get hold of mechanic and he's said get it home than he will come and have a look at it so start my journey again but before I get back home properly done 5/6 miles a Warning light saying oil too hot pull over turn engine off before I Even had the chance too Pullover a big bang and engine cuts out so gets out car oil everywhere he comes and has a look the pistol has cracked and put a hole in the block Either on chamber 3 or 4 now what I need to no is how dose a piston just do that and if the mechanic Fault it didn't that or is just bad luck thanks and he did injector 4

Edited by Tom199230 on Friday 13th January 19:06

Edited by Tom199230 on Saturday 14th January 08:40

Edited by Tom199230 on Saturday 14th January 08:40

[stevieturbo]

That's a hard read.

And too vague of information to determine anything.

[Jordie Barretts sock]

I'd say incredibly bad luck. UNLESS the wrong injector was fitted and had something to do with it. An alternator and auxiliary drive belt are unlikely to have any affect on the mechanism of the engine. Alternator or auxiliary belt failure are going to bring in a charge light, power steering failure and unlikely to create the problems you suggest. But, I am open to correction.

[Peugeot man]

I'd be inclined to think either exceptionally bad luck or possibly your mechanic has inadvertently dropped a foreign object down the injector hole which had been pinging around the combustion chamber creating a knock before perhaps becoming lodged somehow causing the piston to jam and break. Not sure if that would explain the oil overheating but speaking from bitter experience that would be my guess.

[Thats What She Said]

Unlikely to be related to the new alternator or aux belt.

I'd be focusing my questions to him on the injector replacement. If he changed injector number 4, and piston 4 has let go, it could point to that injector.

- Was it running smoothly from the start or only on 3 cylinders
- Was it a new injector or refurb
- Did he code in the injector

If the injector he replaced was faulty, and wasnt fueling, it could have cooked that cylinder.

You would have noticed the car wasnt running right when you started it. Did you just jump in after he'd finished, noticed it wasnt running right, and give it an Italian tune up hoping it would clear itself?

It's going to need a replacement engine.

[Tom199230]

Thats What She Said said:

Unlikely to be related to the new alternator or aux belt.

I'd be focusing my questions to him on the injector replacement. If he changed injector number 4, and piston 4 has let go, it could point to that injector.

- Was it running smoothly from the start or only on 3 cylinders
- Was it a new injector or refurb
- Did he code in the injector

If the injector he replaced was faulty, and wasnt fueling, it could have cooked that cylinder.

You would have noticed the car wasnt running right when you started it. Did you just jump in after he'd finished, noticed it wasnt running right, and give it an Italian tune up hoping it would clear itself?

It's going to need a replacement engine.

It was a new injector not sure if he coded it or no When started It was a bit Judder like it wanted more fuel but was told a good drive would sort it I'm going have a look at it myself this afternoon to see if the injector he put in is the same as the others

[nickfrog]

Surely the mechanic should have done those first 2 miles upon completion of the work. Perhaps he did...

[dingg]

Mechanic worked on injector 4, cylinder 4 conrod put a hole in the block.?

You don't need to be Sherlock Holmes.....

[stevieturbo]

dingg said:

Mechanic worked on injector 4, cylinder 4 conrod put a hole in the block.?

You don't need to be Sherlock Holmes.....

Given the vagueness of the information, Chinese whispers and general misinformation....Sherlock Homes is long dead. That is factual, everything else here....maybe not so much

[stevemcs]

When you say mechanic …. Do you mean a mobile mechanic or a garage ?

Why was number 4 injector replaced in the first place ? You may find the damage had already been done.

[Tom199230]

Iv just been out to check the injector codes and the one the mechanic has put In has a different code to the rest so I Believe hes put the wrong injector in

[Tom199230]

stevemcs said:

When you say mechanic …. Do you mean a mobile mechanic or a garage ?

Why was number 4 injector replaced in the first place ? You may find the damage had already been done.

Yes a mobile mechanic and it was replaced as it Car stalled and was making a ticking sound and put on Diagnostics and could see that injector 4 was not working properly
When the work was completed no ticking just run lumpy which he say a drive will sort it out

Edited by Tom199230 on Sunday 15th January 12:39

[stevemcs]

Have you still got the old injector ? It might be worth sending it off for testing. If it was dead electronically fair enough but if it had decided to turn itself into a pressure washer the damage was already done. It’s always best to understand why they have failed - you will also find it’s very rarely one injector they normally end up using all 4

I would expect them to fit the injector, code the injector, clear all fault codes, carry out at least a 10 mile road test and then rescan for faults before signing the job off. I’m sure they are out there but I’ve yet to meet a decent mobile mechanic.

[Jordie Barretts sock]

I'd agree Steve.

I've had an injection go down on a Renault 1.5dci. Polish injection guy said I should replace all four. I decided one at £250 was enough, plus the engine was at 200k miles. Second injector went recently, replaced that alone at 220k.

In both examples there was never any road test. But there was also never any rough running "that just needed a few miles to sort out".

They either fire on all 4 or not.

[stevemcs]

Agreed, sometimes it’s not cost effective to swap all 4.

[Tom199230]

stevemcs said:

Have you still got the old injector ? It might be worth sending it off for testing. If it was dead electronically fair enough but if it had decided to turn itself into a pressure washer the damage was already done. It’s always best to understand why they have failed - you will also find it’s very rarely one injector they normally end up using all 4

I would expect them to fit the injector, code the injector, clear all fault codes, carry out at least a 10 mile road test and then rescan for faults before signing the job off. I’m sure they are out there but I’ve yet to meet a decent mobile mechanic.

No haven't got the old injector as the mechanic took it with him as he Supplied and fitted the parts

[Dave.]

You diagnosed it yourself? What with?

Did you just ring him and tell him inj 4 needed replacing?

Part numbers will differ as parts are constantly being revised, as long as the specs are the same, it’ll be the correct one.

[Tom199230]

Dave. said:

You diagnosed it yourself? What with?

Did you just ring him and tell him inj 4 needed replacing?

Part numbers will differ as parts are constantly being revised, as long as the specs are the same, it’ll be the correct one.

No the mechanic came out Diagnostic the problem told me what i need when off order the parts than come back like a weeks later and fit the parts

[stevemcs]

Out of interest, why did you use a mobile mechanic and not a garage ?

[GreenV8S]

Massive overfuelling might cause mechanical damage eventually. If that was due to the wrong spec injector being fitted you would have proof.

You mentioned that you don't have the original injector because he supplied and fitted the new one. The injector he removed was still your property.