3.0 TDI Glow Plug Issue

AU11 ALS

AU11 ALS

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Having had the car serviced on Thursday recommended work was replace glow plugs as 3 out of the 6 were throwing up error codes.

Audi wanted £310 to complete the work so I declined and asked SCC to complete as I was using them for a Revo stage 1 map today. Unfortunately when removing they have found that one has snapped and is not turning the lower half and therefore stuck, so we stopped work. They've advised likely resolve is the head will need removing to get them out

Anyone able to offer any recommendations, I'm guessing this is going to be expensive....

The car is covered by a third party warranty, is this even remotely likely to be covered?

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TBH I wouldn't do anything with it. The car can have several faulty glow plugs and no CEL will be raised and the owner will notice no issue. Change the other 5 plugs and hopefully they will come out OK. You need to make sure the engine is hot before you try and remove the plug to reduce the chance of the plug snapping. Some times the plugs just don't want to come out. It is possible to try and remove the plug remanents and replace the plug without removing the head there are specialist tools available for doing this.
If you remove the head apart from the cost you leave yourself open to all kinds of potential issues.
With 5 working glow plugs the engine will have no issues starting or running in any conditions. If you were check 10 3.0 TDI engines of a similar age/ mileage I bet you would find more than 50% of them with 1 or more duff plugs.
 
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There's a tool for removing broken glow plugs, there's a chap on the estate where i work with one & he's often round at other mechanics workshops removing them, no need to remove the head.
 
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audi upgrades
I'm feeling slightly less down about things now thank you guys!


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desertstorm said:
TBH I wouldn't do anything with it. The car can have several faulty glow plugs and no CEL will be raised and the owner will notice no issue. Change the other 5 plugs and hopefully they will come out OK. You need to make sure the engine is hot before you try and remove the plug to reduce the chance of the plug snapping. Some times the plugs just don't want to come out. It is possible to try and remove the plug remanents and replace the plug without removing the head there are specialist tools available for doing this.
If you remove the head apart from the cost you leave yourself open to all kinds of potential issues.
With 5 working glow plugs the engine will have no issues starting or running in any conditions. If you were check 10 3.0 TDI engines of a similar age/ mileage I bet you would find more than 50% of them with 1 or more duff plugs.
Click to expand...
I agree with all above, I have the same engine and had a couple of glow plugs showing faults on vagcom.
Purchased two new ones from the stealers (around £20 each)
A good tip should you wish to replace any of the others is to remove electrical connector from the glow plug and drip some diesel down the tube and leave overnight, mine then came out without any risk of snapping.
A friend of mine has the same engine with 4 glow plugs not working and it still starts ok.
 
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Hello !
I have a Audi A4 b7 2.7tdi v6 car was ruining perfect till tonight on route home, my glow plug ligh started flashing losses of power fells like the turbo switched off for safety mode, when a restart the car everything works great for few minutes then after few minutes same problem Am definitely sure that the turbo isn't blowing or smoking, what could it be can any one help me thank you. Forgot to say I changed my air filter from the standard one to a KNM air filter could that be the problem, should I changed it back to the original one ?
 
Hi,
You need to check the car for fault codes. It could be several things more than likely a duff sensor maybe an EGT sensor or MAP sensor. A boost leak is also a possible cause. The air filter shouldn't have made much difference unless you have knocked or left loose a connection such as the MAF sensor.
 
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Stifler1929 said:
Hello !
I have a Audi A4 b7 2.7tdi v6 car was ruining perfect till tonight on route home, my glow plug ligh started flashing losses of power fells like the turbo switched off for safety mode, when a restart the car everything works great for few minutes then after few minutes same problem Am definitely sure that the turbo isn't blowing or smoking, what could it be can any one help me thank you. Forgot to say I changed my air filter from the standard one to a KNM air filter could that be the problem, should I changed it back to the original one ?
Click to expand...
Where do you live?
I could scan your car with vcds if your not too far away.
Dave
 
I
desertstorm said:
Hi,
You need to check the car for fault codes. It could be several things more than likely a duff sensor maybe an EGT sensor or MAP sensor. A boost leak is also a possible cause. The air filter shouldn't have made much difference unless you have knocked or left loose a connection such as the MAF sensor.
Click to expand...
I checked my glow plug today 2 are out going to but new ones tomorrow could that be the problem ?
 
I have told you what you need to do, It could be an expensive game changing all the parts that could be causing an issue one at a time until you change the correct part. And there are several things that could cause the issue you have.Get the fault codes read and then come back. If you have an Android phone you can use a cheap £5 blue tooth dongle and an app such as Carista to read and clear fault codes.
 
desertstorm said:
I have told you what you need to do, It could be an expensive game changing all the parts that could be causing an issue one at a time until you change the correct part. And there are several things that could cause the issue you have.Get the fault codes read and then come back. If you have an Android phone you can use a cheap £5 blue tooth dongle and an app such as Carista to read and clear fault codes.
Click to expand...
Says it's the air flow
 
If the car is going into limp mode it usually does that to protect the engine as the ECU is seeing an issue. Could be a Mass air flow issue or EGR problem , possibly a boost leak or the DPF pressure sensor is a common problem. Did the garage charge you for reading the fault codes as they haven't told you much.
 
desertstorm said:
If the car is going into limp mode it usually does that to protect the engine as the ECU is seeing an issue. Could be a Mass air flow issue or EGR problem , possibly a boost leak or the DPF pressure sensor is a common problem. Did the garage charge you for reading the fault codes as they haven't told you much.
Click to expand...
Okay mate no they never charged me told me they couldn't do the proper one couse the computer was broke :/ can a still drive the car ? Am going to take it to a different garage on Monday
 
I would drive it only as far as you have to get it to a garage, without knowing what the issue is it's hard to say more.
 
Got the car checked the day it's the dpf filter I put some dpf cleaner inside and white smoke was coming oot then a toke it on the motorway doing speed of 70mph in 3 gear revs were just under 4rpm the car has got more power now and when a stop and turn it over and back on the glow plug light doesn't come one straight away like it used to, it takes much longer to come back on but it does what else can I do so it goes 100% away ?
 
Stifler1929 said:
Got the car checked the day it's the dpf filter I put some dpf cleaner inside and white smoke was coming oot then a toke it on the motorway doing speed of 70mph in 3 gear revs were just under 4rpm the car has got more power now and when a stop and turn it over and back on the glow plug light doesn't come one straight away like it used to, it takes much longer to come back on but it does what else can I do so it goes 100% away ?
Click to expand...

Find someone with VAG-COM / VCDS and do a forced regeneration. That will also allow you to read the "Particle Filter Load Coefficient" and you can monitor it during the forced DPF regen until it gets down to an acceptable level.

I had this same issue on my B7 A4 2.0TDI. All started from an EGR failure which then lead to the DPF getting a bit clogged and the car went into limp mode, etc ,etc until I replaced the EGR & finally did the forced regen with VCDS. if I were closer I would have offered, but I'm over in the NE Scotland, so a good few hours drive away.
 
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