As far as I'm aware the drive wears in the balance shaft causing movement which in turn rounds off the hex.I did mean chain, not belt.
the problems with the balancers is the hex shaft isn't it?
Yes Steve you can convert the unreliable chain driven system to the more reliable gear system. Most cars with engine codes other than BLB should be gear driven anyway, but check by ringing Audi a quoting reg a vin number
You're still not out of the wood as the balance shaft as im sure you've read is still problematic
Audi will not be able to 100% identify which unit one has from the VIN number. Others have tried this and failed ( read this thread if you have the time and inclination )
The ONLY sure way of finding out what you have is to drop the sump.
well got mine fixed by a guy in pontefract, a mate of mine told me about. took the car in to him on a tuesday got a phone off him on the friday its ready to collect, asked him the cost he said are you sitting down yep i said the full cost including VAT is £538, Audi wanted £852.32 for a new pump, £95 per hour labour, + VAT would take approx 10 hours, the problem was the hexagan shaft had worn[/QUOTE
I believe you have forgotten to add that you have had a gear driven balance shaft /oil pump assembly fixed. If it had been a chain driven unit the costs would have been much higher !
Anyhow,a good result for you at a much reduced cost over what others have been charged.
Hi guys
Just had my Balance shaft swapped as the unthinkable happened on New Years Eve. I stopped within a mile of the oil pressure light coming on, but stilled finished off my turbo. The turbo worked (sounded very sick) for one day after the balance shaft was replaced but blew taking most of the oil out of the engine with it.... The Hex key (which was modified by the dealer under warranty) only lasted approx. 50k as you can it was completely round at the end it should have been driving the pump. It was the 75mm one not the newer 100mm length which I guess is part of the problem. I purchased the new balance shaft for £225 (sending my old one back) and the labour was £450 with oil and filter. The AC needed re-gassing. The remanufactured turbo fitted was £500. so all in all it has costed me a just over 1k.
It is quite a job, in my case the dropped the sub-frame to take the sump off and moved the a/c unit. A few garages were not interested after bad experiences (I think to do the modification from the chain is an even bigger job as it needs more parts that will make it more expensive). If you are going to have it inspected i would have the hex or chain replaced at the same time as taking it apart is 3/4 of the job and expense.
The dealer does not even return my calls, I am thinking to taking the case to small claims court. There are so many cases at the moment the modified balance shafts are in short supply. The car is working but i am sure it has done no good to it, but when you look at the second hand prices of my 56 Audi Avant I would not swap it as at least i know my car and it is in good condition with a good spec. One garage told me to scap it...
It is very frustrating that all the expense could have been avoided and down to a bad design. I will just have to hit the brakes the next time the oil light comes on, as you never know when it will go or have a new hex shaft or chain fitted every 50K ish (I even wonder if you should not pay to upgrade the chain to the hex key as I think both are flawed and it may be better to save the conversion cash and just get the chain and drive replaced like the hex). The good news is there are some chaps out there who can help and supply units to get you back on the road, which the dealers are not willing to do unless you have very deep pockets.
I will update if I have anymore news
Am i right in thinking that the dealer just did a bodge job or will the Hex shaft only last 50k?
Even with the new 100mm one fitted will that only last 50k also?
I dont mind getting this upgrade done, but every 50k sounds like madness....
Sorry not been on for a couple of weeks, I am presently commuting between West Yorks and London for a trial.
In the first instance if some units run to 100,000 miles and others fail at 50,000 how is this explained.
I am keen to do this and understand the principle behind the failures, Audi will in the first instance deny it is a design failure, they will simply look world wide at cars for sale and they will find a number of cars with over 100,000 miles on clock manufactured in 2005 and say how can it be a design fault it must be user error, no service or poor driving (not that poor driving can effect it, they may try to argue snatch)
Views ?
Sorry not been on for a couple of weeks, I am presently commuting between West Yorks and London for a trial.
In the first instance if some units run to 100,000 miles and others fail at 50,000 how is this explained.
I am keen to do this and understand the principle behind the failures, Audi will in the first instance deny it is a design failure, they will simply look world wide at cars for sale and they will find a number of cars with over 100,000 miles on clock manufactured in 2005 and say how can it be a design fault it must be user error, no service or poor driving (not that poor driving can effect it, they may try to argue snatch)
Views ?
Completely no help to anyone that has suffered but I know of a BLB engine thats done over 200k without any issues.
So without reading 23 pages.......I have just bought a 2007 A4 170bhp TDi S-Line.....What do i need to check ect to see what i have???
This would be provable tolerance can be measured and evidence given of type of journeys. Court is going to say that it is reasonably foreseeable that cars take short journeys, and tolerance did not allow for wear that would equate to normal life of components.
The chain system, whilst i understand the weakness of a chain and plastic tensioner what causes the failure ?
So you joined a forum you do not want to read
NO, Ive joined a forum to be part of a community, with community spirit.......therefore thought someone may just say..."Cars between xxxx and xxxx are ones to watch".....
Or, just for the sarcasim and wit from a few....... like yourself...
Tolerance levels come from manufacturing process at Audi, it will be written somewhere.
Am I right in thinking the Freedom of Information legislation stems from a European directive? In which case, can we send an FOI to Audi De asking for all their testing paperwork including tech articles?
I like that alot, anyone know about Freedom of Information law ?
I'm counting on this to get my money back from a job I shouldn't have had to pay for
Like you I live in hope ..................
Wow, hold up. so the 140's have the problem? I just recently bought an A4 avant 2.0L 140 2007. should I be worried?
Its mainly the 140 BLB engines from 2005/20006 that had the problem but yes all the other 2.0tdi engines up to the end of B7 production suffer to varying degrees.
The problems don' t seem to have ended until the B8 models were introduced in 2008/2009.