Audi S4 B6 - What can go wrong?

Audi S4 B6 - What can go wrong?

Author
Discussion

Ray Singh

Original Poster:

3,048 posts

230 months

Monday 22nd January 2018
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All. I am looking at a Audi S4 B6 - I have found one on Autotrader that has been part exchanged to a garage close by.
The price is quite low, and hte advert states that the car is 'down on power' but no EML light is on.

What could the problem be? I have read that coil packs often go on these.

I have access to a VAG code reader - VCDS - would this show what the problem is?

I am looing for a rolling project car.

Thanks.

Welshbeef

49,633 posts

198 months

Monday 22nd January 2018
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That 4.2v8 sounds lovely - but is thirsty.

Are you looking at a soft top to really enjoy the noise?

Ray Singh

Original Poster:

3,048 posts

230 months

Monday 22nd January 2018
quotequote all
No - i have a Porsche Boxster 3.2S for the summer - The S4 is for winter and hence a hardtop for the commute.

Welshbeef

49,633 posts

198 months

Monday 22nd January 2018
quotequote all
Ray Singh said:
No - i have a Porsche Boxster 3.2S for the summer - The S4 is for winter and hence a hardtop for the commute.
Estate version is a good option

Remember cam belt change on these is pricy and needs front bumper taken off.

Ray Singh

Original Poster:

3,048 posts

230 months

Monday 22nd January 2018
quotequote all
Would love an avant, but beggers cant be choosers!

Link to advert here:
https://www.autotrader.co.uk/classified/advert/201...

It comes with 4WD !!!

Welshbeef

49,633 posts

198 months

Monday 22nd January 2018
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Looking at that service invoice of cambelt change it’s 2014 and it’s miles mean it’s now overdue and is £1.5-2k job


MattS5

1,898 posts

191 months

Monday 22nd January 2018
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Cam Belt?
It’s a chain, and isn’t a service item. Well, not until the plastic guides crack and the chain goes a little slack and then starts to make far too much noise on start up.

Getting it rectified before it breaks seems to be the way forward....at a cost of around £2k.
Leave it until it breaks and it will be dearer.

Ran mine for 60k over 7 years, sold it at 100k having feared I’d pushed my luck on a car which was then nearly 11 years old.

Welshbeef

49,633 posts

198 months

Monday 22nd January 2018
quotequote all
This is the same base 4.2v8 as per the C5 RS6 is it not?
If so yes cambelt


Also as per the advert you’ll see the service item listing cambelt....


You sure you didn’t skip the cambelt service on your previous car?

DuraAce

4,240 posts

160 months

Monday 22nd January 2018
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Ray Singh said:
What could the problem be? I have read that coil packs often go on these.

I have access to a VAG code reader - VCDS - would this show what the problem is?

I am looing for a rolling project car.

Thanks.
Thinking cynically..... It isn't going to be a cheap or easy fix, otherwise the garage would do it themselves wouldn't they?

VCDS won't provide a definitive diagnosis but might point you in the right direction.

Prepare for a chain or combustion chamber (decoke) issue.

Fort Jefferson

8,237 posts

222 months

Monday 22nd January 2018
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Welshbeef said:
Remember cam belt change on these is pricy and needs front bumper taken off.
They don't have a cambelt.

Fort Jefferson

8,237 posts

222 months

Monday 22nd January 2018
quotequote all
Fort Jefferson said:
Welshbeef said:
Remember cam belt change on these is pricy and needs front bumper taken off.
They don't have a cambelt.


And they've been changed.


Welshbeef

49,633 posts

198 months

Tuesday 23rd January 2018
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Fort Jefferson said:


And they've been changed.

Must have changed post 52 reg year.

Fort Jefferson

8,237 posts

222 months

Tuesday 23rd January 2018
quotequote all
Welshbeef said:
Fort Jefferson said:


And they've been changed.

Must have changed post 52 reg year.
Nothing has changed, the B6 S4 never had a cambelt. You really must stop posting about cars you obviously no nothing about.

BrittasBay

55 posts

75 months

Tuesday 23rd January 2018
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well said Jeff - hard enough to get information on these cars now - without having to wade through ill-informed replies

anyway - interesting point about the 'chain' service intervals - just a thought, once the work is done, what would be a safe amount of miles to clock up before further replacement?

Dr G

15,175 posts

242 months

Tuesday 23rd January 2018
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In the case of this issue with B6 S4s sadly the information isn't hard to come by. The fault is common and often discussed (most recently on here just last week).

There will (very very likely) be a serious issue with the timing chain. Repair is very expensive (think £5k). With regular oil changes at the correct grade the replacement will last many years although uprated parts are available from the US if you wanted to invest.

The seller is probably aware of the issue and the likely cost of repair. It's being sold as an 'unknown' to allow their recouping the maximum amount of money as repair would guarantee them a loss.

Fort Jefferson

8,237 posts

222 months

Tuesday 23rd January 2018
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Dr G said:
In the case of this issue with B6 S4s sadly the information isn't hard to come by. The fault is common and often discussed (most recently on here just last week).

There will (very very likely) be a serious issue with the timing chain. Repair is very expensive (think £5k). With regular oil changes at the correct grade the replacement will last many years although uprated parts are available from the US if you wanted to invest.

The seller is probably aware of the issue and the likely cost of repair. It's being sold as an 'unknown' to allow their recouping the maximum amount of money as repair would guarantee them a loss.
I can't add much to this. Although I think the repair would be a bit less than £5K if it was just the chains and tensioners and no damage was done to the valves.

I've had my S4 since it was 6 months old. It was an ex demo with 8.5k on it. at 11k it developed a rattle and Audi did the tensioners under warranty. It has only done 46k and has never been anywhere but the main dealer for servicing. It has developed a rattle on startup again, but different from the first one. It runs a dream and is as powerful as it ever was.

If I was thinking of selling it, as good as it is, I wouldn't expect much more than £5k for it. So the one in the advert we are talking about with 100k on it can't be worth anything with an expensive fault. If it hadn't got a fault it would only be worth £3k to £4k.

anonymous-user

54 months

Tuesday 23rd January 2018
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don't worry welshbeef has always been full of st.

Welshbeef

49,633 posts

198 months

Tuesday 23rd January 2018
quotequote all
Fort Jefferson said:
Nothing has changed, the B6 S4 never had a cambelt. You really must stop posting about cars you obviously no nothing about.
That’s a bit chipper young chap.

It’s the same 4.2v8 unit as the C5 RS6 which has 3 year replacement cycles.
Turns out also from further replies even though it is a cam chain now frankly it also needs changing to avoid a big fail cost.

Ray Singh

Original Poster:

3,048 posts

230 months

Tuesday 23rd January 2018
quotequote all
Thanks all - I think i will leave that alone. It seems to have disapeared from Ebay too.

I like the idea of the big engine A4 of this vintage, but the engine choices went from small to massive and nothing between. 1.8T or 2.0 TFSI and then nothing until 4.2 V8.....


AudiSport

1,458 posts

216 months

Tuesday 23rd January 2018
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3.2 V6 FSI?