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[Audi A3/S3] Possible coolant leak??


Roswell
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Guys forgive me as I'm useless with cars.

The fiancee left for work this morning and returned after 2 minutes to say the coolant warning came on in the DIS.

On checking the coolant resevoir I have discovered that it is sitting below the minimum level.

After doing a quick google and looking at the manual I have surmised that the coolant shouldn't really go down unless there is a problem.

The car is only 14 months old and hasn't been serviced yet due to the AVS.

What should I do??.....top up with G12? coolant (can I get this anywhere?) or not top up and get the car towed to the nearest dealer?

Thanks in advance,

Roswell

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[ QUOTE ]

Top it up, if the fault light goes off problem solved, if not call Audi assist. If your fuel warning light came on would you call out Audi assist? smashfreakB.gif

It could just be that the coolant has contracted enough to take it below the correct level due to the cold.

[/ QUOTE ]

totally agree. top it up first just slightly above max level and see where it settles.

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My A3 is less than 2yrs old and the coolant level is almost on the min when cold and marginally above the min when hot - i.e. half way up the first X above the min line.

It has been like this for a while. I contacted Audi Cust Services who said that it would have been on the Max when it left the factory. Sounds like it has leaked at some point or has a slow leak. The car is due a service soon so I'll raise it then but in the meantime carry some spare antifreeze and some distilled water.

Halfords didn't have the exact VW spec mentioned in the handbook, they had something similar but it wasn't exactly the same and I didn't want to take a risk. I therefore went to the local Audi parts counter and got a bottle, think it is 'G12 plus'. Was cheap enough.

How far under the min line was your level for the light to come on? Does it come on the minute it is slightly under the min or does it have to go a fair bit under the min line? If I take the lid off I can see what must be a prob inside.

Let us know how you get on.

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Hi guys,

Thanks for the replies. This morning I topped it up with about a 1/4 of a litre of water. I had left the car lying for a couple of days to see if anything was leaking onto the drive...and there wasn't.

Everything seems OK since I topped it up this morning, but I will be keeping a close eye on it.

By the way it is a 2.0 TDi....why do you ask?

Cheers again,

Roswell

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I asked because there's a well known problem with coolant leaks on the 2.0TDIs but I thought it only affected the very early ones (not sure on this).

I had it on my 53-plater, basically the coolant warning came on and it was about a cm below the min so I topped it up. Next day it was back below the min again. The dealer had a look at it and said the cylinder head was cracked and needed replacing!! Was all done under warranty of course.

The guy at the dealer said this wasn't an uncommon problem with the early 2.0TDIs and they believed there was manufacturing defect in some of the early cylinder heads which could lead to cracking after a while. He did say that he thought it was only the very early ones though.

I'd get your dealer to have a look at it pronto if I were you. Might be nothing but best to get it checked and even if they say it's all fine and not to worry, at least you've done the right thing by getting them to check it so if by some chance the engine goes pop soon after they can't claim you ignored the problem.

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Ok, the guy came out from Audi Assistance....didn't realise they had Audi specific guys who actually work for Audi UK!

Had a look, took the car out for a spin, pressure tested the coolant system, topped it up with G12 plus and some water.......and couldn't see anything wrong. Told me to keep an eye on it and if it dropped significantly again to book it in to my nearest dealer.

So I'm not really any further forward to finding WHY it dropped, but I'll be keeping an eye on it.

The guy (Fraser....who told me there's a programme about him on the Audi Channel) was actually alright and he even switched off the airbag warning light that's been on for about the last year due to me removing my glovebox to fit my Phatnoise!

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There appears to be a number of us on here with the same problem and I've seen a few with the same problem on audi-sport.net, at least one maybe 2 of these had their problem diagnosed as head gasket.

It can't be 'normal' or a 'characteristic' as the vast majority of people seem ok. I've never had to fill up with coolant in any previous cars except one that had a fractured hose and the manual seems to suggest it is a sealed system.

I don't want to be told "it is normal, keep and eye on it" and then 1 month after the warranty runs out the head goes and it is my problem. The coolant shouldn't go from Max to Min in 7000 miles on a modern car.

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