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A4 water pump failure - class action lawsuit?

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Old 02-06-2007, 08:06 AM   #1
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Default A4 water pump failure - class action lawsuit?

I've got a 2002 A4 with 65,000 miles. The car overheated on the highway and had to be towed to the dealership. The culprit? A failed waterpump where the PLASTIC impeller was just spinning on the shaft. The dealer tells me that this is a common problem and that I was lucky just to pay $1400 to have this fixed. Apparently, sometimes when this fails, the impeller seizes up completely and locks up the timing belt....you know the rest of the story, catastrophic engine damage.

By the way, the water pump bearing was fine. Also, aftermarket water pumps use a METAL impeller, not a plastic one, so this tells me that Audi has a design problem here.

So, I'd like to hear from anyone else that has experienced this same problem. If we get enough complaints here, maybe we can force them to do something. Thanks....
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Old 02-06-2007, 08:16 AM   #2
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Default you should take it to and independent shop and save 40%

That's why some people here like to do a "Timing Belt" replacement around this mileage. TB is normally rated up to 105k miles, but the WP and sometime a tensioner gives way before that. You were really lucky if it's only the WP!
CAL? Unlikely, few people experience this, mostly because they take preventing measures as said above.
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Old 02-06-2007, 08:18 AM   #3
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Default so you know >>>

over in the TT arena, most change timing belts (and water pumps) before 60k because of this problem. Alot of us dont put much mileage on our cars (mine's an 01 with 55k) so the weather wears down the plastic bits, seizes the timing belts and boom looks like we need some serious engine work done. It's not an isolated issue with a4's but with all audis. Mother's allroad has a plastic water pump as well, i believe. What audi needs to do is change the timing belt interval to 60k instead of 100k...
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Old 02-06-2007, 08:20 AM   #4
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Should've stfa'ed first. You're 5K late for a t-belt/water pump job.
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Old 02-06-2007, 09:05 AM   #5
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You aren't the first to fail, but it's far from a common problem, in my opinion.
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Old 02-06-2007, 09:12 AM   #6
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I have no idea why Audi went away from the metal impellers
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Old 02-06-2007, 09:18 AM   #7
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Not really 'late' but within the new recommended time frame
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Old 02-06-2007, 09:19 AM   #8
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Default 2nd, get the whole TB/Water Pump job done at an Indy for $825

That is, if you can get it to an indy for less then the difference.
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Old 02-06-2007, 09:27 AM   #9
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Conveniently most t-belt failures occur after the factory warranty.
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Old 02-06-2007, 09:31 AM   #10
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Default The water pump has been updated.

While it's still a plastic impeller, it's a much much more durable reinforced plastic.
Old impellers had a pn stamped on them of 06A121021A
New impellers have a pn stamped of 045121021A. (No relation to the actual water pump pn).
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Old 02-06-2007, 09:36 AM   #11
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Default You're an ***...just what someone wants to hear

when they're faced with a problem...STFA.
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Old 02-06-2007, 09:54 AM   #12
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i heard it was due to rust issues
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Old 02-06-2007, 10:02 AM   #13
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Default Re: Not really 'late' but within the new recommended time frame

So if Audi decides to change the recommended servicing time frame on a timing belt or water pump, how is the average person supposed to get this information? It seems like an acknowledgement of a problem on their part and they should be responsible for getting this info out via a campaign, mailing etc.
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Old 02-06-2007, 10:11 AM   #14
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I meant recommended enthusiast timing, I dont think Audi has formally changed this
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Old 02-06-2007, 10:18 AM   #15
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Default I dont think you will win though

It is a known issue among B6 A4 people to change their timing belt around 50-60k miles. I swapped mine around 53K miles and found my water pump was about to go.
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Old 02-06-2007, 10:21 AM   #16
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Default Well Audi did change it to 75k for the timing belt

At least thats what it says in the manual. Then again they also say to change the oil every 10k miles.

I think ill listen to my gut and change the timing belt much earlier.
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Old 02-06-2007, 10:37 AM   #17
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Default Not really trying to be one. It's well known that driving past 60K on original t-belt/pump on...

the 1.8T is asking for trouble.
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Old 02-06-2007, 10:38 AM   #18
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Default quite possible - cavitation causes pitting and corrosion on metal impellers...

I guess the plastic ones are more resilient in that regard?
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Old 02-06-2007, 11:20 AM   #19
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Default you *can* change oil every 10k. i've seen it done without any problems

but i still change it every 5
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Old 02-06-2007, 11:29 AM   #20
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plus the plastic impellers are lighter weight.
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