Audi A4 - Broken timing belt issues

Hi everyone!

Does anyone have a view on how likely a seized water pump could result in a timing belt breaking?

My car is an A4 sport 5 years old 70,000 miles and serviced in line the variable service requirements.

thanks for your help!!

Reply to
clive.twist
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wrote

Very likely since it's driven off the same belt if we're talking about the AWM engine.

Pete

Reply to
Pete

once anything driven by the belt seizes, the belt will most probably loose its teeth, heat up and................ping

Reply to
Lez Pawl

Thanks for your response.

I appreciate that the water pump is driven from the same belt, but is it common for a waterpump failure to wreck an A4 engine?

Or perhaps there is a more general issue with A4 timing belt failures as outlined by the US class action?

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I would be interested in other peoples experiences?

Reply to
clive.twist

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If its driven by the T-belt then a WP failure would cause havoc. At 70K miles you'd be advised to think about a T-Belt (and tensioner change) and to change the WP and thermostat while you were in there.

I know the VAG service interval is 100K+ miles but prevention is much cheaper than cure if it fails.

I.

Reply to
Iain Miller

wrote

There were only a few years where the engine design was such that a failed WP would cause a TB failure, so in the grand scheme of things, it's probably not very common. But it's not impossible either.

Usually, the most common reason for TB failure is a prematurely (if you look at Audi's replacement recommendations) broken TB tensioner. But whatever the cause (broken tensioner or seized WP), the result is generally the same: bent valves on the engine.

Those who are "in the know" replace the TB, tensioner, rollers, and WP every

60K miles, just to be safe.

Cheers, Pete

Reply to
Pete

Audi UK now schedule timing belt change on all cars at four years/60k miles, whichever comes sooner (except the RS6, which is three years). This applies retrospectively, to all models with a timing belt.

Reply to
Peter Bell

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