2010 (March) - 1.8 TFSI - Timing Chain or Belt?

**_tones** · 17-12-2013,11:12 PM

Hi, As per subject can anyone let me know whether my car runs a timing chain or timing belt? Engine code is CDHA. Also, if it is a chain, are there any service requirements around it? I know the belt needs changing every 4 Years / 60K miles according to service manual. For reference, my car has done 32K miles.

Ta,

**Guest 2** · 17-12-2013,11:27 PM

I believe from doing a quick google it's a chain.

They don't have an interval just pray they don't start to rattle as this requires change.

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**_tones** · 17-12-2013,11:35 PM

Originally Posted by A6_Chris

I believe from doing a quick google it's a chain.

They don't have an interval just pray they don't start to rattle as this requires change.

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Hi Chris,

I've done a google search too and get differing opinions. Apparently the CDHB runs on a timing chain but could not find anything specifically relating to CDHA. I've emailed Audi CS to check with them (the service book only talks about belts but this is not specific to the engine anyway). I was hoping it was a belt over chain as at least you can change the Belt under service schedule. Had a chain in my W204 Mercedes which needed the tensioners changing but was done under warrantly. Thankfully, no funny rattles yet.

**Guest 2** · 17-12-2013,11:38 PM

Please Help New Member Engine Q's

Confirm with Steve, I'm assuming its a chain going by his first post saying they use the same head.

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**_tones** · 17-12-2013,11:42 PM

Originally Posted by A6_Chris

Please Help New Member Engine Q's

Confirm with Steve, I'm assuming its a chain going by his first post saying they use the same head.

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Read the same article (which is where I got the CDHB reference from). Was not sure the same head meant the same engine type (novice when it comes to engine parts, or many other car parts). I'll ask Steve if Audi do not come back with anything.

**Doctle Odd** · 18-12-2013,12:10 AM

I treat the timing chain same as a belt. You should get 60k miles from it. After that it's probably stretched and a bit worn. It's not that expensive to buy although there's extra labour costs. Much of a muchness IMO

**_tones** · 18-12-2013,12:12 AM

Originally Posted by A6_Chris

Please Help New Member Engine Q's

Confirm with Steve, I'm assuming its a chain going by his first post saying they use the same head.

Sent from my iPhone using Tapatalk

P.M'd Steve A.K.A Crasher. First PM I have sent and received no acknowledgment it was sent successfully (nothing in Sent items). Do these messages get stored anywhere?

**_tones** · 18-12-2013,12:16 AM

Originally Posted by Doctle Odd

I treat the timing chain same as a belt. You should get 60k miles from it. After that it's probably stretched and a bit worn. It's not that expensive to buy although there's extra labour costs. Much of a muchness IMO

Hmm, I've read a few (well 2) horror stories on here around timing chains (all on B8 1.8TFSI) jumping a few teeth... How much has it cost you to change the chain? Technically, it's supposed to last the lifetime of the engine.

**Doctle Odd** · 18-12-2013,12:45 AM

Gearboxes and bearings are sealed for life, oil lasts 20,000 miles if you believe what you read. Chain, tensioner and gaskets costs about 150.00 plus 5 hours labour.

Originally Posted by _tones

Hmm, I've read a few (well 2) horror stories on here around timing chains (all on B8 1.8TFSI) jumping a few teeth... How much has it cost you to change the chain? Technically, it's supposed to last the lifetime of the engine.

**Crasher** · 18-12-2013,12:57 PM

It is chain drive. We have done a few of these now on the 1.8 and 2 litre and it is a heavy job requiring a lot of specialist tools and huge opportunity for disaster if not done correctly.