2014 TDI exec. I also have the rattle on startup. It's 2 seconds or so max and I have 97k miles on her. I believe the emissions warranty is good for 120k or 10 years on the 13-14's.

My car is at the dealer as we speak getting a new rear main seal replaced under warranty. I'll ask them to listen for the rattle and see what they say.

 

Wow sorry to hear that they led you on like that.

I too think it's something that may not be worth worrying about. I have not come across an instance of the rattle being the root cause of a catastrophic failure and it sure seems like many of us have this noise. In any case I do plan to inquire about it.

 

It is the craziest thing. 90% of the time the rattle is there first thing in the morning. Park at the office on an incline and 5 hours later it rattles on startup on my lunch break...doesnt matter if I park nose up or nose down. Same when I leave in the evening. If I park on a flat surface it never rattles on warm start like it does at the office. The whole thing os bizarre.

 

It is the craziest thing. 90% of the time the rattle is there first thing in the morning. Park at the office on an incline and 5 hours later it rattles on startup on my lunch break...doesnt matter if I park nose up or nose down. Same when I leave in the evening. If I park on a flat surface it never rattles on warm start like it does at the office. The whole thing os bizarre.

Same as mine so curious what comes out of this.


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Got mine going in next week for them to look at (well listen to) It's still under a CPO warranty. No pattern that I can determine. It does it sometimes warm also after being in store for 30 min sometimes and other times after sitting overnight it doesn't do it.

Had a MB GL350 CDI that had same sound and it was a bad bunch of timing chains they got (but wouldn't replace out of the standard warranty even though it was documented they were bad parts). Hopefully VW takes care of it.

 

Same thing for me: have V6 2013 TReg. Currently in the shop they will be "checking the chain" on Monday. Exactly the same symptoms as described here.

Because it does not always happen I think it might be related to the position of the chain (which is random). So if engine happens to be turned off at some specific location that has a bad link - it will cause a sync issue when turned on with low oil pressure during cold start. Ofcourse if thats the case then it will only become worse over time. Bear in mind I'm no expert in cars so just some random theory..

 

Maybe a flaw in the chain/guide interaction you say? That would be interesting. It certainly is very weird how random it can be at times.

I think the thing that spooks me the most from a long term perspective is the effect of all of this repeated chain slap on the guides and possibility for premature wear/failure. Have read on other VAG forums where owners have experienced broken guides that led to total engine failure. In my case where I park at work on an incline the noise is quite horrendous and it seems as though a slack chain has gravity working on it to the point where it may be resting off the edge of the guide and then soon as the engine starts it is basically “sawing” at the guide for a split second at startup until it tightens.

Or I am just a car hypochondriac.

 

Hey NTDI , has that intermittent rattle on cold start ever returned ? These are my exact sounds primarily happens when oil starts nearing end of life

https://www.youtube.com/channel/UCf2H17zPbkvblBd3Ib7gnCA

 

Yeah I’m wondering same thing.


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I have 80,000km on my CRCA and I have never had a start-up rattle. I have serviced it myself since new and hopefully I don’t heard it for many more years to come 🤞🏼

 

Archoil

 

It reallly works.