Referring to the ticking sound

Havent started the car in over 2 weeks....that was within the first three minutes after a cold start. It continued on like that until I shut it off

 

My 2012 CS2 does not have a ticking sound like that no.

 

Link can't be accessed

 

fixed. uploaded to youtube

 

As far as I can tell from this video,it sounds normal. Although I might be wrong since it's pretty hard to identify engine noises over the internet...
Maybe mention it during your next trip to the dealer...?

 

Ya might want to drive it and see if it goes away after the oil gets warm.

 

Good suggestion. It's not unusual for atypical engine sounds to disappear after a few minutes of driving.

 

I noticed that tick on mine recently.
It was on passenger side.
It went away after driving.
Car had been sitting a couple weeks also.

My E63 ticks on cold start too.

 

Sounds like a valve, lifter, or whatever they call them on these variocam cars. There's like a zillion parts where before were, lets see.... cam, rocker, tappet... three. If that is indeed what it is, it doesn't necessarily mean anything is wrong or even out of adjustment. Its just something that happens sometimes even when everything is well within spec. Often times it goes away or quiets down as everything warms up. Never hurts to check with a tech, even if its gone by the time you get there and they tell you the same thing you'll usually learn something just talking with them.

 

I can't tell from the video. Sounded normal. Need more info, like:

Mileage?
Last oil change?
What oil?
Viscosity?
Tell me how you broke in engine first couple thousand miles?
Air temp?
Did the noise dissipate after the car came off the high idle setting?

Bottom line, cold start after 2 weeks, you will hear more mechanical noises upon startup, but they should dissipate quickly, less than a few seconds.

 

One more:

Oil level, how many bars down from full are you?

 

DFI: direct fuel injection. I had the same question and asked the tech.

 

It stays after high idle.
Nobody would mention it, if it went away that fast.
After driving, it was completely gone though.

Started it this morning and it is still quiet as a mouse.
It must be a long sit time thing.

Naturally, 2 dealers said its completely normal.

 

Of course its normal. Its gravity. Oil slowly drains away from high areas and seeps into low areas. Same reason a car that never smokes when parked overnight might produce a cloud after being parked a month. Same reason why the vast majority of engine wear occurs not running flat out at redline but during cranking and starting after being parked a while. Parked long enough, the oil film may be almost completely gone. This is why aircraft and other valuable engines are often cranked by hand several times before starting if they have been parked a long time. Of course the really vital parts- crank main bearings for example, or camshaft bearings- receive a constant flow of oil under pressure. Other areas, cam lobes for instance, have oil squirted on them. Cam rockers or followers, I don't know for sure how Porsche does the 991 but on many Porsche engines they are neither pressurized nor squirted but rely on the general abundance of oil flying around for lubrication. Which is fine while running but can sometimes drain away when parked long enough and take a while to return once running again. Oil isn't compressible but air is, so when these parts get dry enough we get to hear them tic, tic, tic until lubrication returns. That's all it is.

The sound in the video is almost certainly associated with one of the intake valves. Intake valves on a flat 6 are up top, exhaust below, so guess which ones tend to get dry first? Count the tics, about 7/sec, maybe 8 times 60 sec=420, 480 times 2 (its a 4 stroke) and you got 840-960 RPM, pretty close to idle.

Okay smartass, so why don't they all tic, and a lot more often? Good question.

I once took a really high-end audiophile turntable bearing to a machine shop. All nice and clean and dry, the machinist put it together and started torquing it around by hand. Surprisingly hard, I was starting to get worried. He explained that with parts of a certain tolerance air alone will act as a spring or lubricant. After a bit more man handling he estimated the tolerance of the parts. Impressively close to the actual measured spec, he was. Porsche specs are tight, just not quite to the aerospace level where air becomes a bearing, which is why most of them usually won't be noisy but occasionally one of them here or there will be. And yet it will all be perfectly normal.