718 CS - Rattly Sound at 2k Revs - Page 2 - Boxster/Cayman - PistonHeads UK

As per the title. 718 CS manual, 1 month old, 700 miles. Gently accelerating, once I reach exactly 2k revs, theres a metallic rattly sound. It lasts about 1 second, whether I keep gently accelerating or keep the revs at 2k. The sound has been there from the start, so its not a new sound. I can't quite tell where the sound is coming from, engine or gearbox. Don't think it's the exhaust. Anybody have similar? Not sure if it's a problem and something I should contact OPC about or not ...

Tim bo said: As per the title. 718 CS manual, 1 month old, 700 miles. Gently accelerating, once I reach exactly 2k revs, theres a metallic rattly sound. It lasts about 1 second, whether I keep gently accelerating or keep the revs at 2k. The sound has been there from the start, so its not a new sound. I can't quite tell where the sound is coming from, engine or gearbox. Don't think it's the exhaust. Anybody have similar? Not sure if it's a problem and something I should contact OPC about or not ... The one I had on loan had something similar as I recall. It was a bit like diesel knock.

Standard feature.....the engine

Think of it as imparting a bit of character...

So no other 718 owner has said they have the same. Mmm. Another long drive yesterday. It doesn't seem to be changing/lessening as the engine beds in. It's enough for me to contact the OPC over. It does not seem right. Thanks for the responses though. Snarky sound comments par for the course I suppose. Edited by Tim bo on Monday 24th April 06:59

Tim bo said: So no other 718 owner has said they have the same. Mmm. Another long drive yesterday. It doesn't seem to be changing/lessening as the engine beds in. It's enough for me to contact the OPC over. It does not seem right. Thanks for the responses though. Snarky sound comments par for the course I suppose. Edited by Tim bo on Monday 24th April 06:59 I wasn't being snarky when I said the one I had on loan had a clatter about it. I cannot recall exactly at what point in the rev range it was, but it was there.

So said: I cannot recall exactly at what point in the rev range it was, but it was there. same here. i test drove a base model and an S though it was quite a while ago now so can't remember exactly but i do remember noticing a rattle lower in the rev range.

So said: I cannot recall exactly at what point in the rev range it was, but it was there. JasonSteel said: same here. Ok, thanks guys. I guess it's a "feature" then, and not a problem. Does sound like a resonance which kicks in at exactly the level of vibration reached at 2k revs. Hoped it wasn't something loose, which would be disappointing in a top-end build like a Porsche, but if others have encountered the same thing then I'm satisfied it's not an issue with my car in particular. Edited by Tim bo on Monday 24th April 12:28

bmw320ci said: Exhaust heat shield maybe they tend to rust away and flap andresonate On a car only a few weeks old? Unlikely.

I test drove one finally a few weeks ago. No rattle, as I recall but again I was gentle. My current daily is also 2.0 Turbo 4 pot, wanted to see the mid-engine difference. Definitely different engine sound and fast but don't remember any rattle.

Exhaust heat shield maybe they tend to rust away and flap and resonate ok no so rust on a new car, bolt maybe Edited by bmw320ci on Monday 24th April 15:02

I've had the 'rttle' 'shudder' in a 718CS PDK - It reminded me of older cars with less power/torque when the revs dropped to the point of the car almost stalling if you did not change down a gear. Not very nice TBH.

Malo said: I've had the 'rttle' 'shudder' in a 718CS PDK - It reminded me of older cars with less power/torque when the revs dropped to the point of the car almost stalling if you did not change down a gear. Not very nice TBH. Does it happen at exactly 2k revs?

That theory would indicate the rpms are high enough for the fuel to be shut off but not high enough for fuel input to stop the engine from stalling. I find it hard to believe that in this day and age a quality manufacturer could put to market a product with under-developed engine mapping. Not impossible though especially in a climate where reducing fuel consumption to the absolute minimum is a key driver.

It sounds like something loose that gets excited by the 2000rpm engine, could be a number of things, and maybe something just not tightened up correctly. I would definitely be on to the OPC, if they try the "they all do that sir" line them get them to show you in a demonstrator. It's not something that any of the reviews I've read have mentioned so I can think it's a 'feature'.

I've not noticed it in 6 months of ownership (Manual S). Occasionally if I am being a bit sloppy I accidentally put it in 3rd not 1st and try and pull away, it groans a bit at that which is fair enough

1964 said: I've not noticed it in 6 months of ownership (Manual S). Occasionally if I am being a bit sloppy I accidentally put it in 3rd not 1st and try and pull away, it groans a bit at that which is fair enough Just don't do the opposite.

Four and half months with my 718 Boxster PDK and no 2k rattle so far. Still running it in so a lot of time in the 2000 rev range. BTW the 2.0T noise issue has not been a problem for me either.

Did you get this sorted by Porsche? My cayman gts is doing this at 2000k woundering if there is a fix / or what is causing the noise?

I had something similar on my 981 and it was internal trim rattling against the aluminium cross bar. The OPC tech stripped the rear of the car down and added cushioning tape everywhere. It seemed to cure it. I also have, in cold weather only, what sounds like the hatch rattling at similar revs which goes away once the engine is war,. I've not sorted that one yet as it's a bit intermittent.

Hi Tim Bo, Just took out my 718C PDK to have a check. I held it at 2000rpm in 1st 2nd and 3rd gears and did not hear a rattling. The F4T has some interesting nuances in its sound but nothing like a rattling sound that is consistent with a specific RPM. I would call OPC.

I’m on a long term loan of a Boxster 718, and have the same rattle, but I thought it was a feature. I’ll try to stick to 2000rpm on next drive and let you know.

Took it to the OPC . It Only happens when sport exhaust is switched on. They reckon it’s the sport exhaust valves and nothing to worry about ! Interested to know if they all do it . You need the window down to hear the noise !

ClubsportStr said: Took it to the OPC . It Only happens when sport exhaust is switched on. They reckon it’s the sport exhaust valves and nothing to worry about ! Interested to know if they all do it . You need the window down to hear the noise ! Well over 10000 miles in my 718S now, sports exhaust fitted...doesn’t rattle at all, anywhere in the rev range. They may be right and the rattle is completely benign and nothing to worry about, but it shouldn’t do it.

Mine does it too. 1500 miles.

I’ve not had this on base 718 with PSE.

Anyone have an answer for this? My 718 has gone to OPC today via Porsche Assist. I get almost a grinding noise at 2k rpm. Hopefully nothing too bad as missing my car already!

The demo base car I had did it too, going through 2000rpm just as the turbo spooled up.

After my OPC having my car for a week, I have just been informed it is the exhaust actuator and the car will need a new sports exhaust! The wait continues

Would just like to add to this thread that my 2017 2.0 Cayman also does this. Anyone find a solution? Cars going to OPC to be fixed on 4th of April. Will update thread if they fix the issue.

I got the age old 'our technician couldn't replicate the fault sir'. Will pester them again when it goes in for its service.

oliverloxley said: I got the age old 'our technician couldn't replicate the fault sir'. Will pester them again when it goes in for its service. Might be a good idea to hop in the car with a service advisor and let them hear it for themselves with you present. Liam

It could well be the exhaust flap. This was a common fault on BMW M cars and the exhaust was replaced FOC. Have a look underneath at the exhaust and give the valve actuator pin a wobble.