Hi, I've got a 2014 V8S convertible with about 10,000 miles on the clock.

A couple of months back I started hearing an intermitent "chirping" noise coming from the rear of the car, which I thought was something to do with the suspension, though was not convinced. Since it was not a regular occurrence I'd put it to the back of my mind.

However now over the last couple of outings I have a problem whereby the exhaust doesn't appear to shut off from "noisy" mode when switched first time.

I'm now guessing the two may be linked

Has anybody else had something similar occur?

Cheers

 

I've not had any problems with the car, in your case seems like a visit to the dealer is in order...likely a simple fix.
Lawrence

 

I didn't have issues with mine not closing but I did have a quick chirp around a certain RPM. Turned out to be the exhaust valves, dealer ended up replacing the whole muffler assembly under warranty. I'd just bring it in.

 

It's already booked in for the vertical scratching of the windows, new window seals etc.

Guess I'll add exhaust investigation to the list!

 

How is that a "problem"?

 

I can hear my exhaust valves open and close...they kinda squeak. It's a harsh environment so I imagine failures aren't unheard of.


Dave

 

There was a TSB for the squeaky exhaust valve, I know of a few cars that had the rear muffler replaced under warranty because of the squeak.

The valves staying open might be related, or it could be something different. I have also seen one car where the valves stayed open, again it was fixed by a dealer, under warranty.

There is also another TSB about removing the vacuum pump that is used to operate the exhaust valves, and using the manifold vacuum to operate the valves instead. This was because the vacuum pump was said to be "noisy" but you never know if it was maybe because the vacuum pump is unreliable...

I believe newer cars like 2016MY don't have the vacuum pump anymore, they just use the manifold vacuum... if that's actually the case, there is probably a valid reason for it...

 

So I got the car back from the dealers - solution new exhaust/muffler back box fitted (ouch) .... luckily covered by warranty

 

This is about the 5th or 6th active exhaust muffler replacement reported here in the more than 2 years I've been on this forum.

 

Hmm...

The exhaust on the "shopping car" 330ci runs off manifold vacuum. Or, it would, if the pipe were still connected.

Good that it was fixed under warrantee.

 

The muffler on our 2014 V8s was replaced under warranty a couple of weeks ago. We could hear an odd noise when letting off the gas at high rpms and brought it in for service. They replaced the muffler under warranty but the odd sound is still there.

 

Three months ago I bought an R 2014 and it took a little over a month to verify that the exhaust valve is always open. I have a 2 year warranty so I took it to fix. The warranty says that it takes over the vacuum pump but the shop says they have to change the entire rear part of the exhaust. Is it necessary to change everything? The guarantee says that it does not take over. Maybe in the Jaguar workshop they do not know much about the subject ...

 

 

I would think the vacuum pump or solenoid would fail before the valves would get stuck. (They're normally open, and require vacuum to close.)

You could also confirm that the previous owner didn't remove fuse F43 (under the passenger footwell.) This disables the active exhaust vacuum pump, and leaves the valves open all the time. That's the way I'm currently running.

 

they don't get stuck the bushing material on the early units can cause squeaking. the news ones are a sintered bronze style to eliminate the squeaking. it only happens on a few cars and have seen maybe 5 replaced and we're a large dealer

 

 

Thank you very much to all. I will watch the fuse. The surprising thing is that the exhaust sounds thunderous even though the valve is not completely open!

 

Has anyone had this issue on cpo warranty? My closest dealer said the exhaust system isn't covered under cpo...I found that hard to believe as Porsche and Aston covers the exhaust with no issue. Basically they said the actuator on mine was fine, the switch was fine but the vacuum line was not and it's a fix around 180$, thoughts? BTW its a 2016 AWD V8R

 

Good to know this....

I was just in at the dealership for a spoiler deployment issue and decided to also mention (yes, first world problem) that it sounded like my F-type wasn't purring as it used to. Even in active exhaust, there were very few pops and crackles. The last time I reported this issue was in July 2019 during my annual service -- at that time they "found rear left muffler control chamber vacuum hose disconnected". They reconnected the hose and all was fine.

This time, I was told that the muffler valves were stuck or not opening/closing properly. So, they've now ordered a new muffler (under warranty) -- should get this issue fixed early next week. I'll update this thread once the work is done.

I guess you can add a MY2018 R-Dynamic to the list of F-types with a replacement muffler.

 

UPDATE -- Got my new OEM muffler/exhaust. There is a noticeable difference in the sound while driving and toggling between the modes. Not sure why I didn't realize that a new exhaust would include new chrome tips -- nice to have new ones that are sparkling clean

Here's the work order summary in case this happens to someone else: