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Yep, yours just need to be lubricated if they are squeaky. Use White Lithium Grease spray. It sprays out thick so don't use too much.
No dice on getting the Xentry from my dealer. Tried to sneak a quick photo but was told off.
Not sure how much truth there is in what I have been told but apparently they use a special grease. Given that exhaust temps can exceed 1000 degrees (at the dump pipe), you might need to refresh that lithium grease fairly often. Might want to try high temperature grease instead.
Originally Posted by ///Bruce
One of the things you may be overlooking is by going 'straight pipe', each exhaust pipe will only hear the noise from only four cylinders per side at a time. The x- or h-pipes at least give you the sound of all eight cylinders from each exhaust pipe. Just sayin'....
May not lose top end power but in cruising/ normal driving scenarios you are supposed to lose low end torque if the exhaust has been engineered correctly with the H pipe in the correct location. Depends how much you trust those AMG engineers.
One could say it sounds like wastegate chatter.
On the C63s it is spot on 3rd gear and gradually accelerating. It only seems to happen at the exact revs that were mentioned by others. I do wonder if permanently closing the H-pipe flap will disturb the car's balance?
Is there any definitive fix for this? I want to know what to tell my dealership as they aren't really known for AMG vehicles...
The only way to fix it is replace the flap motor or whole exhaust as the H-Pipe doesn't bolt off or come as a separate part from the exhaust.
If you are out of warranty, you can either upgrade to an AWE Switchpath exhaust or if you don't want to, you'll need to weld the H-Pipe flap and plug in a AWE simulator to prevent the engine from going into limp mode and throwing a CEL (Check Engine Light).
You can try to grease it but I don't think it will last long.
What I want to know is if the H-pipe is welded shut, will it disturb the car's balance, performance or cause droning? This is why I'm reluctant to do this. Perhaps @untamedd knows?
Regards
George Lisciandro
Last edited by George_1992; 01-30-2020 at 05:53 AM.
I have the same exact thing happening to me in every gear, before i had the actuators replaced and now 500miles later it came back even worst. I will cut out the whole valve and weld the H shut. Waiting for my AWE sim.
I have the same exact thing happening to me in every gear, before i had the actuators replaced and now 500miles later it came back even worst. I will cut out the whole valve and weld the H shut. Waiting for my AWE sim.
That's sh*t mate sorry to hear this. You've got the performance exhaust on yours too, right?
Yeah. Heard this **** happening to 2018+ E63 aswel
Ridiculous. You'd expect more from AMG.
I'm looking at cutting out my H-pipe, blocking it off and plugging in the simulator too. Do you think getting the H-pipe closed off would create drone or ruin the sound of the performance exhaust? This is the only thing that's worrying me.
Hi guys, i want to update on my previous post. So i didn't touch the h pipe (even tho i have the awe sim in the glove box) , but instead i went full catless and i cant even hear the damn thing rattle. 😁😆👍
Had the same fu**ing rattle on my 2016 C63s coupe and it was crazy annoying My MB dealer here in Russia didn't help me so I decided to "tune" my exhaust.
I made my C63s catless (bought downpipes) and just pluged OFF H-pipe valve and made it CLOSED forever by welding it in closed position. So now I have very loud exhaust and no rattle!
The only one problem is CEL error, but gonna fix it by going Stage 1 or Stage 2.
[QUOTE = untamedd; 7883315] sí, la mía se parece a esa imagen. Fue fácil para mí, ya que me habían quitado la válvula, así que solo podía insertar el disco en el medio.
ps nada malo en tratar de hacer que se vea como acciones como sea posible, pero el concesionario se verá en la soldadura y decir que no es la acción de modo que eso es algo a tener en cuenta también. [/ quote]
Hello guys . same problem in my car. and I have started reading this great Forum that thanks to you things are easier. I also want to cut pipe H but I'm not sure where to cut it and if the motor that closes and opens the valve, does it have to stay there or disappear? it will give me error and I have to buy the AWE simulator? thanks
I had the rattle start after my secondary cat delete and only with the performance exhaust button turned on (the loud button). Only ever heard it with ~30% load, in 2nd and 3rd, between 2k and 3k revs, going both up and down through the rev range. I could make it happen in 4th at those revs but only using about 60% throttle.
I was hesitant to have the H pipe welded shut as I expect it does more than control sound (could be wrong), so I had my mechanic pull out the valve, lube with high temp grease, heat and stretch the spring holding the valve and putting it back together (1 hour all up). The valve doesn't just bolt off - it is more of a pull to remove it. Sorry, I didn't take pictures while he was doing this cos I was too busy looking under the car at my front tyres which are due for replacement at 12,000kms (f&*k).
After 2 days, there is still no noise (I will keep the group updated if it comes back). I suspect the spring stretch provides some additional firmness which is what it needs so that the butterfly valve doesn't flap under those ~30% load conditions.
Hello guys . same problem in my car. and I have started reading this great Forum that thanks to you things are easier. I also want to cut pipe H but I'm not sure where to cut it and if the motor that closes and opens the valve, does it have to stay there or disappear? it will give me error and I have to buy the AWE simulator? thanks
Yes, you need the AWE simulator. Just buy one, plug it in and get the exhaust shop to cut the H-pipe out, weld the flap closed and re-weld the H-pipe into the exhaust again so it looks stock
Please tell us how you go!
Originally Posted by The Corndog
Hi all, I had my mechanic pull out the valve, lube with high temp grease, heat and stretch the spring holding the valve and putting it back together (1 hour all up). The valve doesn't just bolt off - it is more of a pull to remove it.
Nice work bro thanks for explaining that
I think you're onto something with the "spring stretching" technique because when I lightly did this on mine I noticed the rattling noise completely disappeared for two weeks (but returned I'm guessing because because I didn't stretch the spring too much).
Last week my Mercedes dealer ended up doing the standard lubricate on all of my valves. I'm out of warranty but they did it for free, and it has been fine. They're really good at the dealer I go to in Miranda, Sydney.
If it comes back, I'll stretch the spring on my H-pipe valve even further.
There's a TIPS DOC G149.10-p-064223 regarding the issue and is well known by Mercedes-AMG so even if you are out of warranty they will sort it out.
Last edited by Jimmy_c63s; 06-08-2020 at 05:39 AM.
Nah it's not the wastegate in this car that causes it. I know what you're saying because i've had wastegate "chatter" in other cars before but as explained in the previous posts the problem we're all having with the C63 here is the actual H-pipe flap that rattles.
So my rattle is still there and I'm learning that Facelift C63s owners are now complaining of the same thing on their cars too which is a shame 👎
Heading back to Mercedes again this month to assess the ongoing rattle from my H-pipe and this time they will try to do a "goodwill" (out of warranty) case for me to get the part changed instead of just greasing it. I hope Mercedes will do the right thing and honour a replacement.
After the grease failed to fix my issue I was thinking of just buying it myself and applying it whenever needed but at $120 AUD per tube (part no. A0009899151), I don't think so.
The alternative product for this is Castrol Molub-Alloy Paste TA but I can't find this in Australia anywhere.
Anyway, I'll report back here in case others have this same problem in future.
So my rattle is still there and I'm learning that Facelift C63s owners are now complaining of the same thing on their cars too which is a shame 👎
Heading back to Mercedes again this month to assess the ongoing rattle from my H-pipe and this time they will try to do a "goodwill" (out of warranty) case for me to get the part changed instead of just greasing it. I hope Mercedes will do the right thing and honour a replacement.
After the grease failed to fix my issue I was thinking of just buying it myself and applying it whenever needed but at $120 AUD per tube (part no. A0009899151), I don't think so.
The alternative product for this is Castrol Molub-Alloy Paste TA but I can't find this in Australia anywhere.
Anyway, I'll report back here in case others have this same problem in future.
PS: Here is the paste that they apply A0009899151
Thanks!!!
My mechanic put me on all three flaps yesterday, grease he uses on his race car.
My mechanic put me on all three flaps yesterday, grease he uses on his race car.
The noise is gone.
Good to hear. Where did he actually apply the grease on? Was it on the spring that connects to the flap? Also, do you know exactly what grease he used?
Last edited by Jimmy_c63s; 08-23-2020 at 12:26 PM.
Good to hear. Where did he actually apply the grease on? Was it on the spring that connects to the flap? Also, do you know exactly what grease he used?
From what he told me, the grease was applied by the spring and inside (I don't know exactly how)
And his dealer is Liqui Moly, so I imagine he uses from that brand.
01-06-2020, 09:38 PM
My MB dealer here in Russia didn't help me so I decided to "tune" my exhaust.
