2010 Mercedes C63 Intake Manifold Blew Up
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C63
I’m not entirely sure how, but I was driving home one day and my car lost all its power and I barely made it home. I was left with an engine code. The intake manifold pressure sensor has a malfunction. So it could either be the sensor or the timing of my car I assume. Since it back fired.
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First one I have ever seen do that, the concern here would be tracking down why it happened if it literally has never happened to anyone before, just sticking another one on it may result in the same if you don't understand why it happened and even used ones are not super cheap to do that experiment on.
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C63 507 Coupe
That's crazy! I agree with Rob, you need to understand the root cause before you have an expensive repair suffer the same fate.
Something detonated, as evidenced by the smoke and the overpressure needed to split the manifold. What cause it?...I don't know. Intake valve somehow open during power stroke?
Something detonated, as evidenced by the smoke and the overpressure needed to split the manifold. What cause it?...I don't know. Intake valve somehow open during power stroke?
Last edited by Big Worm; Mar 9, 2025 at 03:01 PM.
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First one I have ever seen do that, the concern here would be tracking down why it happened if it literally has never happened to anyone before, just sticking another one on it may result in the same if you don't understand why it happened and even used ones are not super cheap to do that experiment on.
(the backfire)i might be able to help you with a used one (the upper piece that is broken) but im living in europe not sure how sending it works.
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Wild stuff. Important to figure out what caused this because despite all the M156 intake manifold issues that people have been dealing with the over the years, the top shell blowing apart has not been one of them.
Over-pressurization can be a cause but if it was coolant / cooling system / head gasket related, there are other components that would fail first. Even if that pressure made it to the IM, I would expect those aluminum-foil bolts to fail well before anything else.
Too much oil and a completely overwhelmed PCV could also be a factor. Are you sure the engine wasn't over-filled at the last service?
Over-pressurization can be a cause but if it was coolant / cooling system / head gasket related, there are other components that would fail first. Even if that pressure made it to the IM, I would expect those aluminum-foil bolts to fail well before anything else.
Too much oil and a completely overwhelmed PCV could also be a factor. Are you sure the engine wasn't over-filled at the last service?
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Holy F*ck lol.. has the cause been determined yet?
It’s hard to believe this would be an over pressurisation event, because there are so many other parts of the manifold that are much weaker than that section.. The bottom pan is thin magnesium that regularly blows out (usually from corrosion though) the Y-pipe plenum that leads to the filters is just held on by 2 plastic clips. I would assume back pressure would blow that off long before that section. Even the plastic filter housing is brittle plastic. The PCV is also notoriously soft, and should have blown off the back if none of the previously mentioned options did not… I’m really curious on this one man
Any update?
As far as replacement, I checked a couple months back and you could still order a new I.M. From Mercedes for around 2k. Before shipping/tax. No idea how long the wait is tho. I don’t think it’s something they have sitting on the shelf. Needs made and shipped from Germany if im recalling it correctly.
It’s hard to believe this would be an over pressurisation event, because there are so many other parts of the manifold that are much weaker than that section.. The bottom pan is thin magnesium that regularly blows out (usually from corrosion though) the Y-pipe plenum that leads to the filters is just held on by 2 plastic clips. I would assume back pressure would blow that off long before that section. Even the plastic filter housing is brittle plastic. The PCV is also notoriously soft, and should have blown off the back if none of the previously mentioned options did not… I’m really curious on this one man
Any update?
As far as replacement, I checked a couple months back and you could still order a new I.M. From Mercedes for around 2k. Before shipping/tax. No idea how long the wait is tho. I don’t think it’s something they have sitting on the shelf. Needs made and shipped from Germany if im recalling it correctly.
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Wild stuff. Important to figure out what caused this because despite all the M156 intake manifold issues that people have been dealing with the over the years, the top shell blowing apart has not been one of them.
Over-pressurization can be a cause but if it was coolant / cooling system / head gasket related, there are other components that would fail first. Even if that pressure made it to the IM, I would expect those aluminum-foil bolts to fail well before anything else.
Too much oil and a completely overwhelmed PCV could also be a factor. Are you sure the engine wasn't over-filled at the last service?
Over-pressurization can be a cause but if it was coolant / cooling system / head gasket related, there are other components that would fail first. Even if that pressure made it to the IM, I would expect those aluminum-foil bolts to fail well before anything else.
Too much oil and a completely overwhelmed PCV could also be a factor. Are you sure the engine wasn't over-filled at the last service?
-The intake manifold pressure sensor has a malfunction.
-The position sensor for the intake camshaft (cylinder bank 1) has a malfunction.
-The position of the intake camshaft (cylinder bank 1) deviates from the specified value
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C63
Holy F*ck lol.. has the cause been determined yet?
It’s hard to believe this would be an over pressurisation event, because there are so many other parts of the manifold that are much weaker than that section.. The bottom pan is thin magnesium that regularly blows out (usually from corrosion though) the Y-pipe plenum that leads to the filters is just held on by 2 plastic clips. I would assume back pressure would blow that off long before that section. Even the plastic filter housing is brittle plastic. The PCV is also notoriously soft, and should have blown off the back if none of the previously mentioned options did not… I’m really curious on this one man
Any update?
As far as replacement, I checked a couple months back and you could still order a new I.M. From Mercedes for around 2k. Before shipping/tax. No idea how long the wait is tho. I don’t think it’s something they have sitting on the shelf. Needs made and shipped from Germany if im recalling it correctly.
It’s hard to believe this would be an over pressurisation event, because there are so many other parts of the manifold that are much weaker than that section.. The bottom pan is thin magnesium that regularly blows out (usually from corrosion though) the Y-pipe plenum that leads to the filters is just held on by 2 plastic clips. I would assume back pressure would blow that off long before that section. Even the plastic filter housing is brittle plastic. The PCV is also notoriously soft, and should have blown off the back if none of the previously mentioned options did not… I’m really curious on this one man
Any update?
As far as replacement, I checked a couple months back and you could still order a new I.M. From Mercedes for around 2k. Before shipping/tax. No idea how long the wait is tho. I don’t think it’s something they have sitting on the shelf. Needs made and shipped from Germany if im recalling it correctly.
Here are the codes that I had.
-The intake manifold pressure sensor has a malfunction.
-The position sensor for the intake camshaft (cylinder bank 1) has a malfunction.
-The position of the intake camshaft (cylinder bank 1) deviates from the specified value
