2008 clk 320 cdi sport - engine noise

[NickStone]

Thank you all for your input

I'm just sat having a few beers with a good mate, trying to figure out what's changed/cause...

How's this for a theory..
It's had oil/filter changed 3k miles before I bought it at a local garage (Possibly wrong oil, maybe) and car driven very sensibly.

I've bought it and driven it like I've stole it, dislodging soot and carbon that's got into the vnt on turbo exhaust side causing the vnt's to stick which in turn is causing over boost conditions on inlet on throttle lift.

Thoughts?

Thanks again for all your input and suggestions

 

[OneForTheRoad]

the actuator arm seems to be moving ok, if it was over boosting id suspect it to stay in the up position and put the car into limp mode. have you scanned the ecu for codes which suggest "over boost " ?

 

[Trickythemerc]

Any boost pressure deviation would throw the EML on and show a code.

 

[ExMercTech]

Sounds like induction noise.

Check you have the rubber boots on correctly especially underneath.
Check the condition of the red seals the large one looks swollen
Put the correct clip on the large red seal its not sitting right.
Check the plastic around the seals they have been know to crack/split.

 

[NickStone]

Good morning

After finally changing different apps and OBD2 Bluetooth connectors, I had some success last night at reading fault codes using Torque Pro off my tablet.

Contrary to my original statement of no fault codes, there's a few been thrown up as follows:

Vehicle VIN: Not present
Vehicle Manufacturer: Unknown
Vehicle Calibration ID: Not present

Current Fault Log
------------------
ECU reports no current faults

Pending Fault Log
------------------
ECU reports no pending faults

Historic Fault Log
------------------
ECU reports no historic faults
Other discovered fault codes
(possibly pending, current or manufacturer specific)
----------------------------------------------------
P2094: B Camshaft Position Actuator Control Circuit Low bank2 c)
P2095: B Camshaft Position Actuator Control Circuit High bank2 c)
P2511: ECM/PCM Power Relay Sensor Circuit Intermittent
P2600: Coolant Pump Control Circuit/Open
P2601: Coolant Pump Control Circuit Range/Performance
P2602: Coolant Pump Control Circuit Low
P2603: Coolant Pump Control Circuit High
P2627: O2 Sensor Pumping Current Trim Circuit Low bank1 Sensor1
P3052: Unknown code - More information may be available on the web
P3053: Unknown code - More information may be available on the web

End of report.

 

[NickStone]

A good friend lent me his snap-on diag tool.

Scanned and the faults came up.

Reset them and just been out on a 30min drive on dual carriageway and town center

Rescanned and none of the faults have reappeared, but still getting the noise....

 

[NickStone]

After further investigation, it turned out to be the turbo.

Tremendous joy!

 

[toolman1954]

Is this " tremendous joy " resulting from the fact that you have located the problem, or the fact that the Turbo may need repair or replacement.

Steve.

 

[OneForTheRoad]

I suspect the latter.

 

[NickStone]

Definitely the latter .

It's still under warranty so hoping the dealer sorts it without any hassle.

From what I've been told the bearing/seal between hot and cold side is knackered and allowing pressure to blow back through inlet.

Thank you again for everyone's help and ideas.