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C270cdi Issues

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by renrutp76, Nov 16, 2014.

  1. renrutp76

    renrutp76 Senior Member

    Messages:
    121
    Likes Received:
    2
    Joined:
    Mar 27, 2012
    Location:
    Chester
    Your Mercedes:
    X218/2014/CLS250CDI_W211/2005/E500 Avantgarde
    Just got my car back after 5 weeks! The reason it went in was that I snapped a glow plug. Rather than drilling and pulling out, I opted to have the head removed. My reasons for this were:-

    1. Paranoia (not wanting to drill through a coolant channel)
    2. To see what state the internals were in (car has done 230,000)
    3. To clean and modify the inlet manifold.

    Prior to the work being started, the car would be difficult to start, and would also cut out on EPC if I was a bit too heavy footed, I could also smell the fumes passing the plug.

    Now, car wont restart first time when warm (2nd/3rd time it fires). I can also smell exhaust fumes in cabin. Car is going back in on Tuesday, any ideas anyone?
     
  2. rpe2

    rpe2 Senior Member

    Messages:
    2,861
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    2
    Joined:
    Sep 25, 2006
    Location:
    Silchester
    Your Mercedes:
    His: 2018 E220 d; Hers: 2016 SMAX
    Injector failing or fuel pipe seals.
     
  3. OP
    renrutp76

    renrutp76 Senior Member

    Messages:
    121
    Likes Received:
    2
    Joined:
    Mar 27, 2012
    Location:
    Chester
    Your Mercedes:
    X218/2014/CLS250CDI_W211/2005/E500 Avantgarde
    Hi Richard,

    All fuel line seals replaced while head was off. Injector is a possibility, but starts fine when cold, and runs ok when hot, just won't start if hot. I was more concerned about the fumes, I have blanked off the air intake with cardboard so the heater only draws from the cabin. One suggestion is that the timing chain has stretched , and inlet valves are slightly open on the combustion stroke.

    Does this sound plausible?
     
  4. turbopete

    turbopete Senior Member

    Messages:
    14,204
    Likes Received:
    319
    Joined:
    Feb 4, 2009
    Location:
    Spennymoor
    Your Mercedes:
    2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
    EPC with heavy foot usually points to injector leaking off excessively, possibly creating more of a hot start issue as the fuel will be warmer and therefore thinner and flow through the leak-off system easier than when cold, hence taking a couple of attempts for the fuel to get to the right pressure when on a hot start but no issue when cold
     
  5. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    289
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Interesting one on the chain, 230,000 miles is some mileage in 4 years.
     
  6. Ricardo_e220

    Ricardo_e220 Senior Member

    Messages:
    1,235
    Likes Received:
    80
    Joined:
    Sep 16, 2012
    Location:
    Newcastle upon Tyne
    Your Mercedes:
    R170 SLK230k 1999
    If his profile is correct its a 2002, Malcolm, so 12 years old and thus normal annual avg miles.

    Fumes must indicate that something somewhere is leaking. Are the plugs fitted correctly.
     
  7. OP
    renrutp76

    renrutp76 Senior Member

    Messages:
    121
    Likes Received:
    2
    Joined:
    Mar 27, 2012
    Location:
    Chester
    Your Mercedes:
    X218/2014/CLS250CDI_W211/2005/E500 Avantgarde
    Thanks all for your replies. Cold start this morning was fine as usual, but rather than go to work, I had a doctors appointment, which involves a 1/4 mile steep climb. as I accelerated up the hill the car had no power, and was surging, classic torque converter failure. Doctors appointment over, car had cooled sufficiently (good old NHS). Got it home, and decided to check ATF level, before I took it back to the garage for them to take a look. with ATF temp at 79'C the ATF level was on the minimum mark for 20'C scale :-o. Topped the level back up, and just as I shut the garage door, the engine stopped. I got back to the open bonnet just in time to see the fuel heading back to the filter. lots of cranking and fuel lines still wouldn't fill. After 5 mins of checking everything was tight, I noticed the filter to LP pump plastic hose was trapped by the HP pump discharge line and had been squashed. I rerouted the line and reshaped, but still couldn't get it to draw fuel. Had too much to do so had to leave it there. Mechanic coming out tomorrow!!!
     

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