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Wartsila’s User Group Forums 34 SG Wartsila Engine High exhaust temp. on one cylinder

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  • Author
    Posts
  • #2287
    balcerl
    Participant

    We have one cylinder A03 that has high exhaust temperature causing the engine to derate.  I am new to these engines and any advice would be greatly appreciated.  I have read something about valve clearances.

    #2288
    Stephen Layton
    Participant

    Does your engine have peak pressure sensors on the cylinders?  If so, a failing pressure sensor could cause this.  The press sensor can read lower than actual, causing more fuel to be injected to raise the pressure up, which results in higher exhaust temperature.  This is a common way a peak pressure sensor fails.

    Check your MFI Duration Offset as well and see it it increased along with increasing exhaust temperature.

    #2289
    dwight
    Participant

    (Natural gas units)We usually look at coil voltage first.  If outputting high then replace a plug.  We check the quick and easy things first.  If still dropping out check bridge clearances and adjust valves.   We are currently dropping cylinders and looks like may be plugs(if gas units).  We are also approaching a maintenance interval so could be a combination of things.   Have noticed that the plug gaps get pretty large at a couple of thousand hours of running.

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