[ALL] : Engine Failures - Share Your Experience - Page 32
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Thread: Engine Failures - Share Your Experience

  1. #311
    OptimaForums Veteran carguy75's Avatar
    Join Date
    Feb 2015
    Location
    Lawrenceville,GA.
    Posts
    1,534
    Year
    2014
    Make
    KIA
    Model
    Optima
    Trim
    SXL
    Quote Originally Posted by CheeseDrink View Post
    Well thought I'd pitch in:

    2012 Optima SX, 65000km
    Injen intake, Warner intercooler, OCC's, BTR tune, turbo-back 3" exhaust

    Cruising at 100km/h at about 2000RPM, engine suddenly started getting a hesitation. Worstened until I reached next gas station, pulled over.

    Turns out a piston ring in Cylinder 2 lost a chunk into the oil pan. No compression.

    The remaining ring chowdered up the bore, so I needed a new short block.

    No warranty, due to the above mods. Additionally, since the failure came neither from oil starvation or the bearing issues, they couldn't swing a claim for me.

    Ended up sourcing a used 2014 engine from a wreck with 24,000km on it.

    Engine + labour for KIA to install was about $5000 all in.

    I believe the problem to have lied with the exhaust, as the engine was prone to over-boost conditions with the less restrictive exhaust. I was actually running about 2-3psi more boost than I thought, so it was probably a failure from that + high compression? Who knows. Stock exhaust is back on and no problems since.

    Lessons learned! Pictures here: Engine Replacement 2017 - Album on Imgur
    That sucks that your engine failed and you have to pay out of pocket to replace it.

    It sounds like you have this engine maxed out power wise.

    You must have been making well over 300hp on stock 2.0 turbo engine, however KIA did not build these engine to handle that kind of power for longevity like Mitsubishi did with the twin version of this engine in the EVO.

    2-3 psi of extra boost equals to about 20 or more horsepower plus extra heat and stress on the engine.

    The engine bearings can barely hold up in stock form with the marginal maintenance requirements specified by KIA.

    I can imagine how the rest of the engine handles been pushed pass it limits like in your situation with over boosting and power mods.
    Last edited by carguy75; 03-20-2017 at 09:10 PM. Reason: info
    2014 Black KIA Optima SXL loaded w/

    AEM dry performance drop-in air filter w/radiator cowl panel removed
    Hella yellow HID look H7 high beam light bulbs
    Running only Shell V-power 93 octane gas
    5w-40 Total Quartz 9000 Energy synthetic oil
    NGK ILKR8E6 spark plugs(1422)
    Bosch Icon wiper blades- 24A, 18A
    Black check-mark fog light trim
    Michelin Primacy MXM4 225/45-18 tires
    Hawk HPS 5.0 Front brake pads HB661B.667
    Centric Posi Quiet Ceramic Rear brake pads 105.15440

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  3. #312
    Riding Lawn Mower
    Join Date
    Jun 2014
    Posts
    44
    Year
    2012
    Make
    Kia Optima
    Model
    2012 SX
    Trim
    SX
    Quote Originally Posted by carguy75 View Post
    That sucks that your engine failed and you have to pay out of pocket to replace it.

    It sounds like you have this engine maxed out power wise.

    You must have been making well over 300hp on stock 2.0 turbo engine, however KIA did not build these engine to handle that kind of power for longevity like Mitsubishi did with the twin version of this engine in the EVO.

    2-3 psi of extra boost equals to about 20 or more horsepower plus extra heat and stress on the engine.

    The engine bearings can barely hold up in stock form with the marginal maintenance requirements specified by KIA.

    I can imagine how the rest of the engine handles been pushed pass it limits like in your situation with over boosting and power mods.
    Yep, was putting down 280hp/325lb-ft at the wheels. So maybe like 325/350 crank? Shame the piston rings were the weakest link!

  4. #313
    Newbie ejgss2001's Avatar
    Join Date
    Jun 2011
    Location
    Pennsylvania
    Posts
    8
    Another one down....

    2011 EX (non-turbo)
    83,000 miles (original owner)
    Driving along at 50 MPH, engine started hesitating before losing power. Never stalled. During tows, car started right away but was knocking like crazy.
    Had to authorize dealer to drop oil pan. One day later was informed KIA would warranty a new engine, but I was never given a diagnosis.
    Car was maintained a private garage (I gave copies of all receipts to dealer when the car was towed)
    KIA did not approve rental/loaner
    Due to pick up car this afternoon (at dealer since Friday 3/10).

    A relative had the engine in his 2014 non-turbo EX replaced last year at 14,000 miles under warranty. In his case, the issue was a sporadic oil light, though level was fine. Dealer contacted KIA who directed some teardown investigation before sending replacement engine. That dealer provided a loaner.

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  6. #314
    Riding Lawn Mower
    Join Date
    Jun 2016
    Posts
    56
    Model
    2013 SXL
    Seems like the BTR tune was the main factor. do you agree?

    ---------- Post added at 02:22 PM ---------- Previous post was at 02:19 PM ----------

    Quote Originally Posted by CheeseDrink View Post
    Well thought I'd pitch in:

    2012 Optima SX, 65000km
    Injen intake, Warner intercooler, OCC's, BTR tune, turbo-back 3" exhaust

    Cruising at 100km/h at about 2000RPM, engine suddenly started getting a hesitation. Worstened until I reached next gas station, pulled over.

    Turns out a piston ring in Cylinder 2 lost a chunk into the oil pan. No compression.

    The remaining ring chowdered up the bore, so I needed a new short block.

    No warranty, due to the above mods. Additionally, since the failure came neither from oil starvation or the bearing issues, they couldn't swing a claim for me.

    Ended up sourcing a used 2014 engine from a wreck with 24,000km on it.

    Engine + labour for KIA to install was about $5000 all in.

    I believe the problem to have lied with the exhaust, as the engine was prone to over-boost conditions with the less restrictive exhaust. I was actually running about 2-3psi more boost than I thought, so it was probably a failure from that + high compression? Who knows. Stock exhaust is back on and no problems since.

    Lessons learned! Pictures here: Engine Replacement 2017 - Album on Imgur
    Wouldn't the 3' exhaust (with it being less restrictive than say 2.25/2.5) be a good thing for over boost?

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