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3.7 Engine is DEAD!!!

Discussion in '2011-2014 V6 Mustang Tech' started by vinniertr, Sep 11, 2016.

  1. vinniertr

    vinniertr Member

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    I have a 2012 Mustang with 3.7 engine. I was coming to a stop light and it started shaking and making a clanging noise. I turned it off and tried to start it back up and it would just click! Engine is locked up!! It is stock and driven a little hard at times but nothing real hard. It has 106K miles. I have used Mobil 1 since I bought it new and always used a factory oil filter. I took the upper intake off and saw cylinder 1 had one valve gone and one bent with a piece of a piston ring caught in it. The spark plug on that cylinder has been hit with the piston. I think the piston broke and caused all the damage. I have not heard of any problems like this from these engines. I know some people put tunes and even nitrous on them with no problems. I was just wondering if anyone on here has heard of piston coming apart and causing such damage. Looks as if I am going to have to get a salvage yard engine installed.
     
  2. falconguy

    falconguy Member

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    Never heard of it but I do know that a failure of the water pump on these engines can demolish them. The aluminum wall on the block is thin and it is my understanding that the pump failure can break into the engine and destroy it.
     
  3. Phil II

    Phil II Cone Destroyer Staff Member

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    Got some pics of the carnage?

    Your misfortune is literally the very first story of such mishaps I have read.
     
  4. falconguy

    falconguy Member

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    I never had the problem but I had a noisy pump and since the engine only had 6,000 miles on it, I did an internet search and found there have been some pump failures that resulted in a demolished engine. I replaced the pump as a preventative measure. Problems with the 3.7 are few and far between