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04 Mach 1 Engine noise

Discussion in 'Mach 1' started by Blue04Mach1, Sep 13, 2017.

  1. Blue04Mach1

    Blue04Mach1 New Member

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    Hey everyone. I just picked up this car for pretty good deal. I knew before I bought it that the engine was going to require some work if not a complete overhaul. That does not concern me at all as I intend to keep this car for quite awhile. The guy that I bought it off had it towed to the local Ford dealership and they started it once and figured it was a piston or wrist pin. It seams to be coming from the passenger side.

    I was just wondering if anyone here might be able to narrow down what I should look at first. The car has 83,000 miles on it. I don't believe there are any major mods other then full exhaust and CAI. Oil pressure is reading good on the gauge. Oil level is good. I know a lot of you have loads of experience with these engines so I wouldn't mind hearing your opinions. I'll post a link to the video so you can hear the sound that it is making.



    Any help would be greatly appreciated. Thanks!
     
  2. 4a7191a

    4a7191a Well-Known Member Established Member

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    Ugh that sounds bad.
    Let us know what you find. I'm sure it'll have to be tore into.
     
  3. MackDombles

    MackDombles Member Established Member

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  4. Blue04Mach1

    Blue04Mach1 New Member

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    Will do. I'm going to start the removal in the next week or two.
     
  5. Blue04Mach1

    Blue04Mach1 New Member

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    There are zero vibration issues at idle. Runs quite smooth, just a little noisy...lol
     
  6. CobraBob

    CobraBob Authorized Vendor Premium Member

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    Wow, that's pretty bad. Let us know what you find out when you start pulling the motor apart.
     
  7. MackDombles

    MackDombles Member Established Member

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    I wish I could hear that in person. From the video it sound anywhere from a Bad exhaust leak on one cylinder, to a blown out spark plug. Obviously with a smooth idle the plug is out of the question. Do you have headers?

    Sent from my SM-G930V using the svtperformance.com mobile app
     
  8. MackDombles

    MackDombles Member Established Member

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    I know it also could be worse than what I suggested, but I tend to use occams razor as my first tool.

    Sent from my SM-G930V using the svtperformance.com mobile app
     
  9. Blue04Mach1

    Blue04Mach1 New Member

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    Yes it does have full length BBK headers installed not that long ago. Its funny, my wife's uncle said the same thing about maybe being a bad exhaust leak. Maybe I'll have to get a stethoscope and do a bit more investigation. If it is just an exhaust leak I got the best deal ever.
     
  10. MackDombles

    MackDombles Member Established Member

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    It sounds like a single cylinder is just missing the gasket. I sure hope that's it. Could even be a cracked header.

    Sent from my SM-G930V using the svtperformance.com mobile app
     
  11. HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

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    Definitely sounds like an exhaust leak close to the head.
     
  12. MackDombles

    MackDombles Member Established Member

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    Listen for the last noise it makes after you shut the key off in the vid. It is a compression release after the engine stops. Milliseconds but it's there. I'm not sure anything inside Is still moving that could cause that after shut down. Maybe I'm hearing things. Or maybe the video masks something.

    Sent from my SM-G930V using the svtperformance.com mobile app
     
  13. Blue04Mach1

    Blue04Mach1 New Member

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    No you are right. It was very obvious when it was shut down. I thought it was a little odd.
     
  14. Kcobra99

    Kcobra99 Member Established Member

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    That sounds a lot like a spark plug blowout, usually hear a bit more escaping air coming out though.


    Sent from my iPad using Tapatalk
     
  15. Blue04Mach1

    Blue04Mach1 New Member

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    I'm pulling the passenger side spark plugs right now actually.
     
  16. Blue04Mach1

    Blue04Mach1 New Member

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    So I pulled all the spark plugs. They were all still tight. I found quite a bit of oil in the coil area on the passenger side though.

    I'll check the exhaust manifold next just to eliminate that before I start pulling the engine.
     

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