Rattling noise on start up

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by mclark, Jun 4, 2017.

  1. mclark

    mclark SHO Member

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    2010 ford taurus sho with 75,000 miles on the clock . On cold start up the engine rattles for about 2 to 3 seconds then the engine is quiet . Have done a little research and have read that this is a common issue with this engine. I use motor craft oil filter and motor craft synthetic blend oil . Any info about this issue will be helpful .
     
  2. glockcoma

    glockcoma SHO Member

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    It's the timing chain tensioners "ratcheting" out on the chain guide.
    It's pretty common on 2010-12 MY.

    The tensioners lose oil pressure from the check valve or anti drain back valve on the oil filter.

    If it get bad enough you will throw a DTC as the tensioners can no longer extend enough to adjust the vvt.
    If you completely depress the gas pedal when starting it will just crank and crank. This will build oil pressure before the engine starts and the noise will not be as noticeable.

    I've had this issue on my 2010 since about 25,000 miles it has not gotten any worse.(54k now)
    I just use a high-quality oil and a Motorcraft oil filter and it seems to help.
     
    Last edited: Jun 5, 2017
    markathome and SHOdded like this.
  3. rubydist

    rubydist Moderator Staff Member

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    I have noticed on some of the Motorcraft oil filters, the check valve seems to start leaking after a month or so, and then you get more of the startup clatter.
     
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  4. SilverSH0

    SilverSH0 SHO Member

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    While true, this only masks the sound while the engine is cranking. The engine is still making that noise but you don't hear it over all the other noises.
    Mine makes the noise and at some point you actually stop noticing.
     
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  5. markathome

    markathome 2010 SHO

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    Ditto

    Sent from my XT1094 using Tapatalk
     
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  6. Jeff2017

    Jeff2017 SHO Member

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    Isn't the filter opening facing up? If so, how could it ever drain?
     
  7. SilverSH0

    SilverSH0 SHO Member

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    It's not about the direction the opening faces when talking about draining. Try this experiment to show the concept or idea. Take a hose (or some tubing), hold both ends at the same height, and fill it up with water until the entire tube is full. Now with both openings facing up, lift one end of the hose while holding the other in place. What happens? The water drains out the lower end even though the opening is facing up. In a line, while there is liquid at a higher elevation (thus pressure) than the lower opening it will flow out that opening regardless of the opening direction.

    The same thing happens in an engine. Oil that is still in the supply line up towards the top of the engine will be pulled down backwards through the oil filter (if there's no check valve) and into the oil pan (lowest opening). With a check valve it will not let the oil flow backwards and keeps it "primed" in the supply line. If it's "primed" in the line then that line doesn't have to fill with new oil once you start the car.
     
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  8. rubydist

    rubydist Moderator Staff Member

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    that was a much better description of how that works than I could have done, thanks!
     
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  9. Jeff2017

    Jeff2017 SHO Member

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    I see. That makes sense. Thx!
     
  10. moonie

    moonie SHO Member

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    I was wondering why I noticed it on my 2011 but my 2016 doesn't do it at all.
     

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