_____Change the timing gear set on my 2.2L Chevy?_____...Problem Found...

Discussion in 'The Garage' started by Blain, Aug 9, 2009.

  1. Blain

    Blain Lifer

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    Problem Fould... :thumbsup:

    My S10 2.2L has an odd knocking/scraping sound.
    Sounds similar to valve chatter, but heavier. Yet it's not as heavy as a rod knock.
    It gets louder with higher RPM, but the noise isn't syncronis with RPM, if that makes any sense.
    My temp and oil pressure are fine.

    Somone suggested that it may be my timing chain tensioner. So I figured it wouldn't cost me much to find out.
    From the Pic of the gears and tensioner, you can see that the tensioner isn't wore down to metal. There is a bit of wear on the gears, but nothing out of the ordinary.

    I'm going to be out about $12 for a gasket set to put the thing back together.
    Should I also go ahead and sink another $45 for the gear and tensioner set?

    BTW, Someone else suggested that my problem may be a bad lifter.
    But in the back of my mind, I keep thinking that a bad lifter would sound more in sync with the RPM.

    Thanks for your input
     
  2. Vette73

    Vette73 Lifer

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    How many miles on it?

    Also is the chain have a lot of play? Are there wear markes on the cover showing the chain is slapping?
     
  3. Blain

    Blain Lifer

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    About 150k
    The chain flexes about 3/4-1" when off the gears
    I didn't see any signs of chain wear on the cover
     
  4. funboy6942

    funboy6942 Lifer

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    wrist pin knock, the rod that holds the piston to the crank has failed which is why its not as loud as a rod knock, louder with speed but doesnt go with it because the pin is flopping around in the piston, so it may not go even with rpm range, but gets louder with the rpms. Can also be piston slap.

    Motor is toast, time to look for a new one and dont sink the chain money into the pit.
     
  5. funboy6942

    funboy6942 Lifer

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  6. Blain

    Blain Lifer

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  7. exdeath

    exdeath Lifer

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    Timing chains make an erratic rattling or linear ticking sound that sounds faster than RPM (many chain links passing by the problem area per revolution) and can go away at higher RPM when the speed and tension increases. If it's a fairly regular and periodic sound, it's most likely not the chain.

    Though for $45, you might as well do it while it's apart and have the piece of mind that you can rule out that area for problems. Quick internet research indicates timing chain guides are a problem area on the Chevy 2.2.

    On your picture, the section on the long guide at the bottom near the crank looks to be getting a little thin, as you can see the dark spot from the metal underneath. Compare to http://***/m7agy5. I'd go ahead and replace it now even if it's not the source of your noise.
     
  8. Eli

    Eli Super Moderator<br>Elite Member
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    Nice diagnosis. :)

    I would go ahead with the timing chain repair, and drive it into the ground. I bet it will last a whole longer as long as you don't thrash it.
     
  9. Blain

    Blain Lifer

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    Well the little 2.2 has its issues.
    I didn't want to do anything major, but at this point I think I'm going to do a rebuild.
    Does anyone know of a product that's cheaper than Restore.
    Would using the 8 cylinder Restore give me twice the engine life as using the 4 cylinder can, in my 2.2L?
     
  10. radioouman

    radioouman Diamond Member

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    And you are going to do a rebuild? :confused: Does tightening the head bolts to twice the torque make the head gasket last twice as long?
     
  11. Blain

    Blain Lifer

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    That's just cooky talk! :p

     
  12. thedarkwolf

    thedarkwolf Diamond Member

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    Does it get quieter or louder as the engine warms up? Piston slap will get quieter and really isn't a big deal.
     
  13. Eli

    Eli Super Moderator<br>Elite Member
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    /falls out of chair
     
  14. Blain

    Blain Lifer

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    After disassembling the front of the engine, I found the chain tensioner to be intact.
    The gears do show some wear, but nothing beyond what should be expected given the mileage.

    > Chain & gears

    While cleaning the timing cover up in preparation for reassembly I found the problem.

    The chain was loose and hitting the timing cover.
     
  15. crosshairs

    crosshairs Golden Member

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    See, you wasted your money....a can of restore would have shrunk that chain right up...:)
     
  16. Blain

    Blain Lifer

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    True, but like my brother-in-law says...
    "It only costs a little more to fly First Class" :p