Help ID this engine noise? Video attached

Discussion in 'General IH Tech' started by Randall Barringer, May 23, 2019.


  1. Randall Barringer

    Randall Barringer Y-Block King

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    The Scout runs fine, but when it gets warm it develops a tick.
    It was sitting for at least 15 years before I got it.
    I've had it running for about a year.
    Is this lifter noise?
    I had a daily driver V8 Scout years ago that had a tick, but it didn't sound quite like this.
    Vacuum readings are good on it.
    Any help appreciated.
     
  2. Gunfighter97

    Gunfighter97 Farmall Cub

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    My v8 has a couple lifters that tick, but mine needs an oil change/other maintenance badly. Unless you have alot of them ticking at once thats a much faster paced tick than mine. Mine you can tap your finger and easilly keep up.

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  3. 1975IH200

    1975IH200 High Wheeler

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    I would not call that a "tick".
    It sounds more like a total lack of engine oil or loss of lubrication to the valve train.
    Need to investigate.
     
  4. Randall Barringer

    Randall Barringer Y-Block King

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    How should I go about investigating?
    Thanks

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  5. 1975IH200

    1975IH200 High Wheeler

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    1. Check oil level. Bring it up to "FULL" mark.
    2. Determine what oil filter is installed. Brand name and part number.
    3. When was oil & filter last changed?
    4. Remove valve cover and determine if oil is flowing to the cylinder head/properly feeding the valve train.
    Report findings.
    Since it has been sitting 15 years, after doing the above items, I would drop oil pan, clean it out, remove oil pump pickup tube, replace the o-ring, reinstall pickup tube and oil pan. New gasket, New oil, new oil filter p/n NAPA 1515 (Spin-On) or p/n NAPA 1156 (Canister style) or other premium brand.
    Also, while the oil pan is off, clean the oil return drains in the cylinder head (fwd & aft).
     
    Last edited: May 23, 2019
  6. Randall Barringer

    Randall Barringer Y-Block King

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    Oil changed 200 miles ago and I used a wix 51156 filter.
    I'm in the process of changing the filter again (I have a lot of them) and will top off the 15w-40 oil.
    When I changed the valve cover gasket everything appeared to be getting oiled.
    I'll install an oil pressure gauge and see what kind of numbers I'm getting.
    Thanks

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  7. 1975IH200

    1975IH200 High Wheeler

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    Did you run the engine when the valve cover off and watch oil flow on the head/valve train?
     
  8. Randall Barringer

    Randall Barringer Y-Block King

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    I did not.
    I'll do that next.
    Thanks

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  9. 1975IH200

    1975IH200 High Wheeler

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    Good. At least it seems to be running OK, so you got that going for you.
    You might try to make your own engine stethoscope and try to find where the noise is coming from while it is running with valve cover off.
    Could be worn out valve train rockers or worn rocker shaft or similar.
     
  10. John Trumpe

    John Trumpe Farmall Cub

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    Mine sounds much like that. Frankly, those 152's are a noisy little bugger. Maybe run some lifter additive to free them up so they pump up better. Make sure you don't have a leak at the exhaust manifold that sounds like a lifter. They do indeed sound that way. John
     
  11. Randall Barringer

    Randall Barringer Y-Block King

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    Cold oil pressure is about 50 psi.
    I'll update with warm soon.[​IMG]

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  12. Randall Barringer

    Randall Barringer Y-Block King

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    I've tried the additives, no luck.

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  13. Randall Barringer

    Randall Barringer Y-Block King

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    Warm pressure is 40 PSI.
    Next, I'll pull the valve cover and make sure I'm getting oil up there. [​IMG]

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  14. Randall Barringer

    Randall Barringer Y-Block King

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    Edit:
    Warm is closer to 35 PSI.

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  15. BinderBookie

    BinderBookie High Wheeler

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    An engine stethoscope could help isolate the noise to a particular area.

    It sounds upper end to me. Rocker gear or lifter/flat cam lobe, etc. With the rocker cover off and the engine running, you may be able to get a better read on the sound. Also, watch each rocker individually as it runs to see if the apparent lift is about equal.

    Then, with the engine off, pull the spark plug (just so you can turn the engine over by hand more easily), rotate the engine to top dead center (piston at top, valves both closed but not on overlap) then grab the pushrods and see how freely they rotate and if you can move them up and down. Ideally they should rotate with some effort and there will be no up or down play. If there is, that indicates a lack of lifter preload.

    Lack of lifter preload could come from severely worn rocker pivots or shaft, a bad lifter or excessive cam lobe wear. Coupla other possibilities as well, including if the head gasket was replaced by a composite style (much thicker than tin), and that moves the head up away from the block and decreases lifter preload. Optimally, lifter preload (the amount the lifter plunger is pushed in... preloaded... into the lifter body is around .040-.060". You can get by with less but if you are barely preloaded and then the engine warms up, you can loose the little bit you have cold and then you get noise. If this is the case, the only practical cure is to get longer or adjustable pushrods to correctly preload the lifters.

    You need to proceed logically so you don't go down the wrong road. If you suspect a flat cam lobe(s) you can check cam lift with a dial indicator on the pushrods. The one with a lot less than the others is the culprit. If you have the cam lift specs, and check at the pushrod, you can actually measure lob lift and compare it with the book spec and get a read on the actual wear on cam lobe and lifter.
     
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  16. Randall Barringer

    Randall Barringer Y-Block King

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    I haven't started it yet, but this is what I have.[​IMG][​IMG]

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  17. 1975IH200

    1975IH200 High Wheeler

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    That looks too dry to me.
    Run it and video the oil flow.
     
  18. Randall Barringer

    Randall Barringer Y-Block King

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  19. 1975IH200

    1975IH200 High Wheeler

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    Weak oil flow. Probably worn cam bearings.
    Plenty of pressure at OP switch (main oil gallery) = good OP & flow at the crankshaft/bottom end.
    Weak oil flow at rockers = worn cam bearings.
     
  20. Randall Barringer

    Randall Barringer Y-Block King

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    Hmm.
    Great.
    So, just run it till it goes?
    Thanks for your help!

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