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2015 4Runner Engine Knock

Discussion in '5th Gen 4Runners (2010+)' started by Cdaily98, May 11, 2019.

  1. May 11, 2019 at 7:07 AM
    #1
    Cdaily98

    Cdaily98 [OP] New Member

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    I recently purchased a 2015 4Runner that has developed a significant engine knock. It can be heard in the cab when your in the driver seat and in the wheel well driver side. Any advice on what it might be? I get the light Toyo tick but the louder metallic sound seems out of the norm.
     
  2. May 11, 2019 at 5:13 PM
    #2
    j cat

    j cat New Member

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    massachusetts
    spacer lift front 1inch

    sounds like lifter tick .. all lifters.. engine knock is lower freq ... cluck sound ..
    what oil used ? 0-20wt synthetic is proper . also if the oil has some sludge try to add 5OZ of MMO .. marvel mystery oil in the oil .. only use 5OZ.. if the ticking is reduced then change the oil should be good.. if no change can be engine / cam / oil pressure problem .. engine damage .
     
  3. May 12, 2019 at 5:59 AM
    #3
    Cdaily98

    Cdaily98 [OP] New Member

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    Using the specd oil, had Toyota do an oils check just to if it would help and it didn’t. Added Lucas Oil additive and seafoam, didnt help.

    If it’s an oil pressure issue wouldn’t the pressure sensor trip?
     
  4. May 13, 2019 at 5:43 AM
    #4
    j cat

    j cat New Member

    Joined:
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    Member:
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    Messages:
    379
    massachusetts
    spacer lift front 1inch
    the oil sensor is a switch .. no pressure light comes on.. low oil pressure can cause the noise.

    what oil did you use ? name viscosity and who installed the oil .. toyota oil filter ?
    IMO do not use seafoam in the engine oil .. that will damage the engine internals ... MMO is a additive that increases the detergents and breaks down any sludge and lifter debris ,, seafoam is a solvent .. not an oil detergent ..

    I would change the oil and filter see how the engine operates .. oil drain takes 45 min .. then if it still makes the ticking add 5OZ of MMO to the oil and drive it for a few hundred miles .. if no change then internal damage. cam /lifters etc..
     

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