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Oil Leak



I have a 2010 half ton silverado with a 5.3. I was looking at my skid plate and there was oil on it. I got to looking around and there is a line that comes from the bottom of the fan/ radiator assembly that was covered in oil. I checked my oil level and it is fine. Is this a major issue. Please clarify thanks

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Check your oil cooler lines. I had a leak from one of mine last December. See the attached photo. That is the line it was leaking from (as seen from the engine bay looking down). The oil would collect on the skid plate/ground. Wasnt a ton but enough





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Sorry to dig this one back up, but I have a similar leak. Mine is on the drivers side (oil cooler for sure), and it is leaking at the connection that connects to the radiator support. Would I have to replace the lines all the way back to the oil filter, or can I just get new gaskets/O-rings, or whatever else seals up the connection there?

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engine oil cooler line set is 1 peice deal ,it comes with a new gasket ,,,,it connects above the engine oil filter



Document ID: 642614

Engine Oil Cooler Hose/Pipe Replacement (6.0 L

Removal Procedure

  1. Perform the following steps on both the upper and lower
    radiator quick connect fittings:
    1. Disengage the plastic caps from the quick connect fittings.
      Pull the caps back along the pipes.

    2. Hold one leg of the retaining clip.

    3. Using a small pick-type tool (or bent screwdriver) gently
      pry the other end of the retaining clip from the quick connect fitting.

    4. Rotate the retaining clip out of the quick connect fitting.
      Remove the retaining clip completely.

    5. Discard the OLD retaining clips.

  2. Remove the oil cooler pipes from the retainer clip.

  3. Gently pull the oil cooler pipe fittings straight out from
    the radiator quick connect fittings.

  4. Raise and suitably support the vehicle with safety stands.
    Refer to Lifting and
    Jacking the Vehicle
    in General Information.

  5. Remove the engine shield bolts.

  6. Remove the engine shield.

  7. Remove the oil cooler hose bracket bolt (1).

  8. Remove the oil cooler hose adapter bolts (2).

  9. Remove the oil cooler hose/pipe assembly and gasket. Discard
    the gasket.

  10. Inspect the fittings, connectors and cooler pipe for damage or distortion.

Installation Procedure


  • Prior to the installation of the engine oil cooler hose/pipe assembly,
    install NEW retaining clips to the quick connect fittings.

  • Ensure that the oil cooler hose/pie assembly being installed has plastic
    caps on the ends of the pipes. If no plastic caps exist, or the plastic cap is
    damaged, obtain a new cap. Install the cap on to the cooler line prior to cooler
    line installation.

Important: Failure to properly install the retaining clip could cause
the cooler line to come loose and cause damage to the engine.


  • Do not use the plastic cap in order to install the cooler line into the

  • Do not manually depress the retaining clip when installing the plastic cap.

  1. Do not install the NEW retaining clips onto the fitting by
    pushing on the clip.

  2. Install the NEW retaining clip into the quick connect
    fitting by using your thumb and forefinger. Insert the new retaining clip into
    one of the three fitting recesses. Ensure that the retaining clip is engaged in
    all 3 slots.

  3. With one end of the retaining clip engaged in the connector
    fitting slot, use your thumb in order to rotate the retaining clip around the
    connector fitting, until the retaining clip snaps into place.

  4. Ensure that the 3 retaining clips ears are seen from inside
    the fitting and that the retaining clip moves freely in the fitting slots.

  5. Install NEW retaining clips into the remaining quick connect

  6. Install the oil cooler hose/pipe assembly and a NEW gasket.

    Notice: Refer to Fastener Notice in Cautions and

  7. Remove the oil cooler hose adapter bolts
    Tighten the oil cooler hose adapter bolts to 12 Y (106 lb in).

  8. Remove the oil cooler hose bracket bolt
    Tighten the oil cooler hose bracket bolt to 25 Y (18 lb ft).

  9. Install the engine shield.

  10. Install the engine shield bolts.
    Tighten the engine
    shield bolts to 20 Y (15 lb ft).

  11. Lower the vehicle.

    Important: A distinct snap should be heard when assembling cooler pipe
    fittings to the quick connect fittings. To insure the pipe is fully inserted
    into the quick connect fitting, check by giving the pipe a forceful tug.

  12. Firmly push the oil cooler pipe fittings straight into the radiator quick
    connect fittings.

  13. Install the oil cooler pipes to the retaining clip.

  14. Install the plastic caps onto the quick connect fittings.

  15. Snap the plastic cap onto the quick connect fitting.

  16. Ensure that the plastic cap is fully seated against the fitting.

  17. Ensure that no gap is present between the cap and the fitting.

  18. Ensure that the yellow identification band on the pipe is hidden within the
    quick connect fitting. A hidden yellow identification band indicates proper
    joint seating.

  19. Run the engine. Inspect the engine oil cooling system for leaks.

  20. Inspect the engine oil level. Add oil if necessary.
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