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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 256 (ENGINE SYSTEM)ASSEMBLYENGINEASSEMBLY
2010 Mercury Mariner Hybrid, AWD

Section 256 (Engine System): Assembly: Engine: Assembly

2010 Mercury Mariner Hybrid, AWDSECTION Assembly
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

    All engines 

  1. Record the main bearing code found on the front of the engine block.
    Fig 1: Identifying Main Bearing Code Found On Front Of Engine Block
    G04583819Courtesy of FORD MOTOR CO.
  2. Record the main bearing code found on the back of the crankshaft.
    Fig 2: Identifying Main Bearing Code - Found On Back Of Crankshaft
    G03886015Courtesy of FORD MOTOR CO.
  3. Using the data recorded earlier and the Bearing Select Fit Chart, Standard Bearings Chart determine the required bearing grade for each main bearing.
    • Read the first letter of the engine block main bearing code and the first letter of the crankshaft main bearing code.
    • Read down the column below the engine main bearing code letter, and across the row next to the crankshaft main bearing code letter, until the 2 intersect. This is the required bearing grade for the No. 1 crankshaft main bearing.
    • As an example, if the engine block code letter is "F" and the crankshaft code letter is "D," the correct bearing grade for this main bearing is "2."
    • Repeat this process for the remaining 4 main bearings.
      Fig 3: Bearing Select Fit Chart (Standard Bearings)
      G03886016Courtesy of FORD MOTOR CO.
  4. If oversize bearings are being used, use the procedure in the previous step and the Bearing Select Fit Chart, Oversize Bearing Chart to determine the required grade for each main bearing.
    Fig 4: Bearing Select Fit Chart (Oversize Bearings)
    G04583822Courtesy of FORD MOTOR CO.
    5. CAUTION: Before assembling the cylinder block, all sealing surfaces must be free of chips, dirt, paint and foreign material. Also, make sure the coolant and oil passages are clear.
  5. Lubricate with clean engine oil and install the crankshaft upper main bearings into the cylinder block.
  6. Install the crankshaft onto the upper crankshaft thrust bearing and main bearings.
    Fig 5: Locating Crankshaft And Upper Crankshaft Main Bearings
    G03886018Courtesy of FORD MOTOR CO.
    7. NOTE: To aid in assembly, apply petroleum jelly to the back of the crankshaft thrust washer.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.