OEM Jeep Liberty Exhaust Valve

Jeep Liberty Exhaust Valve Parts and Q&A

• Valves
  5142764AA
  Q: How Can Exhaust Valve and Intake Valve Seats Be Reworked to Ensure Proper Refacing on Jeep Liberty?

  A:

  Repairs on worn or burned valve-seats should still keep the seat's angle and width or else a new cylinder head must be fitted. It is very important to match the guide pin size when refacing valves and valve seats, so that seating the stones produces a sound surface. The first step is to use a dial indicator on the center of the valve seat, checking that total run out stays below 0.051 mm (0.002 inch). Apply Prussian blue to the valve seat, insert the valve into the head of the cylinder and as you apply slight pressure, rotate the valve. If the blue appears under the valve top, lower the seat using a 15 degree stone; if it appears on the bottom edge, lift the seat with a 65 degree stone. The measured widths of both the intake and exhaust seats must be 1.75 - 2.36 mm (0.0689 - 0.0928 inch) and 1.71 - 2.32 mm (0.0673 - 0.0911 inch), respectively. Ensure the installed height of the valve spring is no more than 40.74 mm (1.6039 inch) for all valve springs after refacing. A valve seat and valve face angle between 44.5 and 45° is required.
• Exhaust Valve
  53021916AB
  Q: How to Remove and Replace the Exhaust Valve and Intake Valve in the Left Cylinder Head on Jeep Liberty?

  A:

  Begin by greasing the valve stem in clean engine oil and adding the valve opening into the left cylinder head. Next, add the valve stem seal in place and check that its top which holds the garter spring, is secure. After that, install the spring and the spring retainer. Compress the spring with the compressor and put both parts of the valve spring retainer on top of the spring. After opening the valve spring compressor, check that both of the spring retainer halves and the spring retainer are in place. Wipe engine oil onto the Camshaft journal, slide the camshaft with the sprocket dowel placed at 11 o'clock on the left and at 12 o'clock on the right and then secure the camshaft bearing caps in place. Join the camshaft bearing cap retaining bolts and tighten them with a torque of 9-13 Nm (100 in. lbs.), turning each bolts only 1/2 turn at a time, using the advised sequence. After that, set the hydraulic Lash Adjusters and Rocker Arms into place.