OEM Dodge Stratus Exhaust Valve

Dodge Stratus Exhaust Valve Parts and Q&A

• Exhaust Valve
  4648613
  Q: How Are Exhaust Valves and Intake Valves Inspected and Reworked for Optimal Performance on Dodge Stratus?

  A:

  Intake and exhaust valve seat angles and valve face are set at 45°. Once the valves are refaced, look closely at the remaining margin; if the intake is less than 0.95 mm (1/32 inch) and the exhaust is less than 1.05 mm (3/64 inch), replace them with differently-sized ones. Select the proper size pilot for valve guide when refacing valve seats so you can reseat a true and complete seat surface. Set up the valve seat runout dial indicator and make certain the entire runout doesn't reach more than 0.051 mm (0.002 inch). Prussian blue the valve seat to check if they touch, coat the seat with a bit of Prussian blue, insert the valve and turn it slowly but gently. A good contact is indicated when blue deposits appear in the center of the valve face. If burrs form at the valve seat's top, decrease the angle by one stone covered in 15 degree grit; if the burrs form at the valve seat's bottom, raise the angle using a 65 degree stone. If the valve seats are worn or burned, you can repair them so long as the angle and width are as required, but if the width isn't right, you have to replace the cylinder head. The suitable width for intake and exhaust seats is between 0.75mm and 1.25mm when the seat is properly fitted. After finishing the seats or faces, look at the valve tip to spring seat dimensions A, grind the valve tip to meet specifications and measure the distance from valve tip to spring seat after it is installed in the head. Chances are, the valve tip needs to be reground to ensure the seal isn't damaged when the valve is installed.
• Exhaust Valve
  MD306183
  Q: How to Service and Repair Exhaust Valve and Intake Valves on Dodge Stratus?

  A:

  Begin by removing the cylinder head(s) and the valve spring before doing a valve service and repair. Eliminate any burrs in the valve stem lock grooves prior to taking out the valves so the valve guides are safe. One by one, carefully remove the valves, trying to keep track of which ones go where so you don't put them back incorrectly. First, smear engine oil onto the valve stems and then insert them into the cylinder head during installation. If you have reground the valves or seats, the intake valve must not measure more than 47.59 mm (1.8737 inch) and the exhaust valve must not measure more than 49.14 mm (1.9347 inch). Should a valve tip be above these guidelines, grind it down until the measurement matches that of the cylinder head, from top to bottom of the stem. In the last step, install the valve spring.