OEM 2007 Dodge Nitro Intake Valve

2007 Dodge Nitro Intake Valve Parts and Q&A

• Q: How Can Exhaust Valve and Intake Valve Seats Be Reworked to Ensure Proper Refacing on 2007 Dodge Nitro?

  A: If valve seats become damaged and worn, they can usually be repaired, so long as the correct angle and seat width are used; otherwise, the head should be replaced. It is necessary to use the suitable size valve guide pilot when refacing valves and seats, so that the reseated stones give you a proper and finished surface. Initially, place a dial indicator at the valve seat's center hole and make certain that when you move it up and down, the total run out is no greater than 0.051 mm (0.002 in). Cover the valve seat with Prussian blue, set the valve into position inside the cylinder head and then gently turn it as you apply pressure. Once the valve has been removed, look at the face; if blue extends right under the top edge, lower the valve seat by using a 15 degree stone and if it goes up around the bottom edge, raise the seat with a 65 degree stone. Both the intake and exhaust seats should measure 1.75 - 2.36 mm (0.0689 - 0.0928 in.) when the seat is centered on the cylinder. Workers must make sure that installing the springs does not allow the valve spring installed height to pass beyond 40.74 mm (1.6039 in.) for all valve springs. The face angle between the valve seat and valve face should be 44.5 - 45° lastly.