Genuine Pontiac Phoenix Exhaust Valve

Pontiac Phoenix Exhaust Valve Parts Questions & Experts Answers

• Valve, Exhaust (Std)
  10034162
  Q: How should the heads of the valves be examined and what steps should be taken if pitting or burning is present on Pontiac Phoenix?

  A: Heads of the valves should also be inspected for pitting and burning especially on the exhaust valves and also the valve seatings. If pitting is small, it can be rectified by rubbing the seats and valves together by coarse and then fine grinding paste. To grind the valves, one should put some carborundum paste on the seat face and using a suction grinder on the valve head, that should be rotated in semi-rotary mode and the valve lifted occasionally to spread the paste. Once a flat and impending casting luster is attained to both surfaces, wash off the paste and reinforce the procedure using fine carborundum paste and turn and lift the valve accordingly. It can be made easier with a light spring under the valve head. Grinding is said to be completed when a uniform non-directional smooth light grey matte surface is achieved. If there is severe pitting or burning, the valve must be taken to a dealer and the seat recut; if the refacing leads to a reduction of valve head margin width beyond the limits that are set, the valve will have to be replaced. Last of all, scrapped all carbon from the valve head and stem, cleaned the ports and valve guides of any grindings and cleaned the valves and seats with a damp rag followed by a dry rag and ended with an air line if available to ensure the parts are sightly clear.