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Adjusting Ford Ranger V-6 Valves

V-6-171 Engine
When checking valve clearance, insert feeler gauge between valve tip and rocker arm at front or rear of valve tip and move gauge in a forward or rearward motion parallel to the crankshaft center line. If feeler gauge is inserted at outboard edge and moved perpendicular to crankshaft center line, a false indication will be given, resulting in tight valve clearance.

  1. Remove rocker arm cover.
  2. Rotate engine slightly until cylinder No. 5 intake valve just begins to open. This can be verified by placing a finger on intake valve rocker arm adjusting screw for cylinder No. 5 and feeling for movement while turning engine.
  3. Adjust intake and exhaust valves on No. 1 cylinder to .014 inch for intake valves and .016 inch for exhaust valves, by tightening or loosening adjusting screw as necessary.
  4. Adjust remaining valves in firing order by positioning cam according to chart.
To adjust both valves
for cylinder number:
1 4 2 5 3 6
The intake valve must be
opening for cylinder number:
5 3 6 1 4 2

Valve Arrangement Front to Rear
V-6 171 Right Bank I E I E E I
V-6 171 Left Bank I E E I E I
V-6 177 Right Bank E I E I E I
V-6 177 Left Bank I E I E I E

Additional Information provided courtesy of AllDATA


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