Jet Valve Adjustment
- Before adjusting, note the following:
- Misadjusted jet valve clearance will adversely affect emission levels.
- Adjust jet valve clearance before adjusting intake valve clearance.
- Before adjusting jet valve, retighten cylinder head bolts (cold) to 51-64 ft. lbs. (69-86 N.m) on 1.4L and 1.6L engines or 65-72 ft. lbs. (87-97 N.m) on 2.0L and 2.6L engines.
- Adjust jet valve clearance with intake valve adjusting screw fully loosened.
- With engine at normal operating temperature, stop engine, remove rocker cover and position appropriate piston at TDC of compression stroke.
- Back off intake valve side adjusting screw 2 or more turns. Loosen lock nut on jet valve adjusting screw.
- Back off jet valve adjusting screw (counterclockwise) and place 0.006" (.15 mm) feeler gauge between top end of jet valve stem and bottom end of adjusting screw. See Fig. 2.
- Turn down adjusting screw (clockwise) until proper clearance is obtained.NOTE: Tensile strength of jet valve spring is weak. DO NOT force screw to turn, putting excess pressure on spring.
- Hold adjusting screw and tighten lock nut. Recheck clearance. Adjust intake valve clearance to 0.006" (.15 mm). Repeat adjustment at each cylinder.