| General Procedures Special Tool(s) | | Compressor, valve bucket tappet 303-563 (21218) | | | Remover/installer, valve adjusting shim 303-563-01 (2121801) | | | Pliers, spark plug connector 303-622 (21226) | General Equipment Materials Name Specification Silicone grease A960-M1C171-AA Adjust All vehicles | | -
Remove the valve cover.
For additional information, refer to: Valve Cover (303-01A Engine - 1.4L/1.6L, In-vehicle Repair).
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NOTE:Note down each cylinder number and the valve clearances measured. Using a suitable set of feeler gauges, measure the valve clearances. | | | -
NOTE:Only rotate the crankshaft in the normal direction of rotation. Rotate the crankshaft until each piston is at TDC and measure the valve clearances. | Vehicles built up to 01/2001 | | -
NOTE:Only carry out the following steps when the valve clearance(s) require adjustment.
For additional information, refer to: Specifications (303-01A Engine - 1.4L/1.6L, Specifications).
NOTE:Install the long bolts at the front. Attach the special tool. - Remove the outer bolts from the first and last camshaft bearing cap.
- Attach the special tool with the depressor guide facing outwards.
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NOTE:The cam of the valve concerned must face upwards. Attach the special tool. - Insert the depressor into the lever.
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NOTE:The tappet groove must face the center of the engine. NOTE:Do not press the adjusting shim with the depressor. Remove the adjusting shim. - Attach the depressor to the edge of the valve tappet and press down the tappet.
- Remove the adjusting shim.
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Determine the thickness of the adjusting shim using a micrometer. | | | -
Choose a new adjusting shim. - Determine the thickness of the new adjusting shim: Thickness of adjusting shim (new) = valve clearance (measured) + thickness of adjusting shim (old) - thickness of adjusting shim (new). The thickness of the chosen adjustment shim must not be more than 0,03 mm different from the calculated value.
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Insert the new valve adjusting shim according to the previous step. | | | -
Check the valve clearance; if necessary, adjust the valve clearance according to the previous steps. | | | -
Carry out the steps for each cylinder on the inlet and exhaust sides respectively. | Vehicles built 01/2001 onwards | | -
NOTE:Only carry out the following steps when the valve clearance(s) require adjustment.
For additional information, refer to: Specifications (303-01A Engine - 1.4L/1.6L, Specifications).
Remove the camshafts.
For additional information, refer to: Camshafts (303-01A Engine - 1.4L/1.6L, In-vehicle Repair).
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NOTE:The number on the valve tappet is the tappet thickness, however only the decimal digits are marked (for example 725 = 2.725). Determine the valve tappet thickness required: - Remove the valve tappet and read the thickness from the underside.
- Calculate the valve tappet thickness required:
- Thickness of currently installed valve tappet, + the measured valve clearance, - the required valve clearance.
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Install the correct valve tappet. | | | -
NOTE:Do not install the timing belt before the valve clearances are correct. Install the camshafts.
For additional information, refer to: Camshafts (303-01A Engine - 1.4L/1.6L, In-vehicle Repair).
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NOTE:Rotate the camshafts to measure the valve clearances. Measure the valve clearances and repeat the procedure as necessary until all valve clearances are within the specified tolerance. | All vehicles | | -
Install the valve cover.
For additional information, refer to: Valve Cover (303-01A Engine - 1.4L/1.6L, In-vehicle Repair).
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