Measure and Adjust Valve Lash Clearance (S.N. 830205- )
IMPORTANT: Valve clearance MUST BE checked and adjusted with engine COLD. 1. Remove rocker arm cover and crankcase ventilator tube.IMPORTANT: Visually inspect contact surfaces of valve tips and rocker arm wear pads. Check all parts for excessive wear, breakage, or cracks. Replace parts that slow visible damage. Rocker arms that exhibit excessive valve clearance should be inspected more thoroughly to identify damaged parts. 2. Remove plastic plug or cover plate from engine timing hole (A). 3. Remove plug from timing hole (B). |
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CAUTION:
To prevent accidental starting of engine while performing valve adjustments, always disconnect NEGATIVE (-) battery terminal.
TX,85,BG731 -19-15FEB97-1/3 |
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4.
Using engine rotation tool, rotate engine flywheel in running direction (clockwise viewed from front) until No. 1 cylinder is at "TDC" Compression stroke.
5. Check and adjust valve clearance to specifications, as directed in the following procedures. 6. If rocker arm is equipped with adjusting screw and jam nut (A), tighten jam nut to 27 N·m (20 lb-ft) after adjusting valve clearance. Specification
NOTE: Firing order is 1-5-3-6-2-4. 7. Lock No. 1 piston at TDC compression stroke (B). Adjust valve clearance on No. 1, 3 and 5 exhaust valves and No. 1, 2, and 4 intake valves. Turn crankshaft 360°. Lock No. 6 piston is at TDC compression stroke (C). Adjust valve clearance on No. 2, 4 and 6 exhaust valve and No. 3, 5, and 6 intake valves. |
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TX,85,BG731 -19-15FEB97-2/3 |
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Install rocker arm cover. Tighten dry cap screws to 35 N·m (26 lb-ft). DO NOT over-tighten cap screws. Specification
8. Remove timing pin and turning tool. Install plugs. 9. Connect vent tube.
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TX,85,BG731 -19-15FEB97-3/3 |