VALVE CLEARANCE ADJUSTMENT
Hydraulic valve lifters automatically adjust stem-to-rocker arm clearance. Repeated valve and/or valve seat refacing will change stem-to-rocker arm clearance. To compensate for excessive changes in stem-to-rocker arm clearance, a longer or shorter push rod must be installed. Push rods are available in .060" (1.52 mm) longer or shorter than original. Use following procedure to adjust valve clearance.
Scheme 48
- Using a remote starter (ignition off), rotate crankshaft until No. 1 piston is at TDC of compression stroke. Reference mark "A" indicates TDC. With No. 1 piston at TDC, mark references "B" and "C", 90 degrees apart. (Scheme 48)
- Using a remote starter (ignition off), rotate crankshaft until No. 1 piston is at TDC of compression stroke. Reference mark "A" indicates TDC. With No.1 piston at TDC, mark references "B" and "C", 90 degrees apart. (Scheme 48)
- Slowly bleed lifter down (until bottomed) using Tappet Bleed Down Wrench (T71P-6513-B) on appropriate cylinder. See «VALVE CLEARANCE ADJUSTMENT»(ref-54496-S36768900202001011700000) table. With lifter plunger bottomed, use a feeler gauge to measure clearance between rocker arm and valve stem tip. See «VALVE LIFTERS»(ref-54496-S02145904602001011700000) table under ENGINE SPECIFICATIONS.
- If clearance is insufficient, install.060" (1.52 mm) undersize push rod. If clearance is excessive, install.060" (1.52 mm) oversize push rod. Check and/or adjust valve clearance on proper cylinders in relation to crankshaft position. See «VALVE CLEARANCE ADJUSTMENT»(ref-54496-S36768900202001011700000) table.
- After making adjustments at position "A", rotate crankshaft clockwise 180 degrees to position "B". Make necessary adjustment in this position by repeating steps 4 and 5. Then rotate crankshaft clockwise 270 degrees to position "C". Repeat Steps 4 and 5.
| Crankshaft Position | Check Intake No. | Check Exhaust No. |
|---|---|---|
| A | 1, 4, 8 | 1, 3, 7 |
| B | 3, 7 | 2, 6 |
| C | 2, 5, 6 | 4, 5, 8 |
VALVE CLEARANCE ADJUSTMENT