Valve Springs/Seals: Installation
NOTE:
Before replacing parts, inspect all related valvetrain components for damage to prevent engine misfire.
NOTE:
Black valve seals are intake. Brown valve seals are exhaust. See Figure.
- Install valve seals. See Figure.
- Coat the valve stems with clean engine oil and insert them in the cylinder head.
- Install valve spring seats. See Figure.
- Install valve springs and valve retainers. See Figure.
- Compress valve springs with a valve spring compressor. Install retaining locks and release tool.
- If valves and/or seats have been reground, measure valve tip height (A). See Fig 1 . Make sure measurements are taken from cylinder head surface to the top of valve stem. If valve tip height is greater than 52.96 mm (2.085 in.), grind the valve tip until within specifications.
- If valves and/or seats have been reground, measure installed height of springs (B). See Fig 1 . Make sure measurements are taken from top of spring seat to the bottom surface of valve spring retainer. If height is greater than 44.45 mm (1.75 in.), install a 0.794 mm (1/32 in.) spacer in head counter-bore under the valve spring seat to bring spring height back to 43.69-44.45 mm (1.72-1.75 in.).
| 1 - VALVE SEAL |
| 2 - VALVE SPRING SEAT |
| 3 - CYLINDER HEAD SURFACE |