Cylinder Head
- Inspect cylinder head warpage at cylinder block and manifold surfaces. Replace cylinder head if warpage exceeds specification. See CYLINDER HEAD under ENGINE SPECIFICATIONS.
- Install camshaft in cylinder head. See Figure. Using Plastigage, check camshaft oil clearance with camshaft bearing caps installed, and bolts tightened to specification in sequence. See TORQUE SPECIFICATIONS .
- Replace camshaft and/or cylinder head if oil clearance is not within specification. See CAMSHAFT under ENGINE SPECIFICATIONS.
- Check camshaft end play with camshaft bearing cap bolts tightened to specification in sequence. See TORQUE SPECIFICATIONS . See Figure. Replace camshaft and/or cylinder head if camshaft end play is not within specification. See CAMSHAFT under ENGINE SPECIFICATIONS.
- Install both camshafts in cylinder head without sub-gear installed on intake camshaft. See Figure. Install and tighten camshaft bearing cap bolts to specification in sequence. See TORQUE SPECIFICATIONS .
- Using dial indicator, check gear backlash between gears on camshafts. Replace camshafts if gear backlash exceeds specification. See CAMSHAFT under ENGINE SPECIFICATIONS.
- Ensure valve lifter bore diameter is within specification. See VALVE LIFTERS under ENGINE SPECIFICATIONS.
- If installing spark plug tubes in NEW cylinder head, apply Three Bond Sealant (08833-00070) on spark plug tube surface of cylinder head.
- Using press, install spark plug tube in cylinder head until spark plug tube protrusion is within specification. See SPARK PLUG TUBE PROTRUSION SPECIFICATIONS table. See Fig 1.
SPARK PLUG TUBE PROTRUSION SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| Tercel | 1.870-1.909 (47.50-48.50) |