Celica GTS
NOTE:
Check or adjust valve clearance with engine cold.
- Remove valve cover. Turn engine to TDC of cylinder No. 1, on the compression stroke. Measure and record clearance between cylinders No. 1 and 3 exhaust valves and cylinders No. 1 and 2 intake valves. Turn crankshaft 360 degrees. Measure and record clearance of cylinders No. 2 and 4 exhaust valves and cylinders No. 3 and 4 intake valves.
- Compare measurements with valve clearance specifications. See ALLOWABLE VALVE CLEARANCE SPECIFICATIONS table. If adjustment is required, turn crankshaft until camshaft lobe of valve being adjusted is straight up.
- Position lifter notch toward spark plug. Using Valve Clearance Adjuster (SST 09248 70011), press lifter down. See Fig 1. Using a small screwdriver, pry up and remove adjusting shim.
- Using a micrometer, measure and record thickness of adjusting shim. Replace it with a shim of correct thickness to return valve clearance to specification. See VALVE CLEARANCE SPECIFICATIONS table.NOTE: Shims are available in 27 different thicknesses, from .079" (2.00 mm) to .130" (3.30 mm), in .002" (.050 mm) increments.
- Install adjusting shim and recheck clearance. Install valve covers.
ALLOWABLE VALVE CLEARANCE SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| Intake | .006-.010 (.15-.25) |
| Exhaust | .008-.012 (.20-.30) |
VALVE CLEARANCE SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| Intake | .008 (.20) |
| Exhaust | .010 (.25) |