Valve Shim Calculator
Target Clearances
Cylinder 1
Intake Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Intake Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Cylinder 2
Intake Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Intake Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Cylinder 3
Intake Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Intake Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Cylinder 4
Intake Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Intake Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 1
New Shim Needed: —
Enter measurements above
Enter measurements above
Exhaust Valve 2
New Shim Needed: —
Enter measurements above
Enter measurements above
How to Use
- Select cylinders and unit
- Enter target clearances
- For each valve, enter measured clearance and current shim
Formula: New Shim = Current Shim + (Measured – Target)
Common Valve Clearance Specifications
Reference specifications for popular engines. Always verify with your service manual.
Subaru EJ25 (Non-Turbo)
Intake:0.007-0.009″ (0.18-0.22mm)
Exhaust:0.009-0.011″ (0.23-0.27mm)
Subaru EJ25 (Turbo)
Intake:0.006-0.009″ (0.15-0.22mm)
Exhaust:0.010-0.013″ (0.25-0.33mm)
Subaru EJ20 (Turbo)
Intake:0.006-0.009″ (0.15-0.22mm)
Exhaust:0.010-0.013″ (0.25-0.33mm)
Subaru FA20 / FA20DIT
Intake:0.004-0.007″ (0.10-0.18mm)
Exhaust:0.007-0.010″ (0.18-0.25mm)
Subaru FB20 / FB25
Intake:0.006-0.009″ (0.15-0.23mm)
Exhaust:0.010-0.013″ (0.25-0.33mm)
Toyota 2ZZ-GE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.010-0.014″ (0.25-0.35mm)
Toyota 2AZ-FE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.010-0.014″ (0.25-0.35mm)
Toyota 1ZZ-FE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.010-0.014″ (0.25-0.35mm)
Toyota 3S-GTE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.008-0.012″ (0.20-0.30mm)
Toyota 4A-GE (20V)
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.008-0.012″ (0.20-0.30mm)
Toyota 2JZ-GE / 2JZ-GTE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.010-0.014″ (0.25-0.35mm)
Toyota 1JZ-GTE
Intake:0.006-0.010″ (0.15-0.25mm)
Exhaust:0.010-0.014″ (0.25-0.35mm)
Important: These are general specifications. Always consult your factory service manual for the most accurate specifications for your specific engine and year. Clearances should be checked when the engine is cold.