1. What is Valve Spring Height?

Valve spring height (H) is the total height of a valve spring when installed, calculated as the sum of the solid height (fully compressed height) and the valve lift. This measurement is critical for proper valve train operation in internal combustion engines.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( H \) — Installed spring height (mm)
• Solid Height — Fully compressed spring height (mm)
• Lift — Maximum valve lift (mm)

Explanation: The installed spring height must account for both the spring's compressed state and the additional space needed for valve movement.

3. Importance of Correct Spring Height

Details: Proper spring height ensures correct spring pressure, prevents coil bind, and maintains proper valve timing. Incorrect height can lead to engine damage or poor performance.

4. Using the Calculator

Tips: Enter solid height and lift in millimeters. Both values must be positive numbers. The calculator will sum them to give the total installed spring height.

5. Frequently Asked Questions (FAQ)

Q1: What happens if spring height is too small?
A: Too little height can cause coil bind (springs fully compressing), leading to valve train damage and potential engine failure.

Q2: How does spring height affect spring pressure?
A: Spring pressure increases as height decreases. Proper height ensures correct pressure throughout the valve lift range.

Q3: Should shims be used to adjust spring height?
A: Yes, spring shims can fine-tune installed height, but must be used within manufacturer specifications.

Q4: How often should spring height be checked?
A: During engine assembly and whenever valve train components are serviced or replaced.

Q5: Does this calculation apply to all spring types?
A: This basic calculation works for most conventional valve springs, but dual or progressive springs may require additional considerations.