// INPUTS
// OUTPUT
REQUIRED COLD GAP:
— mm
— thou
Why this matters:
At operating temperature, both the cylinder and the ring expand. If the block expands faster than the ring (like aluminum vs. cast iron), the gap closes tighter. If you cut the gap for cold fit, the hot engine will seize.
This calculator solves for the cold gap that yields the correct hot clearance.
At operating temperature, both the cylinder and the ring expand. If the block expands faster than the ring (like aluminum vs. cast iron), the gap closes tighter. If you cut the gap for cold fit, the hot engine will seize.
This calculator solves for the cold gap that yields the correct hot clearance.
Formula: gap = (α_block − α_ring) × ΔT × π × D
Data: machine-readable constants
Data: machine-readable constants