STEP Diagnostics - Mechanical test comparison worksheet
Documentation aid; follow current engine and tester instructions.

Vehicle / exact engine:
Complaint / conditions:
Diagnostic question:
Compression procedure and revision:
Equipment / preparation / conditions:
Cylinder identification:
Pressure result / units / applicable criterion:

Leak-down procedure and revision:
Tester / reference checks / setup:
Required cylinder position and movement precautions:
Input conditions and result:
Observed escape location, if established:
Applicable interpretation criteria:

Repeat measurements and changed conditions:
What each result supports:
Disagreement requiring investigation:
Evidence establishing cause:
Unconfirmed repair scope:
Next prescribed test:

No universal pressure or leakage limit is supplied. Pressurized air can rotate the engine; follow positioning and equipment safety procedures and remove crank-turning tools before pressurization.