Mechanical Inspection: Compression
WARNING:
DO NOT use ignition switch during compression tests on fuel injected vehicles. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate engine oiling system.
NOTE:
Before checking engine compression pressure ensure engine oil level is correct. Ensure starter motor and battery are operating properly.
Check engine mechanical condition using a compression gauge, vacuum gauge or engine analyzer. See engine analyzer manual for specific instructions. Start engine and allow it to operate until coolant temperature is 176-205°F (80-96°C). Check engine compression with engine at specified cranking speed, all spark plugs removed and throttle wide open. For engine compression specifications, see COMPRESSION SPECIFICATIONS table.
COMPRESSION SPECIFICATIONS
| Application | (1) Specification | ||||
|---|---|---|---|---|---|
| Compression Pressure | |||||
| Accent | |||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||
| Elantra | |||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||
| Santa Fe | |||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||
| Sonata | |||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||
| Tiburon (2.0L) | |||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||
| Tiburon (2.7L) | |||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||
| XG350 | |||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||
| Maximum Variation Between Cylinders | |||||
| All Models | 14 psi (1.0 kg/cm2 ) | ||||
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