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Engine Compression

Ensure battery is fully charged. Warm engine to normal operating temperature. Disconnect wire at ignition coil to prevent engine from starting. Check engine compression with all spark plugs removed and throttle wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Normal Compression Pressure
Caravan, Town & Country, & Voyager (1)
Dakota
2.5L 120-150 psi (827.4-1034.3 kPa)
3.9L, 4.7L & 5.9L (1)
Durango (1)
Ram Pickup, Ram Van & Ram Wagon (1)
Minimum Compression Pressure
Caravan, Town & Country, & Voyager 100 psi (689.5 kPa)
Dakota
2.5L & 4.7L (1)
3.9L & 5.9L 100 psi (689.5 kPa)
Durango
4.7L (1)
5.9L 100 psi (689.5 kPa)
Ram Pickup
5.9L (Gasoline) 100 psi (689.5 kPa)
3.7L, 4.7L, 5.9L Diesel & 8.0L (1)
Ram Van & Ram Wagon 100 psi (689.5 kPa
Maximum Variation Between Cylinders
Caravan, Town & Country, & Voyager 25 Percent
Dakota
2.5L 30 psi (206.9 kPa)
3.9L, 4.7L & 5.9L (1)
Durango (1)
Ram Pickup, Ram Van & Ram Wagon (1)
(1) Information is not available from manufacturer.