Engine Compression

NOTE: Prior to checking compression, be sure battery is fully charged to avoid battery run down. When turning engine over during test, 6 "puffs" per cylinder should be used to obtain reading.

Remove air cleaner and install screen cover over air crossover. Disconnect electrical wire from fuel injection pump solenoid terminal.
Disconnect glow plug wiring and remove all glow plugs. Use compression gauge (J-26999) to test individual cylinders.
CAUTION: Do not add oil to cylinders during compression check as extensive engine damage will result.

COMPRESSION SPECIFICATIONS

Compression Ratio

21.5:1

Compression Pressure

275 psi (19 kg/cm² )

Max. Pressure Variation

⁽¹⁾

⁽¹⁾	Lowest cylinder must read within 70% of highest.