Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

1989 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Mechanical Inspection: Compression

Engine mechanical condition can be checked using a compression gauge, vacuum gauge, or an oscilloscope capable of performing a relative compression test. See oscilloscope instruction manual for availability and description of relative compression feature. For procedures and specifications, see D - EFI ADJUSTMENTS article in this section.

CAUTION: Use remote starter to crank engine during compression test, NOT ignition switch. Fuel injectors are triggered during the cranking mode. This could cause fire hazard, flooding, crankcase contamination, hydrostatic lock-up, or lubrication to be washed off of cylinder walls.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.