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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA20074 RUNNER 2WD V6-4.0L (1GR-FE)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
2007 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)
Piston Ring, Engine
2007 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)SECTION Piston Ring, Engine
Piston Ring
Piston ring groove clearance
No. 1 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No. 2 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil 0.07 to 0.15 mm (0.0028 to 0.0060 in.)
Piston ring end gap
Standard
No. 1 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
No. 2 0.40 to 0.50 mm (0.0157 to 0.0197 in.)
Oil (Side rail) 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Maximum
No. 1 1.0 mm (0.039 in.)
No. 2 1.1 mm (0.043 in.)
Oil (Side rail) 1.0 mm (0.039 in.)
Piston ring groove clearance
No. 1 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No. 2 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil 0.07 to 0.15 mm (0.0028 to 0.0060 in.)
Piston ring end gap
Standard
No. 1 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
No. 2 0.40 to 0.50 mm (0.0157 to 0.0197 in.)
Oil (Side rail) 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Maximum
No. 1 1.0 mm (0.039 in.)
No. 2 1.1 mm (0.043 in.)
Oil (Side rail) 1.0 mm (0.039 in.)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.