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.
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HOMESERVICE MANUALSISUZU2004ASCENDER 2WD L6-4.2LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYVALVE, INTAKE/EXHAUST
2004 Isuzu Ascender 2WD L6-4.2L
Valve, Intake/Exhaust
2004 Isuzu Ascender 2WD L6-4.2LSECTION Valve, Intake/Exhaust
Engine Mechanical Specifications
Valve System
Valves - Valve Face Runout 0.038 mm (0.0015 inch)
Valves - Valve Seat Runout 0.05 mm (0.002 inch)
Valves - Valve Stem-to-Guide Clearance - Exhaust; 0.0375-0 0775 (0 0015 0 0030 inch)
Valves - Valve Stem-to-Guide Clearance - Intake; 0.030-0.065 mm (0.0011-0.0025 inch)
Valve Springs - Valve Spring Load - Closed; 211.4-233 4 N @ 35 mm (47.5-52.5 lb @ 1.701 inch)
Valve Springs - Valve Spring Load - Open; 579-631 N @ 24..5 mm (130-142 lb @ 1.260 inch)
Valve System
Valves - Valve Face Runout 0.038 mm (0.0015 inch)
Valves - Valve Seat Runout 0.05 mm (0.002 inch)
Valves - Valve Stem-to-Guide Clearance - Exhaust; 0.0375-0 0775 (0 0015 0 0030 inch)
Valves - Valve Stem-to-Guide Clearance - Intake; 0.030-0.065 mm (0.0011-0.0025 inch)
Valve Springs - Valve Spring Load - Closed; 211.4-233 4 N @ 35 mm (47.5-52.5 lb @ 1.701 inch)
Valve Springs - Valve Spring Load - Open; 579-631 N @ 24..5 mm (130-142 lb @ 1.260 inch)
RENDER: 1.0x
NO RELATED
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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.