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.
2004 GMC Jimmy (CANADA) V6-4.3LFACTORY OEM SERVICE PROCEDURE
Valve Spring
Valve Springs - Valve Spring Free Length 51.3 mm (2.02 inch)
Valve Springs - Valve Spring Installed Height - Intake 42.92 - 43.43 mm (1.670 - 1.700 inch)
Valve Springs - Valve Spring Installed Height - Exhaust 42.92 - 43.43 mm (1.670 - 1.700 inch)
Valve Springs - Valve Spring Load - Closed 338 - 374 N 43.2 mm (76 - 84 lb 1.70 inch)
Valve Springs - Valve Spring Load - Open 832 - 903 N 32.3 mm (187 - 203 lb 1.27 inch)
Valve Springs - Valve Spring Installed Height - Intake 42.92 - 43.43 mm (1.670 - 1.700 inch)
Valve Springs - Valve Spring Installed Height - Exhaust 42.92 - 43.43 mm (1.670 - 1.700 inch)
Valve Springs - Valve Spring Load - Closed 338 - 374 N 43.2 mm (76 - 84 lb 1.70 inch)
Valve Springs - Valve Spring Load - Open 832 - 903 N 32.3 mm (187 - 203 lb 1.27 inch)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.