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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 210 (STARTING SYSTEM)COMPONENT TESTSSTARTER INNER COMPONENTS INSPECTIONARMATURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Starter Inner Components Inspection: Armature
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Armature
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that there is no continuity between the commutator and the core at each segment using an ohmmeter. If there is continuity, replace the armature. See Fig 1.
- Verify that there is no continuity between the commutator and the shaft using an ohmmeter. If there is continuity, replace the armature. See Fig 2.
- Place the armature on V-blocks, and measure the runout using a dial indicator. If not within the specification of, runout 0.002" (0.05 mm) maximum, repair using a lathe or replace the armature. See Fig 3.
- Measure the commutator diameter. If not within the minimum specification, standard commutator diameter 1.16" (29.4 mm), minimum commutator diameter 1.13" (28.8 mm), replace the armature. See Fig 4.
- Measure the segment groove depth of commutator. If not within the minimum specification, undercut the grooves to the standard depth. Standard depth is 0.016-0.023" (0.4-0.6 mm), minimum depth 0.008" (0.2 mm). See Fig 5.
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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.