Do you hear a high pitched whine during cranking (before the engine fires) but the engine cranks and fires normally?

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Go to Step 2

Go to Step 4

The distance is too far between the starter pinion and the flywheel.

Has the noise been corrected?

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System OK

Go to Step 3

Adjust, repair, or install new parts as necessary.

Is repair complete?

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System OK

Go to Step 4

1. As the key is being turned, do you hear a high-pitched whine after the engine fires?
2. The engine cranks and fires normally.

Is there a high pitched whine?

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Go to Step 5

Go to Step 7

This is often misdiagnosed as starter hang-in or a weak solenoid.

Is diagnosis correct?

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Go to Step 6

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1. The distance is too small between the starter pinion and the flywheel.
2. Flywheel runout makes this appear to be intermittent.

Has the noise been corrected?

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System OK

Go to Step 3

1. Is there a whine after the engine fires, but while the starter is still held engaged?
2. It may sound like a siren if the engine is revved while the starter is engaged.

Do you hear a whine?

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Go to Step 8

Go to Step 9

Usually this is because of a failed starter motor clutch. Refer to Starter Motor Overhaul .

Has the noise been corrected?

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System OK

Go to Step 3

Do you hear a rumble, a growl, or, in severe cases, a knock as the starter is coasting down to a stop after starting the engine?

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Go to Step 10

System OK

Check for a bent or unbalanced starter armature. Refer to Starter Motor Overhaul .

Is the armature faulty?

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Go to Step 3

System OK