Contaminated coolant
| Cause | Correction | |
| Rusty coolant, operation without correct mixture of antifreeze and water |
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Drain and flush the cooling system. Fill with correct mixture of antifreeze and water. |
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Review the coolant change interval. |
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| If equipped, leaking transmission oil cooler |
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Check/replace oil cooler. |
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| Oil leaks from oil cooler, head gasket, head and cylinder block. |
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Refer to Troubleshooting Logic for lube oil loss. |