| Gray green substance under oil cap - Cummins ISX15 |
| 03-05-2021, (Subject: Gray green substance under oil cap - Cummins ISX15 ) Post: #19 | |||
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| RE: Gray green substance under oil cap - Cummins ISX15 Why don't you send an oil sample to the lab to see if your oil is getting contaminated with coolant. Speedco's machine would probably even be ok for your situation. Then atleast you'll have a direction to go in. | |||
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