 Jim Grant's Tech Tips ‘GM Diesel, Anti-freeze In The Oil
Q:
Will anti-freeze (Green type) in the oil hurt the engine if it is driven about 350 miles after detection. The engine never cooled down and the oil was flushed twice after arriving at the destination. It is a GM truck with a 6.5 liter diesel.
- Bernie Harris A:
Will anti-freeze (Green type) in the oil hurt the engine? Anti-freeze of any kind can cause damage to an engine. The problem with anti-freeze in the engine oil is that you cannot tell from the outside what damage may or may not have occurred. You did the right thing by flushing that anti-freeze out of the system. I hope that you had the cause for anti-freeze entering the engine oil corrected as well. At this point you have 2 approaches to your question. 1; You can have the engine disassembled and inspected. 2; You can test your luck and run the engine to see what happens.
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