I am working on a 1946 1/2 ton model DP. Had complete rebuild done at my local motor shop. I ran it about 8-10 miles before Noticing that the oil level was high and coolant was low. I drained the oil and found I had almost 4 quarts of coolant in the oil. I called my machine shop and I pulled the engine and dropped it off. They ran coolant pressure check overnight with 21lbs. No leaking found.
Can anyone help me understand how this is possible?
If that much coolant found it’s way into the oil system, shouldn’t a coolant pressure test show some leakage?
