I drained the coolant out of my 93 donor truck from the drain valve on radiator into a 5 gallon bucket and when I pulled the bucket out from under the truck there was a thin film of light brown/whitish oil floating on top of my coolant. What are my possible causes for this?
Im more concerned about the quality of the rebuild, im gonna swap into my 92sd, the truck im looking to buy has a auto trans but my truck has a 5 speed,is that gonna give me any problems when i do the swap.
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