My son purchased a very used 2000 Chevy Silverado 1500 v6 for his first truck. I suggested that he knock out a quick oil change and proceeded to explain what he needed to do. We work on other projects together so I wasn’t really worried about it. He finished the oil change, cleaned up his mess and drove off.
He came back at the end of the day and complained that his truck was running funny, so I went out and checked the oil. Way too much. I instructed him that he needed to drain some out and make sure it was good to go before he took off. He gets done in about 30 min and takes off again. This time he returns and states that the truck is running really bad (white smoke), and he cannot shift into reverse.
I have him show me what he did exactly and he proceeded to show me that he had drained his transmission fluid (bone dry), and over serviced the engine oil by an estimated 8 quarts!! I couldn’t get even the slightest bit upset because I knew better than to let him work on it without showing me what he was doing. He was totally into “I can do it by myself Dad” mode, and didn’t want to start stirring his Cool Aid on his first job on his new truck.
So now my plan is to drain the oil, replace the oil filter, drop the transmission pan, replace the filter and seal, then refill the fluids and go from there.
My questions are; Just how bad could the damage be? and What do I need to be on the lookout for as far as future problems arising from this mistake?