I need some help figuring this one out, my car was running fine and no significant loss in power also no smoke coming out of the exhaust during normal operation, I noticed a coffee colored sludge in the coolant tank, the car never overheated but the coolant level did drop due to a leaking hose. I never got the coolant light and know that it works when i started flushing the system. I also noticed the spark plugs were normal and a quick peek at the top of the pistons shows a uniform color consistency. I dont have any noticeable discoloration on the oil when I drained it. I did remember going downhill for 3 miles and saw a puff of smoke when I got to the bottom of the hill. Any input?
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