2004 Kia Rio knocking sound when engine gets hot
2 Answers
What happens as the oil get hot in the engine it can lose its lubricity and any part that is marginal may start to act up. Not a fix, just a patch, change you oil and use a slightly thicker oil, and add some Lucas oil additive. Good Luck
As the oil heats up, it gets thinner- wouldn't surprise me if you have worn engine bearings- but I would have to hear the "knocking sound" to tell you for sure- but it "sounds" like it's time for a new car- and something other than a Kia, please-