I have a 2009 Kia Borrego 4x4 SUV with 8 cylinders. Just this week the engine suddenly stop working. I mechanic friend from church did a diagnostic test and told me cylinder 2 has no compression due to the valve spring not shutting. He recommended i take the car to a Kia dealership to have it fixed since he is not comfortable with the engine and brand. He thinks the cost may run between $1700 to $3000 depending on dealer markup and additional diagnostic tests they may run. What advice can you guys give me. I can’t afford a new car at the moment. If I can fix this and run it for another 2-3 years i will be happy. Also please comment on the cost estimate from my mechanic friend. Thanks.