It's weird this only happens when my car has been sitting out in the sun for at least an hour or so. Other than that everything's fine. When I start up the engine it sounds normal for about 3 seconds and then it will make a loud clicking sound that sounds like a diesel engine for about 2 seconds. Then the engine will jerk for a split second. Is this all just because it's hot outside? Like the oil thinning out maybe? It's around 90-100 degrees everyday where I live.