My name is ray i have a 1993 infiniti g20 it has 76,550 miles on it just replace starter has new altenator oil changed regulary no check engine lights on its a great car.but for some reason when the engine gets hot and i have driving all day it starts to click and the when i accelerate the clicking gets faster and the exaust sounds like a truck diesal and when it cools off the clicking is gone.car is not running hot no funny smells fan blade is fine please help i love this car