Knocking sound after car has been already been warmed up. The knocking started and then went away. Engine was already warmed up very distinct metal tapping sound that is why I called it knocking. A little history Toyota replaced the head gasket and cleaned the EGR, change the plugs all at 150,000. The car now has 190,800 Do you think possibly it has a bent connecting rod from the head gasket problem? It is strange though the problems seemed to fix itself I have put 150 miles on it since it did the sound. Do you think it’s time for a leak down test? No coolant loss by the way. When the knocking was going on it did not feel like the vehicle was misfiring. No check engine light and I pulled up codes in system none there.
