Exactly what I wanted to hear as my only recourse would be to install new heads thank you thank you very much Crystal.

One more question please? I did not replace the pipe under the intake from the water pump to the hose heater inlet. Under the intake it looks good but where it comes out at the back of the engine where the hose is attached the metal on that pipe is flaking off.
How do you replace that pipe?

Will removing the water pump show that pipe connection? Mine is a NPI becasue I see no gap from the end of that pipe where it enters the water pump. I read the BOK and it was confusing. I understand how the nipple is installed but how is the pipe in the valley connected to the nipple?

Thanks again.

Edited by Site66 (12/20/20 05:50 PM)
2004 Mercury Grand Marquis Ultimate Pearl White
Bought in 2017 w 55,000 miles on it. New Ford racing intake mani and it runs really strong. Duals coming and new gears in the back. Looking for J Mod.