Question that maybe someone can answer or enlighten me on..

I bought this 06 F150 4.2L back in January of this year. It had a bad transmission. Well I finally get around the rebuilding the trans and am now in the process of replacing the exhaust manifolds. Upon removing the passenger side manifold I find what appears to be coagulated yellow/orange antifreeze. The port was damp/wet but not filled up. Its sweet in taste so I'm going to assume it is antifreeze. The rad bottle is almost full of coolant, the plug from that cylinder has zero antifreeze on it and no cylinders have liquid coolant in them nor smell. The port is the front most cylinder (1?) Mileage 158,000.

When I bought the truck it ran perfect except for the ticking exhaust and failed transmission. It has sat since late January.

I'm up against the wall over just putting it together.

Any ideas?

 

My guess is lower intake manifold gasket, they are prone to leakage with time.