My 85 I6 just starting making a gurgling sound about 2 days ago. went out today and started it up and was getting worse. So i started to check things out and with the engine running and oil cap off looking down in the head with a light fresh green coolant is everywhere

the kicker is the engine is not blowing white smoke out the tail pipe, and is running as it always has run before. The intake and exhaust gasket is all chewed up and was hacked in by somebody before me. Does coolant run through the intake manifold. I dont know whether its a cracked head, head gasket, intake gasket. what do you guys think?

 

i'd just replace them all

safety first!

 

I would say head gasket. you would know if the head was split.

 

So, you have antifreeze underneath your valve cover, is that right? Is there oil
in your radiator/coolant?

Gurgling sound???

You could take your valve cover off and pressurize the cooling system and take
a look....

EDIT: Drain your oil, see how much coolant is in it.
I wouldn't run the engine in this condition....

 

does anybody know if coolant is run through the intake manifold

 

It does on the 4.6., 5.4 and 6.8
i do not know about your truck.

 

I can't imagine so on an I300 but I know virtually nuttin' about that engine fer shure....

 

wait for stosh, he will know better