Added coolant to car today. Poured out the back of the engine some where, saw it coming off bottom of transmission. Guess gotta pull intake now.

 

It very well could be the intake, they're known to fail. I think mine has the slightest hairline crack in it, need to replace it.

 

This car has been a pain so far. Frustrating.

 

Dunno what year it is, but it's 10 years old or more now, things will start going wrong. Fortunately, there's enough Mustangs and enough places that make parts for them that repairs won't be ridiculous cost wise.

 

Three possibilities:
Passenger side back of the engine, heater hoses.
Both sides, back of the engine, intake manifold gasket.
Another possibility could be the passage in the valley of the engine.

 

Heater hoses are good. Pretty sure its the intake. Car runs like crap also. Previous owner did a number on this one.

 

Well looks like I found the problem. NPI intake on a PI long block.

 

Well intake only part of it. Its the passenger side freeze plug. Now have to pull the transmission.

 

Got er done. Runs decent now. Lotta crap for a $1 part.