2010 F-150 4.6l STX
Coolant seems to be dripping pretty steady out of this black plastic housing under the engine. You can see its behind and underneath a pulley. Can anyone identify this part? I hope the picture works, ive never uploaded one before. It seems like it has quite a few bolts and looks accessible from underneath the truck. It only leaks when the truck is running, I'm assuming this is due to internal pressure. it looks like some kind of resivour. Thanks for taking a look.

 

i see pic but not exactly sure what/where i’m looking at. but, the most likely source of leak is the intake manifold (next likely coolant pipe under intake), then coolant runs in valley of engine (under intake), eventually dripping out under engine.

 

The area is underneath and to the side of where the lower radiator hose attaches to engine. Next to oil filter.The radiator hose looks fine(I wish it was just a hose..) I did have a leak a couple years ago on the upper intake manifold. It was a bad gasket(apparently pretty common). I replaced the whole upper intake and gasket. The valley is dry. It looks like the coolant comes out of the seam that those bolts hold together. This is as low as you can go directly under engine, you can partially see the lowest pulley in the picture Only leaks when engine is on.
Thanks

 

did you replace your water pump when you did intake?

 

If it's leaking out of the part that has the bottom radiator hose attached to it it's probably the oil filter adapter gasket. But as stated above make sure it's not the water pump leaking and running down the block.

 

I did not replace the water pump, also, it looks like the fluid is coming out of the seam that those bolts are clamping together, but will take a closer look. it's really tight in there. Would there be fluid in the oil filter adapter? To cool the oil? Are these parts commonly replaced after high mileage? Im a little over 200K. Can't afford an auto shop visit. Thanks in advance.

 

Why not just clean the area and slide under yourself to investigate. You can do a better job identifying the leak source than us by guessing.

 

how old are your: water pump, belts/tensioner/pulleys and coolant ?

 

2010, I have never replaced water pump, tensioner or pulleys, I can only assume they are origional, I did replace the belt about a year ago. I'll try to take a better picture of what I think is leaking with the truck running. Sorry, I know its hard to ID the area from that photo.

 

Tracked the leak upwards, ive included a couple pictures. Is this the water pump behind this pulley? I'm not sure, figured I'd let you guys take a look. If so, I'm pretty sure the leak originates there. How much of a pain is replacing the water pump? Is it a part that tends to need replacing? Thanks for taking a look.


Sorry they are so big, I don't know how to make them smaller before attaching.