98’ V6 4.0 OHV. My coolant is leaking on the back low side of engine. I don’t understand or have seen the line diagram of the radiator or how the coolant reaches this spot of the engine. I’m a noobie but I’ve seen a ton of videos. When I turn the engine on, it will spit it out of the leaking point, and then it will just start seeping from there. When I simply pour coolant into the radiator , it will eventually have enough in there will it will have a nice flow out of it with engine off. Is it a simple gasket fix? I checked dipstick it’s clean, not polluted with any other liquid. I used UV dye, and only this spot has coolant, everywhere else on truck is clean. Surface was level when doing my check. Thank you!

As I pour coolant in radiator, it will eventually have a steady flow coming out. Engine off.

Area where it’s leaking but under

It leaks in this area but below.

With engine on, it will seep out of here.

Initial engine startup, she’ll squirt some out.

 

A heater hose would be the cheapest leak source.
In the photos, I can't tell what might be flowing coolant or flowing (run-off) coolant.
I assume we're looking from the driver's fender towards the center of the rear of the engine.
What is the detail of the lower-right quarter of photos 1, 4 and 5 (thing with the black brace bolted to it)?

There's no coolant entering the cabin, right?

 

If you look at the last photo, you can see it squirting out between the head and intake manifold,

My guess is you need new intake manifold gaskets

 

no coolant in cabin, just simply there. I stuck my phone camera in the passenger fender to get the image. I will have to check what the black brace does.

 

I have a various people suggesting the same thing. I bought new gaskets and a couple miscellaneous things I’m changing out this weekend. I’ll give everyone an update if the gasket fixed the problem. Thank you.

 

lower intake manifold gasket