Okay so about a month ago I replaced the whole intake manifold and gasket and now I'm getting a leak that I cannot find its dripping from the passenger side and leaks when the truck is off anyone else have this same problem ? Or any ideas of what it is maybe the heater core lines ? If someone can post some pics too would help a lot!

 

If you have a heated PCV system, then there will be additional coolant lines near the pass side going from the barb on the hard line to around the pcv valve. I'd check those if you have them.

Try to see if you have any coolant inside the valley of the motor (under the intake manifold) often the line to the water pump can go bad too. Hopefully you replaced it already during the manifold replacement and also did a new knock sensor!

 

I'll have to check the pcv system of I have it I can post some pics and There's no coolent in the valley at all

 

Okay idk if this will help but I did check the valley and there is some coolent in the valley how would I check the lines to see if they are bad ?

 

But there is very little

 

So it appears you do not have the heated PCV system. If your trying to check the line to the water pump in the valley, you really wont be able to see without taking off the intake manifold...again. This should have def been serviced when you did the manifold

Sorry to break the bad news. It could be something else too.

 

So I'm going to make a educated guess and say it's that line since there's coolent in my valley ? Lol well that's a pain in the ***

 

I would check the heater hoses going into your heater core. These have a quick connect fitting on them made of plastic. The plastic gets brittle when old and when working on the truck and bumping these hoses, the fittings will crack and not hold the heater hose tightly. As a result, you start getting a small leak. the combination of these fittings and an o ring are the only things keeping in the coolant.

 

I'm having a similar problem that I'm trying to diagnose. I'm having a hard time figuring out where my coolant is coming from. I noticed some coolant in the valley of the motor and it drips down on the passenger side down over the starter. Your pictures look similar to what I'm seeing. What I can't figure is why it leaks while the motor is not running? I would be curious to know what you found and what it took to fix it? Thanks in advance.