I took my truck out yesterday, a pretty hot day, to put my boat in. I drove the truck without trailer for about 30 min, got the boat and drove a couple blocks to the ramp. I pulled it back out, drove the couple blocks back and hung out for a few hours. I then went about 30 min home without trailer. I was backing in my driveway and noticed a trail of small spots on the ground. My driveway is slopped, I stopped at my gate to unlock it and behind the gate the driveway becomes flat again. I didnt notice and spots on the slopped part, just the flat part but it can be hard to see spots on the slopped part since its the rocky concrete. Under where I park my truck, I noticed a rather large spot. I looked under the truck but couldnt tell where it was coming from since there were little drip spots all over. Today I wiped the spots off and turned the truck. I didnt notice any drips at all. I then took it for a ride so it could get to normal temp. I mostly drove around the neighborhood (25mph) but also hit main streets (40 mph). I brought it back and nothing. I took my flashlight and looked at all hoses and fittings and there wasnt a single drop anywhere. It is possible that it leaked yesterday because it was so hot? Is there some kind of stop leak I should use just in case? Do I just need to keep an eye on it? Thank yall in advance for your help.

 

Are you sure it was antifreeze and not just water from the AC?

Photos would help us visualize what you’re dealing with.

 

Yep. I wasnt running ac and it was green. I didnt take any photos yesterday since I figured it would happen again today but that didnt seem to be the case. Yesterday there were a few drops where the plastic guard meets the fan and the rest were around and on the hoses at the very bottom of the truck. I didnt get a chance to look from the top down much yesterday since every part of the truck was extremely hot to the touch (from the weather) so I couldnt climb up on it.

 

Very common for the weep hole in water pump to drop and few drops every now and then before the pump totally fails.

 

What Whitey said.... or what I am dealing with now is my thermostat housing is seeping from the edge and it dries up before dripping. Every now and then i see a few drops. And about every 6 months I have to add a little coolant to the reservoir. Look for a little green/white crust near hoses and fittings. That would be coolant leaking and drying up.

 

DO NOT USE STOP LEAK!!! Good chance of plugging up radiator passages and the heater core, then you will have to replace them as well.
What I would recommend is to get a hose and rinse everything off with the engine still hot from driving. Come back the next day and look for any sign of coolant and take it from there.
Places to check for leaks would be the heater core connections. Water pump weep hole. Radiator core end caps at the bottom of the radiator. If one of the spring clamps for any one of the radiator hose has rusted and broken in half, (yes it happens) but the two halves have remained in place, there will be no clamping force on that particular junctions and the leak will be there.

 

A shop replaced the water pump, antifreeze reservoir, water outlet, thermostat, engine cooling system temperature sensor, and engine cooling system temperature sensor connector on 4/6/22 so I hope that wouldn't be my issue. I guess my best bet would be to keep on running it until I see the leak again. I will keep an eye out for the white crest and specifically check the areas yall have mentioned. I greatly appreciate your alls responses and help. If yall can think of anything else I should look at please let me know and I'll post any updates I come across. Thank yall again.

 

It is common on these trucks for the coolant level to settle about an inch below the cold fill line on the coolant reservoir. Mine does that. Not a problem.

A leak to the ground is different, please post pics of it.

Also is the truck AT or MT?

 

Its AT. I didnt take pictures when it first happened but if it does it again, I will take pics and upload them.

 

After reading thru this again, these are the conditions that will make the transmission leak. In reverse with a load or on a grade or both the front transmission seal will quickly overheat and leak transmission fluid. It will seal again correctly after it cools off. The replacement seals correct this, made of viton or something. Not worth "fixing" imo, just try to avoid those conditions and be aware that excessive leakage may require topping off the transmission fluid.

 

i had a leak through the hose cords internally on the top hose and escape down the backside of it on the rear of my TSTAT housing dripping everywhere after changing my WP.

some leaks are fun to find

 

The fluid appeared green like antifreeze but I will take a look at my transmission fluid to see if its low.

 

That sounds like a nightmare to trace.

 

The only leak my truck ever developed was the o-rings lost their seal at the heater core connection inside the coupler where the heater hoses connect to the core.

 

i let it weep and finally it leaked bad enough to find