Coolant Leak

[Cheeny23]

I recently swapped the top hose b/c the other one kept leaking a bit, flushed and replaced the coolant at the same time.

Checked all the hoses, every connection, no leaks from them. No leak at thermostat, no leak around water pump, and radiator core is all good too, no cracks. Yet there is still a small leak. I can't tell if it's residual coolant left over from the flush that spilt on shit when i pulled the lower hose or if it's new coolant. The flush was done on the 6th, and I've driven the truck maybe 4 times since.

Anyone have any ideas where it could be leaking from if it is?

 

[Zach.]

did you try washing off the old shit and see if anything new appears?

 

[Cheeny23]

wiped it yea, letting it sit for the time being with towel underneath. wasnt the lines to the throttle body either

 

[Ginger]

water pump. its normally the only thing that will leak on a LS motor.

 

[bgray]

Water pump Gaskets are very common also.

Go to the lcoal loan a tool place anbd get yourself a Coolant pressure tester. Pinch off overflow line, and put 15-18psi on pressure in system. Look for leaks

 

[Jared]

weep hole or gasket

 

[Cheeny23]

I checked the water pump gasket first thing bc I just replaced that on my buddies 6.0. Idk ill keep an eye on it.


going to pull the intake, fan, and belts so i can get a closer look.

 

[PaulJones]

Just replace old shit otherwise it may create hurdles in summer as repaired coolant ducts will not work properly. Temperature hikes above substantial level. Better is to get other durable ducts that bears coolant pressure.

 

[Cheeny23]

Threw a new one on. Was leaking at weep hole

 

[Ginger]

figured thats the only nitorious place for them to leak on the modern engines besides the original head cracks on the aluminum heads