Heater hose DIA

[Cobra514]

Does anybody know the ID of the heater core hoses on a Gen 4 (2014) 5.7L?

I want to flush my heater core and need to purchase some barbed fittings. (I'm disconnecting at the 3-way valve and water pump since those ends are way easier to get to.

I tried some Dorman 5/8" barbed fittings (which perfectly fit the 5/8" ID hose I purchased to run to a small pump for flushing), but they were way too small for the heater hoses.
The 5/8" caps I purchased to stick on the valve nipple were too small as well. So no way those hoses are 5/8" ID.

Could they be 3/4" ID?

 

[Wild one]

Does anybody know the ID of the heater core hoses on a Gen 4 (2014) 5.7L?

I want to flush my heater core and need to purchase some barbed fittings. (I'm disconnecting at the 3-way valve and water pump since those ends are way easier to get to.

I tried some Dorman 5/8" barbed fittings (which perfectly fit the 5/8" ID hose I purchased to run to a small pump for flushing), but they were way too small for the heater hoses.
The 5/8" caps I purchased to stick on the valve nipple were too small as well. So no way those hoses are 5/8" ID.

Could they be 3/4" ID?

Well if 5/8's pieces didn't fit,process of elimination should tell you 3/4" is probably the size you need

 

[Dodge 1500 4X4]

Hose is measured in ID; Tubing is measured in OD.

 

[Cobra514]

Well that's what I assume. When I looked up the hose replacement part, the specs said both ends were 5/8" ID. So.... of course I purchased 5/8" parts, lol. I'm done researching anything on this vehicle trying to be prepared. Documtation is horrible.

 

[GTyankee]

I would go to a place that sells automotive hose.
Then plead with the clerk to cut off 3" lengths of different diameter hose, they may even have some cut offs.
When you find the right size, buy your hose there, maybe slip them a tip