Intermittent Cooling leaks on 4.7 - Pressure test

[B.E. Coyote]

I have an occasional coolant leak on my 04 4.7 I lose almost a 1/2 gallon per 1000 miles. The engine has never overheated.

It looks to be coming from behind the engine. I have found other threads that suggest the water pump or an o-ring on the tube above. They leak sending coolant to the back of the engine from on top of the engine.

I have seen it dripping from behind once or twice. It will drop a pint of coolant on the ground fairly quickly but now that I have pulled my skid plates I can not recreate it to confirm.

Would a pressure test show me the leak? I'm not sure how it would be different than just running the vehicle to operating temperature?

 

[AuSeeker]

I have an occasional coolant leak on my 04 4.7 I lose almost a 1/2 gallon per 1000 miles. The engine has never overheated.

It looks to be coming from behind the engine. I have found other threads that suggest the water pump or an o-ring on the tube above. They leak sending coolant to the back of the engine from on top of the engine.

I have seen it dripping from behind once or twice. It will drop a pint of coolant on the ground fairly quickly but now that I have pulled my skid plates I can not recreate it to confirm.

Would a pressure test show me the leak? I'm not sure how it would be different than just running the vehicle to operating temperature?

I have heard that the coolant will glow under a UV light, not sure if that's true but worth trying to help locate the leak.

If you're able to try a UV light let us know if the coolant does indeed glow.

 

[Buckaroo]

I have heard that the coolant will glow under a UV light, not sure if that's true but worth trying to help locate the leak.

If you're able to try a UV light let us know if the coolant does indeed glow.

It will glow....but you need to add the glow juice. This is the kit I have.

Amazon.com: MASTERCOOL 53351-B Professional UV Leak Detector Kit with 50W Mini Light, Black: Automotive

Buckaroo

 

[B.E. Coyote]

kit ordered