Coolant leak

[Wicked5seven]

I lost my license for six months and hadn’t really had a chance to drive my truck. I started it about once or twice a week for about four months then the truck sat for two months because I noticed it had a coolant leak. Which was coming from the radiator and I replaced the radiator and truck ran fine no leaks no nothing then recently as I’ve started running it again. I noticed a leak started in the driveway and every time I check for the leak. I can’t find it where it’s coming from. There seems to be a drip coming from behind the water pump housing and then a drip coming from above the AC compressor I put dye in the coolant and still can’t find it. Was wondering if anyone’s had this issue before? It seems like it’s coming from between the cast front plate on the motor and the block.

 

[Wicked5seven]

Here’s where it is you can kind of see

 

[Dodge 1500 4X4]

Probable coming out of the water pump weep hole is it the OEM water pump? check idler pulley bearings at the same time, check serpentine belt for cracks probable time to replace it.

 

[Mojo88]

For coolant leaks, there's really only one tried-and-true method of diagnosis, and that's a pressure test. My method is to blast off the whole area with compressed air, then pump up to ~20psi, and look around with a good light, while the system is under pressure.

I've had the same Stant Pressure Tester for ~40 years (shown in pics below), and it still works perfect. You likely don't have a pressure tester, but perhaps a local auto store has one on a free loaner basis. Often times, you need to use an adapter to get the tester to fit the radiator.

 

[Dodge 1500 4X4]

For coolant leaks, there's really only one tried-and-true method of diagnosis, and that's a pressure test

you also need to make sure the thermostat is open to perform a proper pressure test.

 

[Mojo88]

you also need to make sure the thermostat is open to perform a proper pressure test.

Been pressure testing over 50 years. That never seemed to make any difference for me, but YMMV...............

 

[Wild one]

you also need to make sure the thermostat is open to perform a proper pressure test.

Most thermostats built in the last 30 years have a bleed/weep hole,so you don't have to remove it,or have it open to pressure test the cooling system. Years ago you usually wanted it open,but with the advent of the weep hole,you don't have to worry about that anymore