Coolant leak

[JLimb]

I own a 2000 F250 with a 7.3. I have a coolant leak that is driving us nuts. Checked all hoses,done a pressure test on the system,and the only leak found was the hose between the radiator and overflow tank which was replaced. Stil leaking. Anyone have any suggestions ? Thanks.

[F350none]

Are you just missing coolant or is there antifreeze on the ground?

[campbellflage]

water pump weep hole was my culprit.

[JLimb]

Antifreeze on the ground under the front of the oil pan. Did you have to change out the water pump ? This is my first diesel so I am learning on the fly. Thanks.

[campbellflage]

Originally Posted by JLimb

Antifreeze on the ground under the front of the oil pan. Did you have to change out the water pump ? This is my first diesel so I am learning on the fly. Thanks.

Yeah. I had unknown coolant loss for a while. I thought it was getting into my oil, but after I replaced the water pump I got a good look at the weep hole and it was all stained up from coolant leaking for a while. I went with dieselsite's water pump, good price and lifetime warrenty.

[JLimb]

I got under the truck today. Nothing leaked out while the truck was shut down. Didn't drive it today. I looked up around the water pump with a light. Hoses all look fine,lower elbow wasn't leaking,the only place I saw coolant was under the water pump down the front side of the oil pan.

[campbellflage]

Time for a new water pump

[bob98247]

Did you pressure test the cap? Doesn't the overflow hose dump in front of the motor?
I've read that the caps commonly hold little, if any, pressure.

[JLimb]

We did a pressure test without any coolant leaking. The last couple of nights there has been a small amount of coolant dripping. I am guessing about four ounces,maybe a bit more. It only seems to be leaking at night as each time I am driving at shutdown I check to see if it is leaking I see no coolant leaking. My mechanic told me today he thinks it may be leaking at the timing cover. he said it is a big job to repair. Any suggestions ? Thanks.

[gomer pyle]

i would get a new mechanic. i would bet on water pump.
http://www.dieselsite.com/1996-2003f...waterpump.aspx