Coolant leak
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Mountain Pass
Joined: Jul 2016
Posts: 117
Likes: 3
Coolant leak
I am the original owner of my 2005 F350 6.0. It’s stock. I have a coolant leak at the passenger side rear of the engine. Originally I thought it was the water pump but it’s definitely leaking at the rear of the engine on the passenger side. Could it be from the HVAC/heating plumbing. Not a lot of room to see where the leak is coming from. 173,000 on the truck
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Get some UV cooling system dye and put it in and run for a bit. Then check with a UV flashlight (black light).
I have found that it takes two bottles of the stuff.
Do you have an EGR deletes? If yes check around the hoses.
I have found that it takes two bottles of the stuff.
Do you have an EGR deletes? If yes check around the hoses.
Postmaster
Joined: Sep 2016
Posts: 3,941
Likes: 240
From: Texas
Check the heater core y pipe and quick connect fittings that go into the heater core at the firewall above the AC box. Pretty common, there is a thread with a replacement solution for the plastic y pipe and heater core connections.
Postmaster
Joined: Sep 2016
Posts: 3,941
Likes: 240
From: Texas
Do the trucks not have the y pipe and just inlet and outlet above the box? Excursions have the y pipe because there is a second heater core in the rear. I would still check those heater core quick connects, the o rings inside can leak, mine both started leaking around 170k.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Do the trucks not have the y pipe and just inlet and outlet above the box? Excursions have the y pipe because there is a second heater core in the rear. I would still check those heater core quick connects, the o rings inside can leak, mine both started leaking around 170k.
If you have a coolant filter also check the hoses and connections.
That was one of my leaks.
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Fleet Mechanic
Joined: Jul 2018
Posts: 1,629
Likes: 103
From: Jacksonville Florida
That is another good point. I have a coolant filter that one hose leaks.
I been lazy. But that would show up on the front of the motor or quick inspection.
It's them sneaky leaks, where there not sure.
I been lazy. But that would show up on the front of the motor or quick inspection.
It's them sneaky leaks, where there not sure.
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