Coolant leak
Thread Starter
|
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.
Trending Topics
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.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post