Need Some expertise. I’ve been dealing with a off and on coolant leak for over a year. I have had multiple techs search for a leak but come up empty each time. I’ve had coolant pressure test done with no leakage. The coolant leaks under the driver side fuel tank. Sometimes when I park on level ground, the truck doesn’t leak but other times it will after sitting a day. I’ve parked it on inclines and declines and at times it will never leak but other times it will. I’ve had shops try almost everything but nothing has cured the issue. Sometimes I have to put 2 bottles of coolant in my truck due to leak. Where the hell could the coolant be leaking out of? The only thing that seems reasonable is the coolant is leaking from somewhere connected to my thermoking apu. There’s no coolant in the fuel neither so I’m baffled. I just wake up or arrive to my truck with a small puddle of coolant under the driver side portion of my cab below the fuel tank. Again I’ve done pressure line tests and nothing comes out anywhere.
Freightliner Cascadia Coolant Leak
Discussion in 'Freightliner Forum' started by B$moove2U, Mar 31, 2019.
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shatteredsquare, ast26909 and B$moove2U Thank this.
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jacobstarowski and B$moove2U Thank this.
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The factory ac/heat unit for the bunk is also on that side. Bottom of cabinets, just behind driver seat.
Possible that the heater core or lines could be leaking.B$moove2U Thanks this. -
Good info here, you can also use coolant dye to check for this kind of leak.
Please move this tread to Freightliner forum.B$moove2U Thanks this. -
My sleeper heater core leaked in that exact location. Easy to change. They are only made of plastic-aluminum and prone to leaking. Two months after I changed it, the front one went too.
B$moove2U Thanks this. -
See this previous post if it is your heater core.
2016 Cascadia sleeper heater coreB$moove2U Thanks this. -
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