Why is my 2008 Mitsubishi Triton overheating?
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Asked by Bethany
My 2008 Mitsubishi Triton GLXR is overheating. Is there a recall on this model?
Answered by CarsGuide
17 Feb 2025There wasn’t a recall for this problem on this model, but there was a service bulletin (like a recall but for a non-safety related issue). The problem was the same as yours; examples of this diesel engine were overheating. The cause was deemed to be a loss of coolant and was related to poor cylinder-head gasket sealing. In turn, that was deemed to be the result of a too-rough metal surface on the cylinder block where it joined the cylinder head and sandwiched the gasket.
Mitsubishi introduced measures such as a different coolant concentration, a different radiator cap and an ECU that gave more warning to the driver. But none of these things actually fixed the issue with the head gasket and the metal surfaces. In fact, it wasn’t until 2014 production that Mitsubishi changed the machining process on the production line to give a smoother head-gasket sealing surface which solved the problem for good.
It seems that some engines had problems while other simply did not. Hard use such as towing heavy loads or driving at sustained high speeds made the problem more likely to surface.
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