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Pathfinder turbo diesel, 135,000 k using excessive coolant but no sign of coolant in oil and no oil contamination of coolant. Radiator pressure tests fine and coolant gas test is clear. No sign of coolant leaks Power breaks down under load acceleration and then picks up again. Also failed in cruise control while towing a van. And: Where is the coolant going??

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Out the exhaust, unless a small amount of coolant
is going into the transmission

Have to use an exhaust gas analyzer at the exhaust
tail pipe or coolant fill cap or over flow container

You got a failed head gasket or worse, a crack that opens
up whenever it wants to

Posted on Nov 18, 2014

Testimonial: "Thank you. I wd agree but three diesel mechanics insist the head and head gasket are fine. don't know if I posted - it is a now fairly notorious 2005 Pathfinder.Transmission is last possible check. Tks."

  •  patrick boyce
    patrick boyce Nov 19, 2014

    Coolant gas test is clear...

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