Overheating engine

[capt smitty]

2002 6.2 l engine still getting over heating alarm after exhaust manifolds, risers, thermostat and impellar replaced.
running at 180 degrees What else could be the problem???

[mmwjr]

6.2, closed cooling?

Have you used an IR temp sensor to take reading of spots on the engine and exhaust to confirm its hot and not a faulty alarm?

[shrew]

Clogged heat exchanger (If there is closed cooling). Did you burn out an impeller? IF so, did you recover all the blades?

[Kevlar7r]

Try changing the alarm sender.

You said running at 180, so i assume your gauge sender is working. Same water stream, should read the same temp. Sounds like the sender is bad.

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