wrote in message
oups.com...
One of my 250hp cummins 5.9bta's runs hot. I've been carefull to keep
the rpm's low enough that it doesn't overheat but I need to find
someone who really knows what they're doing to fix this. A highly
recommended mechanic already tried most of the obvious things to no
avail.

Can anyone recommend a diesel mechanic in the Seattle area?

Thanks,
Neil
I take it that it requires running under load to overheat. Take it for a
short trip, feel the hoses for tightness/pressure. Follow the waters path
in and out of heat exchangers, transmissions, exhaust manifolds etc. If
hose going in is tight but going out slightly spongy there is your problem.
Blockage!