Dunno, Dan, quits after two hours IS kinda puzzling. But unless you can find that specific symptom in a troubleshooting guide someplace...I'd still start with the basics, eliminate questions like head gasket
. As Holmes said to Watson, once you have eliminated everything else, whatever remains, no matter how improbable, is...something or other.
If it runs for two hours I'd think everything was good, after all, what can clog, leak, or otherwise stop after running faithfully for that long? No ignition system, so we can't suspect that. Fuel
clog or air in the lines? Wouldn't make it smoke, wouldn't let it restart.
What stops a diesel
? (Ignoring the two hours.) If it has fuel
, air, and compression
, it runs. The injectors and pump can be pulled and checked, maybe the injectors are haunted--but eyeballing them probably will confirm there's nothing wrong there. Leaving...? Maybe it "burps" and loses compression
, or ingests some coolant water
and quenches the flamefront in the cylinder, stopping the engine
? (Burp, as in the heat distortion finally catches up to it and allows something to open up?)
I had an engine
that drove me crazy, replaced the head gasket
after replacing the thermostat and everything else that might be causing a chronic overheat. STILL overheated--turned out to be a bad gauge sender. You betcha, I remember to check senders now.[g]