Originally Posted by freelandken
Since there is no way of sugarcoating my major blunder, here are the facts.
I ran the engine without water circulating, for 20-30 minutes before overheating alerted me to the problem. I immediately switched the valve so that water would circulate. The engine cooled down somewhat but lost
probably all coolant. Since that time I have replaced the thermostat, although it seemed to be ok. The impeller was destroyed and changed. I removed the hose to the rear of the engine where the remaining pieces of impeller were residing and sucked out a good many pieces with my shop vac
. Replaced coolant. Checked oil
. No leaks
that I can see. However, the engine is still overheating (210+-) Any ideas? The engine has only 1500+ hours.
First step is always checking the obvious
Did you get all
the pieces out, especially the tiny ones that maybe went further into you raw water
circuit. Can you account for every last piece?
Apart from physically looking at the recovered pieces, you can weigh them along with the remaining impeller body and compare weight to a new impeller. Of course there will be some difference but the amount of difference may be telling.
Engine is not normally badly damaged by a single
short overheat problem so there is a fair chance that your heat exchanger
is still blocked somewhere.
Good luck and let's hope it is a simple fix!