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+--- Thread: [Tiara Coronet] Engine overheat, impeller replaced, impeller blades disintegrated, where did they go? (/showthread.php?tid=7008)
Engine overheat, impeller replaced, impeller blades disintegrated, where did they go? - WestO - 08-09-2020
2003 Tiara 2900 Coronet
Twin 5.7 crusader captains choice engines carbureted
Starboard engine overheated and shutdown
changed starboard impeller w new. All blades fins had disintegrated on old impeller (see attachment of whats left of Sherwood impeller)
That fixed most of the problem
except starboard engine running 10 to 20 degrees hotter than port 
Think missing impeller blades are reducing flow maybe?
I see many others have had impeller blades disintegrate also.
Question: Where is the most likely, easiest place to look for the missing blades? Anyone with experience extracting detached impeller blades fins after the fact?
Ordered 2 more impellers, will replace port impeller before is does the same thing + have one spare.
RE: Engine overheat, impeller replaced, impeller blades disintegrated, where did they go? - Sans Peur - 08-09-2020
The impeller blades are blocking flow. Thats why it is running hotter. Start looking down stream from the impeller pump. Most of them are probably in the first cooler (oil, trans,,) Some may have gone further so it would be good to keep going until you dont find anything.
Don't know if yours is fresh or raw water cooled. If fresh (has antifreeze) then they are probably in the heat exchanger. Its usually on the top front of the engine. Go there first.