Volvo TAMD 63 Running warm

ThreeQueens

ThreeQueens

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End of last season last year engine ticked up in temperature right after riding through a small piece of low bottom.
During off season removed pump found 2 fins on impeller partially folded over in opposite direction of other fins. Inspected inside of pump and found small mussel shell fragments. I washed it out and replaced with a new impeller. Ran this year when boatlaunched still running warmer than other engine.

Does anyone think raw water pump itself was damaged?
 
Probably not. Unless it is deeply scored they are pretty resilient. You may have sucked muck up into the heat exchangers. The 63P heat exchangers are pretty easy to strip and clean. From memory the raw water on a 63p goes from the pump to the charge air cooler via a long ish rubber hose. I would pull that off and have a look inside. With a phone camera you may be able to take some pics of the input side of the charge air cooler matrix and see what's in there too. It should give you clea clues as to what to do next.
However before you do get an infra red thermometer and check the engine is actually running warmer by measuring the external temp of the thermostat housings and comparing the two engines.
 
ThreeQueens said:
End of last season last year engine ticked up in temperature right after riding through a small piece of low bottom.
During off season removed pump found 2 fins on impeller partially folded over in opposite direction of other fins. Inspected inside of pump and found small mussel shell fragments. I washed it out and replaced with a new impeller. Ran this year when boatlaunched still running warmer than other engine.

Does anyone think raw water pump itself was damaged?
Click to expand...

kashurst said:
Probably not. Unless it is deeply scored they are pretty resilient. You may have sucked muck up into the heat exchangers. The 63P heat exchangers are pretty easy to strip and clean. From memory the raw water on a 63p goes from the pump to the charge air cooler via a long ish rubber hose. I would pull that off and have a look inside. With a phone camera you may be able to take some pics of the input side of the charge air cooler matrix and see what's in there too. It should give you clea clues as to what to do next.
However before you do get an infra red thermometer and check the engine is actually running warmer by measuring the external temp of the thermostat housings and comparing the two engines.
Click to expand...
 

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ThreeQueens said:
Did use infrared last year port side is running warmer.
Click to expand...
Ok so it is definitely running hotter - as gauges/sensors get older they can misread a bit so always worth a check.
That impeller is past it. Any idea how old it is? They can take a set/distort if they are either old or properly over heated. Basically the rubber hardens and they loose their flexibility etc.
Either way I would be looking inside the heat exchangers and associated pipes next to see if there is anything obvious.
It could be the water pump but it's an expensive experiment to test just that. New heat exchanger seals are a lot cheaper than a new water pump.
 
kashurst said:
Ok so it is definitely running hotter - as gauges/sensors get older they can misread a bit so always worth a check.
That impeller is past it. Any idea how old it is? They can take a set/distort if they are either old or properly over heated. Basically the rubber hardens and they loose their flexibility etc.
Either way I would be looking inside the heat exchangers and associated pipes next to see if there is anything obvious.
It could be the water pump but it's an expensive experiment to test just that. New heat exchanger seals are a lot cheaper than a new
Click to expand...
 
kashurst said:
Probably not. Unless it is deeply scored they are pretty resilient. You may have sucked muck up into the heat exchangers. The 63P heat exchangers are pretty easy to strip and clean. From memory the raw water on a 63p goes from the pump to the charge air cooler via a long ish rubber hose. I would pull that off and have a look inside. With a phone camera you may be able to take some pics of the input side of the charge air cooler matrix and see what's in there too. It should give you clea clues as to what to do next.
However before you do get an infra red thermometer and check the engine is actually running warmer by measuring the external temp of the thermostat housings and comparing the two engines.
Click to expand...
Or try a borescope?
 
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