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Over heating port engine
- Jay Fusaro
- Scurvy Dog
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- Joined: August 8th, 2022, 11:41 pm
- Vessel Info: 1998 445 Aft Cabin
- Location: Missouri
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Over heating port engine
Thanks in advance,
Jay
- km1125
- Admiral
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Re: Over heating port engine
Do you know if the current impeller is still in good shape? I've seen new ones not last for very long, so it might be a simple fix.
- Tireless
- Commander
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- Vessel Info: 2006 Carver 44 CMY
Volvo Penta D6 370 HP - Location: Port Severn, Ontario
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Re: Over heating port engine
Make sure you coolant levels are good, as well.
Just my thoughts, however, I guess there are other things that could cause the problem.
Greg
- Jay Fusaro
- Scurvy Dog
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Re: Over heating port engine
km1125 wrote:Source of the post yea, definitely should tear some stuff apart to see if you can find all the pieces. If that engine has an intercooler (or aftercooler) you might want to have that popped open to see if the passages in there are clean too.
Do you know if the current impeller is still in good shape? I've seen new ones not last for very long, so it might be a simple fix.
Thank you - yes it does have an aftercooler - as you can imagine it's a PIA to take the top off because the access to the engines is by lifting up the stairs from the dinette rather than the salon floor If we run out of places to look I see a new hatch in my future.
- Jay Fusaro
- Scurvy Dog
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- Location: Missouri
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Re: Over heating port engine
Tireless wrote:Source of the post It almost seems like a flow issue. Engines are close cooled, however, sea water not able to keep the engines cool at higher RPMs. Sounds like you may have already figured out what the issue is. May have to start removing some things to check for the blockage.
Make sure you coolant levels are good, as well.
Just my thoughts, however, I guess there are other things that could cause the problem.
Greg
Thanks Greg - that's what we're thinking (flow issue). Coolant level is good and the new impeller has been inspected. We really believe we missed a piece of the old impeller - I'm just trying to be sure that we're not missing another possibility.
- bud37
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Re: Over heating port engine
- Jay Fusaro
- Scurvy Dog
- Posts: 35
- Joined: August 8th, 2022, 11:41 pm
- Vessel Info: 1998 445 Aft Cabin
- Location: Missouri
- Has thanked: 67 times
- Been thanked: 2 times
Re: Over heating port engine
bud37 wrote:Source of the post Have your cooling system pressure tested if you can after looking for all the bits.......there can be all sorts in the heat exchanger tubes. (scale etc )
Good idea! I didn't think of that. Thank you.
- Phrancus
- CYO Supporter
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Re: Over heating port engine
I've had this with my engines (with sterndrives) and you just keep worrying if you flush, solve the issue but are not sure you got it all out. In fact, the problem reoccurred some time later after a piece that was moved by the flushing relocated itself. Luckily it came out right at the first hose I disconnected but it was not a good experience.
It's a big design failure that a desintegrating impeller can move upflow in big enough pieces to block a heat exchanger.
- km1125
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Re: Over heating port engine
Had a friend just do that on his genset. The impeller was easy to change but the old one was missing pieces. It would have been quite a job to get down to where the heat exchanger was on the generator to get the hoses off there, but he could slide the bilge pump hose into the water hose starting at the water pump, and slide it all the way down to the heat exchanger and got all the missing pieces out.
- bud37
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Re: Over heating port engine
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