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12-01-2017, 08:50 PM
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#1
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Senior Member
City: Goldsboro NC
Vessel Name: Voyager
Vessel Model: 41' PT Europa
Join Date: Jan 2017
Posts: 162
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Generator Heat Exchanger
I’ve got a 1991 Diesel Generator with the original heat exchanger. No sign of and problems. Should I️ just clean it and continue to use it? What’s the worse that could happen if it were to fail?
Raw water and freshwater mix?
I don’t mind purchasing a new one if it could cause some sort of damage to the engine if it fails, but don’t want to spend the $300. If it’s not necessary.
What’s your thoughts?
Thanks
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12-02-2017, 02:07 AM
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#2
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 4,309
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Pay me now or pay me later, your choice.
If you are concerned, pull off the heat exchanger and have it pressure tested, if it passes and you are diligent about changing zincs then there is little to worry about.
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12-02-2017, 08:59 AM
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#3
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Guru
City: North Carolina for now
Join Date: Aug 2011
Posts: 6,348
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Quote:
Originally Posted by tiltrider1
Pay me now or pay me later, your choice.
If you are concerned, pull off the heat exchanger and have it pressure tested, if it passes and you are diligent about changing zincs then there is little to worry about.
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Exactly, might as well have it professionally cleaned while it's out. Hopefully Ski NC will chime in for good places to have it done, where in NC is the boat?
__________________
George
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
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12-02-2017, 09:17 AM
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#4
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Senior Member
City: Goldsboro NC
Vessel Name: Voyager
Vessel Model: 41' PT Europa
Join Date: Jan 2017
Posts: 162
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Boat is in Arapahoe . I’m in Goldsboro. There’s a radiator shop here that can clean and pressure test it. Think that will be my plan of action.
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12-02-2017, 11:14 AM
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#5
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,149
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Pressure testing just tells you one thing...good for today, not necessarily tomorrow.
Trans and oil coolers are way more critical than a heat exchanger.
A heat exchanger that fails is you either loose coolant or dilute coolant.
Both can be monitored and alarmed.
Replacement is good risk management, but not the only solution..... with failure probably not resulting in any significant damage from what several experts have told me.
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12-02-2017, 02:17 PM
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#6
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Guru
City: hawaii
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 873
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Just a visual inspection is the first step, pull off the covers and have a look.
Take pictures, post them up.
__________________
You can lead a horse to water,
But you can't make him ski...
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12-02-2017, 02:33 PM
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#7
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Guru
City: Inside Passage Summer/Columbia River Winter
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 8,050
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If its running great why mess with it? Flush the genny cooling system, put in fresh antifreeze and call it good.
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12-02-2017, 06:32 PM
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#8
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Guru
City: North Carolina for now
Join Date: Aug 2011
Posts: 6,348
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Quote:
Originally Posted by psneeld
Pressure testing just tells you one thing...good for today, not necessarily tomorrow.
Trans and oil coolers are way more critical than a heat exchanger.
A heat exchanger that fails is you either loose coolant or dilute coolant.
Both can be monitored and alarmed.
Replacement is good risk management, but not the only solution..... with failure probably not resulting in any significant damage from what several experts have told me.
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Have to disagree with all of that.
First, I doubt strongly his generator has an oil cooler and certainly not a trans cooler.
Second a failed heat exchanger can ruin coolant water pumps (don't ask me how I know this). Depending on engine design cause corrosion issues further into the cooling system. Cleaning the HX is a key piece of PM,as is occasionally testing it.
If the guy doesn't know when the last time it was cleaned or tested, why discourage him from doing so? People on internet forums do tend to play fast and loose with other people's money and equipment.
__________________
George
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
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12-02-2017, 07:44 PM
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#9
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Guru
City: East Coast
Vessel Name: M/V Maerin (Sold)
Vessel Model: Solo 4303
Join Date: Jun 2013
Posts: 886
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Remove it, have it cooked clean, pressure test it, and re-install it. You'll know that it's OK at that point, but unfortunately, no assurance that it will be OK the following day.
OTOH, with the age of the HX in question, with not quite as much effort as the drill above, you could replace it and have more assurance that it'll last longer, probably close to the same interval that brought it to the present.
If you're cruising to remote areas and your genset is mission-critical, you may want to consider having a spare on board. Then run it till it fails. It's a lot less trouble than having to order a replacement and have it shipped to you when you're in the boonies. (Like the Bahamas!- I can tell you it's EXPENSIVE!)
Bottom line, it's a decision the OP must make, taking into consideration all the options that apply to his particular circumstance.
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12-02-2017, 10:07 PM
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#10
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,149
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Just passing along my comnercial and personal experience plus advice from experts more than "cruiser joe''s".
Not playing any faster or looser with peoples money or equipment any more than the other end of the spectrum ....which can be excessive PM or early replacement which sometimes runs rampant here on TF.
A lot can be said for closely monitoring....but sure, if the age/condition is suspect.... replace.
But my main point is a HE failure that is caught early is usually no big deal...but you do have to catch it.
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