Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-07-2021, 07:42   #16
Registered User

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 5,147
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by flightlead404 View Post
T

It had not occurred to me the issue could be the water heater. For those that mentioned that, could the water heater leak internally, ie coolant into the hot water side? Otherwise I'd assume that leaks would be obvious from external inspection of the heater and hoses?
It is possible for the hot water system to leak internally, but if you keep the freshwater pump turned on and the system pressurized to 35 psi, the leaks would be going the other way.
donradcliffe is offline   Reply With Quote
Old 09-07-2021, 08:25   #17
Registered User

Join Date: Jun 2013
Posts: 10
Re: How much coolant loss is normal/acceptable?

In my case, the coolant loss from the hoses connected to the water heater. There was evidence of evaporated antifreeze that had left behind crystals. I replaced the water heater and their hoses of 22 feet. Then it is necessary to burb the chamber. To monitor the level in the overflowing, I marked lines every 1/4 Inches on a blue tape and labled each line with a number. Then I noted the level when cold and hot. I found leaks from hoses soon after. After tightening the clamps I have no more loss, but the level increases the same amount when hot.
__________________
1999 Catalina 36 Sail La Vie
San Mateo, CA
SouthBaySailor is offline   Reply With Quote
Old 09-07-2021, 14:57   #18
Marine Service Provider
 
Emmalina's Avatar

Join Date: Jan 2012
Location: Thailand
Boat: Herreshoff Caribbean 50
Posts: 823
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by Squanderbucks View Post
Does your installation have a “puke” tank mounted? If you fill the heat exchanger and run the engine to fully heat it up and heat sink the whole thing the coolant will expand and drain out the little vent under the spring seal on the pressure cap. You loose that amount without a recovery bottle ( another name for it).
With the system full and the puke tank about 1/4 full the fluid will go back and forth as needed and the hx will stay full to the top. These are available as aftermarket from auto supply if your engine manufacturer doesn’t make one.
Mount somewhere in front or off to the side of the hx and run the included tube into the bottom of the tank and it is good to go.
Maybe once a year it might get a little water or coolant added to the puke tank.
Think the term expansion tank rings a little better !
__________________
Steve .. It was the last one that did this !
Emmalina is offline   Reply With Quote
Old 09-07-2021, 15:52   #19
Registered User

Join Date: Oct 2020
Location: SE USA
Boat: Hunter 38
Posts: 464
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by donradcliffe View Post
It is possible for the hot water system to leak internally, but if you keep the freshwater pump turned on and the system pressurized to 35 psi, the leaks would be going the other way.
Either the pump is on or we're on dock water, either way system is pressurized so I guess that rules out internal leaks. I'll check the hoses/couplings this weekend.
flightlead404 is offline   Reply With Quote
Old 10-07-2021, 08:19   #20
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by flightlead404 View Post
To clarify, as apparently my original post wasn't clear, the level in the expansion tank/reservoir/puke tank is what I'm seeing change.

Coolant level in the heat ex itself is always right at the top.

I'm always checking this cold. ie check in the am before start, run for a day, check then next day before start.

There are no leaks I can see, into the bilge or elsewhere on the motor.

I recently, ie couple months ago, changed the coolant pump, a few hoses, and descaled the heat ex. idk if it was happening beforehand as the boat is new to me.

It had not occurred to me the issue could be the water heater. For those that mentioned that, could the water heater leak internally, ie coolant into the hot water side? Otherwise I'd assume that leaks would be obvious from external inspection of the heater and hoses?
Is it possible you have a pin hole in your heat exchanger and it is being pumped overboard? The only heat exchanger I've seen fail, (massive), was the other way, spewed out raw water, but that might vary dependent on engine type and extent of failure? The descaling would make me wonder.
Cadence is offline   Reply With Quote
Old 10-07-2021, 08:32   #21
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 31,324
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by Cadence View Post
Is it possible you have a pin hole in your heat exchanger and it is being pumped overboard? The only heat exchanger I've seen fail, (massive), was the other way, spewed out raw water, but that might vary dependent on engine type and extent of failure? The descaling would make me wonder.
I had a pinhole leak in my generator heatex. It's a very destructive problem.

I agree with RWidman that the only acceptable rate of coolant loss is zero. OP should track down the leak without delay.
__________________
"Parce que je suis heureux en mer, et peut-ętre pour sauver mon ame. . . "
Dockhead is online now   Reply With Quote
Old 10-07-2021, 09:55   #22
Marine Service Provider
 
boatpoker's Avatar

Join Date: Nov 2008
Location: Port Credit, Ontario or Bahamas
Boat: Benford 38 Fantail Cruiser
Posts: 4,887
Re: How much coolant loss is normal/acceptable?

Is there really a loss ?
1/4" down when cold and 1/4" up when hot = no loss.
__________________
it's not that I'm set in my ways but it's taken me 69 years to get it right and I ain't changin' now !
boatpoker is offline   Reply With Quote
Old 10-07-2021, 13:05   #23
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by boatpoker View Post
Is there really a loss ?
1/4" down when cold and 1/4" up when hot = no loss.
I guess the question is, is he topping it off every time or not or is it going down that 1/4" continually not just up and down? If up and down it is an imaginary problem.
Cadence is offline   Reply With Quote
Old 10-07-2021, 17:32   #24
Registered User

Join Date: Jan 2011
Location: Sydney
Boat: Farr 1020
Posts: 441
Re: How much coolant loss is normal/acceptable?

I had a leak in the calorifier just after I fitted a new engine. Old one was direct salt water cooled and it appeared the coil in calorifier had succumbed to corrosion as I started to pump coolant into the bilge. No expansion tank on the engine, although I have fitted a bottle now. Issue was solved with a new calorifier and I achieved the aim stated by several above, that there should be zero coolant leakage.
Djarraluda is offline   Reply With Quote
Old 10-07-2021, 18:07   #25
Marine Service Provider
 
boatpoker's Avatar

Join Date: Nov 2008
Location: Port Credit, Ontario or Bahamas
Boat: Benford 38 Fantail Cruiser
Posts: 4,887
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by Djarraluda View Post
I had a leak in the calorifier just after I fitted a new engine. Old one was direct salt water cooled and it appeared the coil in calorifier had succumbed to corrosion as I started to pump coolant into the bilge. No expansion tank on the engine, although I have fitted a bottle now. Issue was solved with a new calorifier and I achieved the aim stated by several above, that there should be zero coolant leakage.
Any leak in the water heater will instantly show up at the hot water tap in the galley.
__________________
it's not that I'm set in my ways but it's taken me 69 years to get it right and I ain't changin' now !
boatpoker is offline   Reply With Quote
Old 10-07-2021, 18:21   #26
Registered User

Join Date: Jan 2017
Location: Everywhere
Boat: 2011 FP Orana 44 M
Posts: 1,032
Re: How much coolant loss is normal/acceptable?

I haven't been doing this as long as the others, but I'm 3+ years in with no coolant loss on two engines.
LoudMusic is offline   Reply With Quote
Old 11-07-2021, 13:11   #27
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by boatpoker View Post
Any leak in the water heater will instantly show up at the hot water tap in the galley.
Scary coolant in potable water.
Cadence is offline   Reply With Quote
Old 12-07-2021, 07:55   #28
Registered User

Join Date: Oct 2020
Location: SE USA
Boat: Hunter 38
Posts: 464
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by Cadence View Post
Scary coolant in potable water.
Well that's not happening. I know the taste of that coolant , its not in the water.
flightlead404 is offline   Reply With Quote
Old 12-07-2021, 08:14   #29
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: How much coolant loss is normal/acceptable?

Quote:
Originally Posted by flightlead404 View Post
Well that's not happening. I know the taste of that coolant , its not in the water.
I hope it doesn't happen. I wonder how many PPM is detectable by taste or lethal over a prolonged period?

I wonder if there is something a kin to a litmus test that would be more definitive than taste?
Cadence is offline   Reply With Quote
Old 12-07-2021, 08:34   #30
Registered User

Join Date: Apr 2017
Location: NYC
Boat: Adams 45
Posts: 92
Re: How much coolant loss is normal/acceptable?

I don't drink hot water or use it in cooking, in which case you wouldn't detect it by taste. I only use it for washing dishes, face, and shower. I've cleaned out a residential hot water heater, admittedly an old one, and decided that water wasn't trusted.
pjShap is offline   Reply With Quote
Reply

Tags
coolant

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rudder Stability; how much movement is acceptable EmeraldCoastSailor Propellers & Drive Systems 1 29-10-2018 14:45
Coolant Loss Seadoc777 Engines and Propulsion Systems 3 04-06-2017 17:18
How Much Electrical Leakage is Acceptable? YPSILANTI Marine Electronics 7 30-08-2016 08:23
Volvo Penta MD2030D Coolant Loss Captain Hook Engines and Propulsion Systems 18 11-09-2013 06:39
Engine Coolant Loss rabend Engines and Propulsion Systems 25 31-05-2011 17:01

Advertise Here


All times are GMT -7. The time now is 09:40.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.