Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-07-2018, 13:04   #1
Registered User
 
Peregrine1983's Avatar

Join Date: Aug 2016
Posts: 774
Water heater mixing engine coolant

Hi all,

I recently noticed our hot water smells a little like engine coolant, and I suspect our older Raritan water heater's heat exchanger is corroded and allowing some coolant to mix in. This is no bueno for obvious reasons.

Do I have any options to fix this or do I just need to buy a new water heater?

Any help appreciated.

Edit: The heater is a 6-gallon Raritan 1700 series
__________________

Peregrine1983 is offline   Reply With Quote
Old 30-07-2018, 19:42   #2
Registered User

Join Date: Jan 2008
Location: SF Bay Area (Boat in La Paz)
Boat: Valiant V40
Posts: 601
Re: Water heater mixing engine coolant

Replace it.
Did mine recently, fortunately, it leaked water "out", no contamination.
__________________

jamhass is offline   Reply With Quote
Old 30-07-2018, 19:58   #3
Registered User

Join Date: Dec 2008
Location: Oriental, NC
Boat: Mainship Pilot 34
Posts: 1,461
Re: Water heater mixing engine coolant

Unlike the antifreeze used for winterizing water systems, engine antifreeze is toxic.

Replace that water heater NOW and don't drink any water, hot or cold until you do.

David
djmarchand is offline   Reply With Quote
Old 30-07-2018, 20:14   #4
Registered User
 
Peregrine1983's Avatar

Join Date: Aug 2016
Posts: 774
Re: Water heater mixing engine coolant

Quote:
Originally Posted by djmarchand View Post
Unlike the antifreeze used for winterizing water systems, engine antifreeze is toxic.

Replace that water heater NOW and don't drink any water, hot or cold until you do.

David
Thank you. We never use our boats tank water for drinking anyhow, but obviously donít want that stuff in the water we use to wash.
Peregrine1983 is offline   Reply With Quote
Old 31-07-2018, 05:33   #5
Registered User

Join Date: Feb 2015
Location: Eastern Pennslyvania
Boat: Island Packet 27
Posts: 9
Re: Water heater mixing engine coolant

[QUOTE=Peregrine1983;2685734]Hi all,

I recently noticed our hot water smells a little like engine coolant, and I suspect our older Raritan water heater's heat exchanger is corroded and allowing some coolant to mix in. This is no bueno for obvious reasons.

Do I have any options to fix this or do I just need to buy a new water heater?

Any help appreciated.

Edit: The heater is a 6-gallon Raritan 1700 series[/
Sparkplug1939 is offline   Reply With Quote
Old 31-07-2018, 06:07   #6
Registered User

Join Date: Feb 2015
Location: Eastern Pennslyvania
Boat: Island Packet 27
Posts: 9
Re: Water heater mixing engine coolant

If you donít need the hot water heater you can easily eliminate it by connecting the two hoses coming from the engine together.
Sparkplug1939 is offline   Reply With Quote
Old 31-07-2018, 06:12   #7
Registered User
 
AKA-None's Avatar

Join Date: Oct 2013
Location: Lake City MN
Boat: C&C 27 Mk III
Posts: 617
Re: Water heater mixing engine coolant

I like free hot water so Iíd replace it ymmv
__________________
Special knowledge can be a terrible disadvantage if it leads you too far along a path that you cannot explain anymore.
Frank Herbert 'Dune'
AKA-None is offline   Reply With Quote
Old 31-07-2018, 06:25   #8
Registered User

Join Date: Sep 2015
Location: Out of Norfolk Va
Boat: Tartan 37
Posts: 674
Re: Water heater mixing engine coolant

Replace is the right answer, no way to repair a water heater with an internal failure. But if you are unable to replace, by-pass the engine coolant right away. This is very dangerous, drinking water with antifreeze and I would flush the system after repairs made. If you do jump out the coolant loop, see if it's leaking water out the the engine coolant side. My bet it will, if not leaking. Check the resistance for a low reading, if Sat you might still be able to use the 120VAC heating elements while pierside.



Also if replacing, look at hot water heaters with the water mixing valve, or think about adding one. After a day's run, the water in a hot water heater can be 170F. This temperature is dangerously hot and can scalded you. The mixing valve can limit the output temp to a comfortable temp. Saves water, by not having to let water run till you get a proper temp and is much safer.
puffcard is offline   Reply With Quote
Old 31-07-2018, 14:03   #9
Marine Service Provider

Join Date: Jan 2012
Location: Lake Ontario
Boat: Douglas 32 Mk II
Posts: 2,833
Re: Water heater mixing engine coolant

Quote:
Originally Posted by Peregrine1983 View Post
Hi all,

I recently noticed our hot water smells a little like engine coolant, and I suspect our older Raritan water heater's heat exchanger is corroded and allowing some coolant to mix in. This is no bueno for obvious reasons.

Do I have any options to fix this or do I just need to buy a new water heater?

Any help appreciated.

Edit: The heater is a 6-gallon Raritan 1700 series
If you were in a colder climate. I would recommend verifying the smell is not from remnant winterizing plumbing antifreeze. If so, the system just needs to be flushed out better and sanitized.

To verify your concerns, disconnect the water heater from the domestic system. Drain the water heater. Run the engine with the drain open with a little pan under it. If coolant is leaking out of the HX loop, it will do so much easier when the potable side of the water heater is not pressurized. If you collect fairly concentrated coolant in the drain pan, BINGO, coolant loop break confirmed.

There is little chance you can repair the tank. Beware that Raritan products are 5 times better than lesser brands and about 3 times the price. Excellent service. Heed warnings about anode maintenance.
__________________
ramblinrod
ramblinrod is offline   Reply With Quote
Old 31-07-2018, 14:23   #10
Registered User
 
Peregrine1983's Avatar

Join Date: Aug 2016
Posts: 774
Re: Water heater mixing engine coolant

Thank you Ramblinrod. I have a feeling the anodes were never changed by PO's. I think I'm looking at a new Raritan unit.
Peregrine1983 is offline   Reply With Quote
Old 31-07-2018, 16:44   #11
Registered User
 
Capt Gill's Avatar

Join Date: Dec 2008
Location: Horseshoe Cove Sausalito/Currently in La Paz,BCS,Mex.
Boat: Ron Holland 43 Semi-custom Sloop
Posts: 214
Question Re: Water heater mixing engine coolant

A technical question: assuming this is a pressurised fresh water system (>20 psi) and the engine cooling system is limited to <10 psi when at operating temp. the opposite would occur, i.e., fresh water would be forced into the engine coolant. If this is true it would be prudent to include this in ones diagnostic parameters.
__________________
Jack
Capt Gill is offline   Reply With Quote
Old 31-07-2018, 19:54   #12
Registered User

Join Date: Sep 2013
Location: Alert Bay, Vancouver Island
Boat: 35ft classic ketch/yawl.
Posts: 1,586
Images: 4
Send a message via Skype™ to roland stockham
Re: Water heater mixing engine coolant

Quote:
Originally Posted by Capt Gill View Post
A technical question: assuming this is a pressurised fresh water system (>20 psi) and the engine cooling system is limited to <10 psi when at operating temp. the opposite would occur, i.e., fresh water would be forced into the engine coolant. If this is true it would be prudent to include this in ones diagnostic parameters.

It is possible for chemicals to clime up the pressure gradient by osmosis. depends on the pressure difference and antifreeze strength.
roland stockham is offline   Reply With Quote
Old 31-07-2018, 23:27   #13
Registered User
 
Capt Gill's Avatar

Join Date: Dec 2008
Location: Horseshoe Cove Sausalito/Currently in La Paz,BCS,Mex.
Boat: Ron Holland 43 Semi-custom Sloop
Posts: 214
Re: Water heater mixing engine coolant

Quote:
Originally Posted by roland stockham View Post
It is possible for chemicals to clime up the pressure gradient by osmosis. depends on the pressure difference and antifreeze strength.
Hmm, "chemicals to clime up the pressure gradient by osmosis", I can't see the connection among the words chemicals, clime, pressure gradient and osmosis, maybe you
can elaborate ?
__________________
Jack
Capt Gill is offline   Reply With Quote
Old 01-08-2018, 05:22   #14
Marine Service Provider

Join Date: Jan 2012
Location: Lake Ontario
Boat: Douglas 32 Mk II
Posts: 2,833
Re: Water heater mixing engine coolant

Quote:
Originally Posted by Capt Gill View Post
A technical question: assuming this is a pressurised fresh water system (>20 psi) and the engine cooling system is limited to <10 psi when at operating temp. the opposite would occur, i.e., fresh water would be forced into the engine coolant. If this is true it would be prudent to include this in ones diagnostic parameters.

When both systems are fully pressurized, the higher domestic water system pressure would force potable water into the coolant system, which would overflow the reservoir.

However, normally when a pressure pump starts cycling despite no faucet being open, most folks only turn on the pressure pump when domestic water is needed to prevent needless pump cycling due to a leak in the pump pressure chamber or potable water loss due to a leak in the domestic plumbing.

In this case, the majority of the time, the engine coolant pressure will be higher than the domestic water system pressure.
__________________
ramblinrod
ramblinrod is offline   Reply With Quote
Old 01-08-2018, 17:41   #15
Registered User
 
Capt Gill's Avatar

Join Date: Dec 2008
Location: Horseshoe Cove Sausalito/Currently in La Paz,BCS,Mex.
Boat: Ron Holland 43 Semi-custom Sloop
Posts: 214
Re: Water heater mixing engine coolant

"When both systems are fully pressurized, the higher domestic water system pressure would force potable water into the coolant system, which would overflow the reservoir."
Yes, I agree.

"However, normally when a pressure pump starts cycling despite no faucet being open, most folks only turn on the pressure pump when domestic water is needed to prevent needless pump cycling due to a leak in the pump pressure chamber or potable water loss due to a leak in the domestic plumbing."
If this is the case, (it wasn't stated, so we don't know) then removing the two hoses at the HX & connecting them together, turn on the domestic water pump & heater switch then wait to see if any domestic water comes out of the disconnected HX tubes.
Although the odds heavily favour a defective water heater it's nice to know for sure.


"In this case, the majority of the time, the engine coolant pressure will be higher than the domestic water system pressure."
Yes, if the engine warm to hot and the domestic water pump is off, otherwise no.
____
______________
__________________

__________________
Jack
Capt Gill is offline   Reply With Quote
Reply

Tags
coolant, water, engine

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
is there a diesel water heater that works with electricity and engine coolant ? Brann- Plumbing Systems and Fixtures 23 08-02-2018 05:30
How to flush F/W cooling and water heater coolant? hlev00 Engines and Propulsion Systems 2 22-10-2016 17:14
Perkins 6.354 coolant connection to water heater Cyber Mike Engines and Propulsion Systems 2 12-09-2013 15:28
How to connect raritan 12 gal water heater to Perkins engine coolant edwmama Plumbing Systems and Fixtures 2 08-07-2012 05:26
Salt Water Mixing w/Coolant, Heat Exchanger Michael Jones Engines and Propulsion Systems 2 14-11-2009 19:32

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.