Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-11-2018, 07:56 PM   #1
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 14,358
Cleaning heat exchanger tubes

Salt corrosion in the tubes of the heat exchanger limit the effectiveness of the unit. When my temp got up to 240 degrees I knew I had a problem. It has always run on the warm side at an indicated 200 to 205 degrees. I found the thermostat was a 180. I had assumed it was 190 or even 200. I think my gauge is not accurate. My heat gun said the top of the thermostat housing was 184 degrees when the engine was stabilized. The engine was at 1400 rpm in gear at the dock/float.

The last time I cleaned them I used a wood dowel. Cooling-wise the engine was better controled and more stable after.

This time I first “rodded” the tubes out w a 1/8ths inch threaded rod. Was not big enough and not effective enough. The tubes are 3/16” ID. Remember 37hp engine. I have found high carbon drill rod (I think that’s what the guy at Tacoma Screw said) that’s only 1/64ths” less than 3/16”. So I think I’ve got a large enough ram to get most all the hard corrosion out.

OK what do you guys do? Or how is it done in a shop?
__________________
Advertisement

__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 05-11-2018, 08:42 PM   #2
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 10,690
Greetings,
Mr. mb. Personally, I would not use solid metal. A wire brush or wooden dowel perhaps. My "go to" method has been chemical cleaning which has cleaned to my satisfaction.
__________________

__________________
RTF
RT Firefly is offline   Reply With Quote
Old 05-11-2018, 08:48 PM   #3
Veteran Member
 
Tootles's Avatar
 
City: Leamington ON
Country: Canada
Vessel Name: Tootles
Vessel Model: Nordic 26
Join Date: May 2017
Posts: 45
Interesting what chemical is safe to use? Jim
Tootles is offline   Reply With Quote
Old 05-11-2018, 08:54 PM   #4
Guru
 
Lou_tribal's Avatar
 
City: Quebec
Country: Canada
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 2,526
Up here we use white vinegar to clean up car carpet full of salt crust in winter as it dissolves salt almost immediately, would soaking the exchanger in white vinegar overnight be something that would work? Just asking as stupid the question could seem

L
Lou_tribal is online now   Reply With Quote
Old 05-11-2018, 09:20 PM   #5
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 10,690
Greetings,
There are a wide variety of chemicals and methods to be had. I strongly suspect this topic has been discussed on TF several times but where to look? I haven't a clue. Maybe one of the mods or another member can point you/us in the right direction. I've used dilute Muriatic acid when I had the exchangers off the last time as well as a product called "Salt Away" I think. I've never "rodded" the tubes.

Edit: Just took a quick search for "cleaning heat exchanger" here on TF and a number of threads popped up. MUCH better advice than I can offer.
__________________
RTF
RT Firefly is offline   Reply With Quote
Old 05-11-2018, 10:09 PM   #6
Senior Member
 
HeyJude's Avatar
 
City: Boerne, Tx
Country: USA
Vessel Name: HEY JUDE
Vessel Model: Kadey Krogen 36 Manatee #46
Join Date: Jan 2011
Posts: 240
Deleted Phosphoric purchased at HD in paint dept. I’ve been told that this is the active ingredient in Barnicle Buster & safer than mutatic.
__________________
HEY JUDE, a 1986 Kadey Krogen 36 Manatee, #46 of 99. After 13 yrs on Lake Travis she's on Clear Lake TX being prepped for coastal cruising.
HeyJude is offline   Reply With Quote
Old 05-11-2018, 10:53 PM   #7
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 14,358
RTF wrote;
“I would not use solid metal”
I was hesitalt about that too .. but .. I don’t know if the heat exchanger tubes/metal are coated w anything that could be scratched off and promote fast salting down the road. But the end I plan to cut off at an angle so it can act a bit like a drill. And this is very hard steel. Ideally I’d find some brass. But the rod itself is very smooth. Do you know how hard the tubes are or what metal they’re made of?

I’ve tried a wire bottle brush but it was big enough to smash down the brass looking wires thus making them useless.
One nice thing about a wood dowel is that a 3/16” dowel could be quickly sanded down to fit well.
But unless I use a drill there will be no path for the materal loosened or cut to exit. That’s a plus as I’ll have to use a hose w a nozzel to flush out the salted material many times ... water water everywhere.

I don’t want to remove the heat exchanger as I’ll need to cut off and replace four large and long hoses. And who likes more work?
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 05-11-2018, 10:59 PM   #8
Opu
Veteran Member
 
City: Oceanside
Country: USA
Vessel Name: Cheers
Vessel Model: Bayliner 32
Join Date: May 2014
Posts: 92
Maybe a rifle cleaning rod with a bronze brush end fitting? They come in various sizes to fit different calibers....
__________________
Dick
M/V Cheers
Oceanside
Opu is offline   Reply With Quote
Old 05-12-2018, 12:10 AM   #9
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted trawler
Join Date: Jul 2016
Posts: 1,276
Salt water pool filter cleaner is diluted phosphoric at close enough to the same dilution as one of the expensive marine cleaners.

I have plastic rods as well
Simi 60 is offline   Reply With Quote
Old 05-12-2018, 05:19 AM   #10
Veteran Member
 
George Harmon's Avatar
 
City: Indian Harbour Beach
Country: United States
Vessel Name: Blue Moon
Vessel Model: Mainship Pilot 30 Rum Runner II
Join Date: Jan 2018
Posts: 31
Its my understanding that the tube bundle should be removed so the outside of the tube bundle can be descaled and cleaned as well.
George Harmon is offline   Reply With Quote
Old 05-12-2018, 06:45 AM   #11
Guru
 
Tom.B's Avatar
 
City: Cary, NC
Country: USA
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,410
Cleaning of heat exchanger tubes

We cleaned ours last summer. I did two things. Since ours was the turbo intercooler, it had soot on the outside of the tubes. I soaked it in Purple Power for a couple of days, rinsed, and then went to WalMart’s canning section and got a couple of little containers of citric acid granules. It shined them up like a new penny.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
Tom.B is offline   Reply With Quote
Old 05-12-2018, 06:51 AM   #12
Senior Member
 
Russell Clifton's Avatar
 
City: Anacortes Wa.
Country: usa
Vessel Name: Sea Fever
Vessel Model: Defever 49 RPH
Join Date: Sep 2012
Posts: 363
Cleaning it with chemicals would be the preferred method. You can damage the tubes by running a rod down thru them. There are two products that are popular. One is Barnacle Buster and the other is Rydlyme. Barnacle Buster is easier to find. Here is a link to their web site.

http://https://trac-online.com/produ...AE-concentrate

I used a 5 gallon bucket and a small bilge pump along with some hose to make connections to the inlet and outlet of the heat exchanger's to circulate the product thru the system ( my Lehman's have 3 exchanger's ) . Instructions will be on the bottle or watch the video's on their web site.
Russell Clifton is offline   Reply With Quote
Old 05-12-2018, 07:06 AM   #13
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 2,936
Quote:
Originally Posted by Opu View Post
Maybe a rifle cleaning rod with a bronze brush end fitting? They come in various sizes to fit different calibers....
That's what I have used in the past. Then a quick drizzle thru with muriatic acid and a flush.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 05-12-2018, 07:19 AM   #14
Guru
 
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 883
I use Rydlyme because it's biodegradable and when I'm done it can be dumped over the side.
Attached Files
File Type: pdf RydlymeMarine_Recreational2.pdf (1.22 MB, 13 views)
Lepke is offline   Reply With Quote
Old 05-12-2018, 09:07 AM   #15
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 14,358
Not being a gun guy I didn’t think of rifle cleaning.
What is the rod made of?
Wonder if I’d need two sizes?

Rydlyme sounds really good. Sounds like they recomend running it through the whole seawater system. Hmmmm .. and “dumping into the sea”.

I’ll go to the gun store and check the rifle bore cleaners. Find some Rydlyme and do the 5gal bucket thing. Sounds like I wouldn’t need the gun brushes though ..? I could get wood doweling and pass it through the flues to check if all the corrosion is gone. But the wood will swell. Don’t want it stuck in the flue.
Better get down there and cut off the hoses and remove the heat exchanger. Drain the engine coolant ect. This is turning into a biggish job. UGH! And I just changed the coolant.

jleonard,
Why did you use the muriatic acid? How did you perform the “quick drizzle through”? My heat exchanger is horizontal .. intsalled.

Russell C,
No mechanical ... just circulate the “stuff”?

Tom B,
How can soot get into the coolant?

George H,
Don’t even know if that’s possible. And the outside has seen nothing but coolant.

As to the steel rod damaging the flues .. how exactly would that happen? Are the flues coppernickle steel?
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 05-12-2018, 09:07 AM   #16
Guru
 
kchace's Avatar
 
City: Brookline, NH
Country: USA
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 904
I used Barnacle Buster with the "small bilge pump in a 5 gallon bucket method" and it worked extremely well. Turn it on, come back in a hour - done.
kchace is online now   Reply With Quote
Old 05-12-2018, 09:09 AM   #17
Veteran Member
 
City: Nottingham, NH
Country: USA
Vessel Name: Pearl
Vessel Model: Cape Dory Trawler 28 #18
Join Date: Sep 2015
Posts: 27
Barnacle Buster did the trick for me. They recommend recirculating it through the system with a pump and reservoir. I just let it sit overnight and ran the engine for 20 minutes after. Amazing what comes out. Supposedly biodegradable.
MacDuff is offline   Reply With Quote
Old 05-12-2018, 09:25 AM   #18
Senior Member
 
Russell Clifton's Avatar
 
City: Anacortes Wa.
Country: usa
Vessel Name: Sea Fever
Vessel Model: Defever 49 RPH
Join Date: Sep 2012
Posts: 363
Should not need to remove the heat exchanger to do this. Just need to figure out how to remove a hose going into one end and connect it to the hose from your solution and then remove a hose at the other end and let that drain back into the bucket so the solution is circulated. You may need to use some imagination to come up with some adapters.

If you are going to go to the trouble to remove it just take it to a radiator shop and have it cleaned.
Russell Clifton is offline   Reply With Quote
Old 05-12-2018, 10:00 AM   #19
Guru
 
OldDan1943's Avatar
 
City: Aventura FL
Country: USA
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 1,857
The only reason for rodding a heat exchanger is that you are a great distance from a radiator shop. They can 'boil it out' with their magic potion.

I had my keel cooler of my N46 boiled out twice.
__________________
And you folks thought I knew what I was talking about?
OldDan1943 is offline   Reply With Quote
Old 05-12-2018, 10:05 AM   #20
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 2,936
[QUOTENot being a gun guy I didn’t think of rifle cleaning.
What is the rod made of?
Wonder if I’d need two sizes?
][/QUOTE]

Rods are usually aluminum, some are brass.
Start with a .22 brush, then go to whatever your tube ID is.
__________________

__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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





All times are GMT -5. The time now is 12:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012