Reply
 
Thread Tools Display Modes
 
Old 03-08-2014, 12:06 PM   #1
Guru
 
Moonstruck's Avatar
 
City: Hailing Port: Charleston, SC
Country: USA
Vessel Name: Moonstruck
Vessel Model: Sabre 42 Hardtop Express
Join Date: Nov 2008
Posts: 7,853
Heat Exchanger Servicing

It is time for one of the most important items on a diesel engine to be serviced. The last thing you want is saltwater getting into your engine. With 2 each of engine, oil, transmission, and after cooler heat exchangers it is an expensive but necessary item. Oh yeah, don't forget the generator. New gaskets and seals as well as replacement for any corroded parts.

I thought while out of the water for hull sides and bottom painting it would be a good time to get it taken care of. With that done the only major thing left on my list is to spruce up the finish on the exterior teak. Then it's cruising time.
__________________
Advertisement

__________________
Don on Moonstruck
Sabre 42 Hardtop Express & Blackfin 25 CC
When cruising life is simpler, but on a grander scale (author unknown)
http://moonstruckblog.wordpress.com/
Moonstruck is online now   Reply With Quote
Old 03-08-2014, 12:13 PM   #2
Guru
 
fryedaze's Avatar
 
City: Solomons Island Md
Country: USA
Vessel Name: Fryedaze
Vessel Model: MC 42 (Overseas Ltd) Monk 42
Join Date: Sep 2011
Posts: 1,052
Oh crap! I thought I was doing good servicing the engine and tranny coolers this winter. I didnt even think about the genset. Thanks Don. More stuff to figure out here.
__________________

__________________
Dave Frye
Fryedaze, MC 42 (Monk 42') 1989 Overseas Co
http://mvfryedaze.blogspot.com/
fryedaze is offline   Reply With Quote
Old 03-08-2014, 12:23 PM   #3
TF Site Team
 
FlyWright's Avatar
 
City: California Delta and SF Bay
Country: Sacramento, CA, USA (boat in Vallejo)
Vessel Name: FlyWright
Vessel Model: Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 10,187
Thanks for the reminder, Don. A couple of years ago I cleaned and refurbished the stbd H/E during a manifold replacement but left the port go. Yesterday I changed the zincs in the H/Es and oil cooler.

Maybe it's time to remove the port H/E for a cleaning and refurbishment. Same for the oil coolers. How often do you guys remove and clean these units?
__________________
Al

Custom Google Trawler Forum Search
FlyWright is online now   Reply With Quote
Old 03-08-2014, 12:39 PM   #4
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,372
Here is a question - should transmission HXs be considered a threw away item after say 10 years. Unlike a plugged or failed engine HX, a failed tranny HX can be catastrophic, at least for the tranny anyway.
sunchaser is offline   Reply With Quote
Old 03-08-2014, 12:42 PM   #5
Guru
 
Moonstruck's Avatar
 
City: Hailing Port: Charleston, SC
Country: USA
Vessel Name: Moonstruck
Vessel Model: Sabre 42 Hardtop Express
Join Date: Nov 2008
Posts: 7,853
Quote:
Originally Posted by sunchaser View Post
Here is a question - should transmission HXs be considered a threw away item after say 10 years. Unlike a plugged or failed engine HX, a failed tranny HX can be catastrophic, at least for the tranny anyway.
That is probably a good idea.
__________________
Don on Moonstruck
Sabre 42 Hardtop Express & Blackfin 25 CC
When cruising life is simpler, but on a grander scale (author unknown)
http://moonstruckblog.wordpress.com/
Moonstruck is online now   Reply With Quote
Old 03-08-2014, 12:44 PM   #6
Guru
 
rochepoint's Avatar
 
City: Sidney BC
Country: Canada
Vessel Name: Rochepoint
Vessel Model: 1985 Cheer Men PT38 Sedan
Join Date: Apr 2009
Posts: 1,192
Just pulled my engine/transmission oil cooler off yesterday, after ten years she will get a new one installed next week........
__________________
Cheers Mike Barge
MV Rochepoint
Sidney, British Columbia.
"Yes, I have the right anchor"
rochepoint is online now   Reply With Quote
Old 03-08-2014, 01:14 PM   #7
Senior Member
 
bshanafelt's Avatar
 
City: Seattle, WA
Vessel Name: Isobel K
Vessel Model: 37' Custom Pilothouse
Join Date: Oct 2007
Posts: 289
I discovered this last year when I went to pop the drain plug off the gear cooler - it was rotted through. It was original from 1998, so I think I got my $$ worth.

A new cooler was put in and is now on a 5-year replacement cycle


Cummins 5.9 with Hurth gear
bshanafelt is offline   Reply With Quote
Old 03-08-2014, 08:19 PM   #8
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 4,820
Regarding tranmission coolers, if they don't have a pencil zinc, then they have a shorter life than you might think. The cooler deteriorates in the same way as the engine's heat exchanger would if you don't change that zinc. When the transmission cooler went on my charter boat several years ago, after examining the failure and lack of a zinc, I rectified the problem on the new cooler. The end cap on these coolers has a spot that could be drilled and tapped for a drain plug. So I drilled and tapped it 1/8" fpt. There is now a pencil zinc in my cooler that lasts about 2 charter seasons.

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 03-09-2014, 07:40 AM   #9
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,531
it was rotted through. It was original from 1998, so I think I got my $$ worth.

For a few more bucks you can find servicible units , that just take a gasket set when ever you go inside.

Sendure among others,
FF is offline   Reply With Quote
Old 03-09-2014, 09:02 AM   #10
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 2,740
Quote:
Originally Posted by FlyWright View Post
Maybe it's time to remove the port H/E for a cleaning and refurbishment. Same for the oil coolers. How often do you guys remove and clean these units?
I remove my main heat exchanger every 2 years and flush it out at home, then paint it.
Oil and tranny coolers get pulled and replaced at 5 years.
Engine is a Ford-Lehman 120, oil and tranny coolers are identical.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 03-25-2014, 09:50 PM   #11
Member
 
City: Gold Coast
Country: Australia
Join Date: Mar 2014
Posts: 23
Take a look at TRAC Enviomentals product Barnical Buster - US made and an outstanding product for cleaning and servicing the HE insitu.

DT
Delta Tango is offline   Reply With Quote
Old 03-26-2014, 06:15 AM   #12
Guru
 
City: Port Vila
Country: Vanuatu
Join Date: Nov 2010
Posts: 628
I'm not aware of conditions where you are but calcium scale is the only real concern in my waters, we don't experience biological growth. Every thousand hours on the boats I service I remove the water injection hose, extend it onto a bilge pump in a bucket, disconnect the raw water pump outlet hose & extend this to the bucket, fill bucket with descaling acid, start pump and go and have a leisurely cup of coffee. Stop pump after 15 minutes, reconnect hoses, start engine and good to go. Now I have fittings available for all the boats I work on the whole process take less than 1/2 hour per engine for ALL the coolers on that engine.
Biological growth, unless it is actual shells stuck in tubes, can usually be taken care of by a soak and vigorous back flush with water as hot as possible. If your friend has a steam cleaner, these are ideal. Every time a cooler is removed & dismantled the potential for damage is substanitally increased.
BTW, in a properly set up and maintained cooling arrangement, seawater won't contaminate other fluids. The pressure of the fluids being cooled will alwys be higher than the raw water pressure so will leak out into the raw water discharge.
Nightcap is offline   Reply With Quote
Old 03-28-2014, 10:24 PM   #13
Member
 
City: Ballard
Country: USA
Vessel Model: 1984 Krogen Manatee
Join Date: Mar 2014
Posts: 13
Quote:
Originally Posted by Nightcap View Post
I'm not aware of conditions where you are but calcium scale is the only real concern in my waters, we don't experience biological growth. Every thousand hours on the boats I service I remove the water injection hose, extend it onto a bilge pump in a bucket, disconnect the raw water pump outlet hose & extend this to the bucket, fill bucket with descaling acid, start pump and go and have a leisurely cup of coffee. Stop pump after 15 minutes, reconnect hoses, start engine and good to go. Now I have fittings available for all the boats I work on the whole process take less than 1/2 hour per engine for ALL the coolers on that engine.
Biological growth, unless it is actual shells stuck in tubes, can usually be taken care of by a soak and vigorous back flush with water as hot as possible. If your friend has a steam cleaner, these are ideal. Every time a cooler is removed & dismantled the potential for damage is substanitally increased.
BTW, in a properly set up and maintained cooling arrangement, seawater won't contaminate other fluids. The pressure of the fluids being cooled will alwys be higher than the raw water pressure so will leak out into the raw water discharge.
Just to clarify: The water injection hose-Is this the hose that connects to the exhaust elbow? Also are you using muratic acid as a descaler?
Mac2 is offline   Reply With Quote
Old 03-29-2014, 12:11 AM   #14
Guru
 
City: Port Vila
Country: Vanuatu
Join Date: Nov 2010
Posts: 628
Yes, the hose to the exhaust elbow. You basically want to make a loop of the entire engine cooling system and circulate through it. If god was good I would be able to use muriatic but Vanuatu is a bit short on this sort of thing & I don't have an import licence for dangerous goods. I use 12.5% hydrochloric and pray to the descaling gods throughout the process. Touch wood I haven't damaged a cooler yet but Cummins 6BTA air coolers make me nervous.
Nightcap is offline   Reply With Quote
Old 03-30-2014, 10:33 PM   #15
Veteran Member
 
jstauffer's Avatar
 
City: Poulsbo, WA
Country: USA
Vessel Name: Serenus
Vessel Model: Tollycraft 44
Join Date: Mar 2011
Posts: 74
I just replaced the transmission oil coolers on my boat and the new ones, besides having zinc's, also have a terminal to ground the cooler to the engine. My old ones did not nor do my engine HX. The engine HX do have a pretty good mechanical connection to the engine where as the transmission cooler not so much. Any thoughts?
__________________
Jerry & Mona Stauffer
Serenus
Liberty Bay Marina
Poulsbo, WA
jstauffer is offline   Reply With Quote
Old 03-31-2014, 08:10 AM   #16
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,920
Quote:
Originally Posted by jstauffer View Post
I just replaced the transmission oil coolers on my boat and the new ones, besides having zinc's, also have a terminal to ground the cooler to the engine. My old ones did not nor do my engine HX. The engine HX do have a pretty good mechanical connection to the engine where as the transmission cooler not so much. Any thoughts?
Bonding when working properly is great...

Bonding when you have stray current corrosion is a nightmare....

If all of the coolers/HXers are metal strapped to the engine and have zero resistance or continuity between them then the terminal is unnecessary (but ultimately an easier bond to keep corrosion free).

Roll the dice...
psneeld is offline   Reply With Quote
Old 03-31-2014, 12:31 PM   #17
Member
 
City: Mariehamn
Country: Aaland Islands (Finland)
Vessel Name: Chesapeake Lady
Vessel Model: Mainship II 34
Join Date: Jun 2013
Posts: 21
Just take the coolers apart and go to a work shop with an ultrasonic cleanig machine 30-60 min then its like new again!
__________________

Mike1973 is offline   Reply With Quote
Reply

Thread Tools
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 09:41 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012