Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-15-2018, 12:06 PM   #1
Senior Member
 
City: Seattle
Country: USA
Vessel Name: Conundrum
Vessel Model: Nordlund 63' Pilothouse
Join Date: Feb 2017
Posts: 112
Pencil zinc rage

Checked pencil zincs this past weekend. Snapped two (picture attached). Any tips for:

1. Removing the zinc that is precariously holding on for dear life?
2. Loosening the zinc prior to attempting to loosen the brass cap? WD40?

Ideas I've researched so far are everything from pushing it in and not worrying about it... pushing it in then tearing apart the heat exchanger to remove it...or try to remove it carefully without dropping it into the exchanger with 1) reverse drilling or 2) superglue something to the top of the remaining portion and pull it out.

TIA
-tozz
Attached Thumbnails
Click image for larger version

Name:	snapped_zinc.jpeg
Views:	90
Size:	62.0 KB
ID:	76329  
__________________
Advertisement

tozz is offline   Reply With Quote
Old 05-15-2018, 12:18 PM   #2
Senior Member
 
GoneFarrell's Avatar
 
City: La Conner, WA
Country: United States
Vessel Name: Imagine
Vessel Model: Farrell 34
Join Date: Oct 2015
Posts: 269
Maybe you can remove the line & fitting shown in the pic, reach in with a tool or bent bar and nudge the little bugger back out.

Annoying for sure, I've had a few old ones do that. They lay in the bottom of the end cap until I go in there and do a clean out. Likely the OD of the zinc has grown a bit larger with zinc corrosion products, making it tough to pull out.

Tough place to glue. I'd try JB Kwik Weld on end of a chopstick; its more viscous, less chance of running downhill and gluing the zinc into position. Let it set up a bit on the end of the stick first.
__________________

GoneFarrell is offline   Reply With Quote
Old 05-15-2018, 12:20 PM   #3
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,731
We had the same problem with the heat exchanger zincs breaking/wearing off. When we changed to aluminum anodes, we also changed the one on our heat exchanger to ones manufactured by Peformance Metals. They have a wire core and so far I havenít have any break off when they get changed.
Attached Thumbnails
Click image for larger version

Name:	6A19E220-2011-4581-A7BA-39B9DE1B8510.jpg
Views:	77
Size:	69.2 KB
ID:	76330  
Larry M is online now   Reply With Quote
Old 05-15-2018, 12:42 PM   #4
Senior Member
 
City: Seattle
Country: USA
Vessel Name: Conundrum
Vessel Model: Nordlund 63' Pilothouse
Join Date: Feb 2017
Posts: 112
Quote:
Originally Posted by GoneFarrell View Post
Maybe you can remove the line & fitting shown in the pic, reach in with a tool or bent bar and nudge the little bugger back out.

Annoying for sure, I've had a few old ones do that. They lay in the bottom of the end cap until I go in there and do a clean out. Likely the OD of the zinc has grown a bit larger with zinc corrosion products, making it tough to pull out.

Tough place to glue. I'd try JB Kwik Weld on end of a chopstick; its more viscous, less chance of running downhill and gluing the zinc into position. Let it set up a bit on the end of the stick first.
Thanks for the reply. I'm hoping that if it drops in I can wait until I do a whole system cleanout to retrieve and it won't restrict flow do badly.
tozz is offline   Reply With Quote
Old 05-15-2018, 12:43 PM   #5
Senior Member
 
City: Seattle
Country: USA
Vessel Name: Conundrum
Vessel Model: Nordlund 63' Pilothouse
Join Date: Feb 2017
Posts: 112
Quote:
Originally Posted by Larry M View Post
We had the same problem with the heat exchanger zincs breaking/wearing off. When we changed to aluminum anodes, we also changed the one on our heat exchanger to ones manufactured by Peformance Metals. They have a wire core and so far I havenít have any break off when they get changed.
Thanks, as soon as I get these out i'm moving to better engineered zincs like the ones you show here. It's worth the extra money to not have to deal with this.
tozz is offline   Reply With Quote
Old 05-15-2018, 02:10 PM   #6
Guru
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 526
Whenever I remove a zinc, i always assume that it will have a coating of crud that could cause it to snap off.
The solution is to break it loose, then turn it back a bit, loosen it just a bit further,, then tighten it back, etc, hopefully breaking off the buildup gently as it is removed, rather than just forcing it right off.
It’s a good idea to measure your new zincs length before it’s installed, some 5hat I’ve used for my Cummins B are too long, and had to be trimmed prior to installation.
__________________
You can lead a horse to water,
But you can't make him ski...
kapnd is offline   Reply With Quote
Old 05-15-2018, 02:32 PM   #7
Guru
 
djmarchand's Avatar
 
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23
Join Date: Aug 2012
Posts: 4,645
Not sure what engine you have. From the white paint it looks like a Cummins.

That blue hose and fitting probably doesn't go to the water side as it looks like a transmission oil hose. But that doesn't look like a transmission oil cooler.

But in any case, you can probably remove the end cap and get to the zinc that has fallen off. Depends on what heat exchanger it is and where. Drilling it for an easy out might work.

Once you get it off, here are a few suggestions:

1. Replace your zincs sooner so that they have enough beef left to withstand removal without breaking off.
2. Paint a circle of nail polish around the threads and shoulder of the new zinc. That will prevent it from wasting and should leave enough metal so it won't stay behind.
3. Yours broke off, but many just unscrew. Tighten them up with pliers before installing.

Don't just leave it. It looks like it needs to come out to put a new zinc in place.

David
djmarchand is offline   Reply With Quote
Old 05-15-2018, 02:48 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: 7,312
Quote:
Originally Posted by Larry M View Post
We had the same problem with the heat exchanger zincs breaking/wearing off. When we changed to aluminum anodes, we also changed the one on our heat exchanger to ones manufactured by Peformance Metals. They have a wire core and so far I havenít have any break off when they get changed.
+1 for Performance Metals aluminum anodes. No more pencil zincs that can unscrew on my boat!

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 05-15-2018, 05:46 PM   #9
Guru
 
OldDan1943's Avatar
 
City: Aventura FL
Country: USA
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 3,503
Are aluminum anodes 'fit' for saltwater usage?
Do the aluminum anodes provide the same level of protection as zinc anodes?
__________________
I will update this as soon as I can think of something snappy.
OldDan1943 is online now   Reply With Quote
Old 05-15-2018, 05:59 PM   #10
Guru
 
menzies's Avatar
 
City: Jacksonville
Country: USA
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 4,073
If the break is past the threads can you not just have someone briefly start the engine and let it blow out?
menzies is online now   Reply With Quote
Old 05-15-2018, 08:34 PM   #11
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 4,552
Yes you can use aluminum in either salt or fresh water.
Comodave is online now   Reply With Quote
Old 05-15-2018, 08:58 PM   #12
Guru
 
OldDan1943's Avatar
 
City: Aventura FL
Country: USA
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 3,503
Quote:
Originally Posted by Comodave View Post
Yes you can use aluminum in either salt or fresh water.
Got a name of a supplier?
__________________
I will update this as soon as I can think of something snappy.
OldDan1943 is online now   Reply With Quote
Old 05-15-2018, 10:12 PM   #13
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 4,552
I get most of my anodes from Boatzincs.com. I think that I am using magnesium engine anodes. The aluminum were not available in my size.
Comodave is online now   Reply With Quote
Old 05-15-2018, 10:32 PM   #14
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: 7,312
Go to performancemetals.com/collections/pencil-anodes , figure out what you want.
Call go2marine.com and they will special order them for you. Performance Metals is a division of a Canadian anode manufacturer. Go2marine was good price wise when I ordered them in 2017.

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 05-16-2018, 09:13 AM   #15
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,731
Quote:
Originally Posted by Comodave View Post
Yes you can use aluminum in either salt or fresh water.
Yup! An article from Cruising World by Steve DíAntonio

https://www.cruisingworld.com/how/zi...-anodes#page-2

This is from Boating Magazine.
Attached Thumbnails
Click image for larger version

Name:	3DDC7516-986C-4131-B474-7B38843F0D34.jpeg
Views:	40
Size:	46.6 KB
ID:	76360  
Larry M is online now   Reply With Quote
Old 05-16-2018, 09:56 AM   #16
Guru
 
City: gulf coast
Country: pinellas
Join Date: Jun 2014
Posts: 2,744
Mine often unscrewed from the brass regardless of how well I tightened them.

Removing a stuck but unscrewed zinc was easy with am all thread connecting nut. Simply screw it onto the zinc and wiggle it loose.
bayview is offline   Reply With Quote
Old 05-16-2018, 03:56 PM   #17
TF Site Team
 
City: Westerly, RI
Country: USA
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 1,668
Quote:
Originally Posted by djmarchand View Post

Paint a circle of nail polish around the threads and shoulder of the new zinc. That will prevent it from wasting and should leave enough metal so it won't stay behind.
From what I've read, it is not recommended to use teflon tape on the threads, because that is isolating the zinc from the device it's installed in and effectively preventing it from working. It would seem that painting the threads would do the same thing. I suspect that less zinc wastes away because it is not actually doing its job.

Is the circle on the threads small enough that it is only reducing the effectiveness by a smaller amount because only a small portion of the threads are isolated??
Shrew is offline   Reply With Quote
Old 05-16-2018, 04:33 PM   #18
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,136
I have broken them too, I just push them in, they will just finish rotting away inside. Maybe you can enlarge the opening where the zinc passes through?
__________________

sdowney717 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 05:44 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012