Re: Fwd: Coolant leak - on an early NT26 ?
Good morning, wanted to send an update to this thread!
We found it was due to a weak impellar that wasnt pumping enough water at higher RPMs and was causing the engine to overheat and vent out of the cap.
Solution was to remove and replace the impellar. Thank you all for the helpful advice!
Trent and Nancy
Puffin
On Sunday, December 10, 2023 at 10:19:09 PM EST, Brian via Sentoa <sentoa@lists.sentoa.org> wrote:
One further place to check is the hot water tank hose connection in addition to the heater hose. We have a 1983 NT 26, Perkins 4.236 and cruise out of Blind River, Ontario.
Brian Stewart
Land locked In Toronto
Tuglet, NT 26 #080 1983
bgs@pilgrimspassages.com
www.pilgrimspassages.com
On Dec 10, 2023, at 15:51, Nancy Taylor via Sentoa <sentoa@lists.sentoa.org> wrote:
Hello I am so sorry for not including it was NT26, Perkins 4.236 85Hp and it is a 26' 1984 nordic tug. I can't seem to log in or see how I can update that to the thread :-(
----- Forwarded Message -----
From: Nancy Taylor via Sentoa <sentoa@lists.sentoa.org>
To: sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>; Kelly Britz <kelbritz@hotmail.com>; Fog Cutter Maritime <fogillin@gmail.com>; Eric Swanson <eswanson23@hotmail.com>; dwowen@cox.net <dwowen@cox.net>
Cc: Nancy Taylor <nmtaylor1@yahoo.com>
Sent: Sunday, December 10, 2023 at 03:13:28 PM EST
Subject: [Sentoa] Re: Coolant leak - on an early NT26 ?
Hello David, Fog Cutter, Eric, Kelly and SENTOA,
Thank you ALL for the helpful suggestions. Yes this is indeed Puffin in FL. Trent is going out of town next week and will be researching more when he is out of town.
I can tell you that the compartment was clean as in there was no mess anywhere. No visible spray or gushing. And it is hard to tell how much is down there. He added a little more coolant today, but it disappeared and hard to say if it is in the tubes as it was so empty. A bit embarassing to be towed past those having their Christmas parties last night, but at least all was safe. We hope its just a simple fix such as a tube or hose coming loose. This could have also been a slow leak that went on undetected for some time. But I know Trent is in the habit of checking inside the engine compartment when we start up and before we even leave the dock. Leads me to think this was a sudden loss of coolant. Thank you so much for all your suggestions, we have a lot of researching to do!
Nancy & Trent
On Sunday, December 10, 2023 at 02:22:42 PM EST, Kelly Britz <kelbritz@hotmail.com> wrote:
Might there be any DIY wisdom for early NT26's out there to support Nancy & Trent's coolant troubleshooting efforts? From the most recent fleet listing, looks like they are probably PUFFIN NT26-092, home ported in Florida.
Nancy & Trent: sincerely hope you're making progress - if the over-temp alarm went off, sure hope you haven't got a gusher - best of luck and hope all's OK with your engine once you sort it all out. Please report back with what you found.
Postscript here for the SENTOA archive for tracing annoyingly 'small' coolant leaks that evaporate before pooling in the bilge.
We have found slow coolant leaks tend to leave a faint white 'snail trail' deposit on the castings/hoses at the source of the leak. Takes diligence and a bit of gymnastics with a bright hand light to inspect the underside of everything and everywhere errant coolant might drip from. Finding a white snail trail on white engine paint does contribute to the challenge. Making a black marker line across a suspect 'trail' then checking later has helped me confirm the sneaky culprit.
Specific to tracing coolant leaks for a Cummins 6BTA, now with north of 10K engine hours, we've had our share. The turbo connection at the rear of the exhaust manifold is notorious for slow coolant leaks. This engine has a second optional turbo mount dead center on the top of that manifold using that big 6" square cap. Both locations use the same gasket and both have leaked on our boat. On the 6BTA, all the most likely coolant leaks are on the starboard side of the engine. The 5/8" coolant hose that loops forward to the heater/defroster unit beneath the stateroom steps then aft through the bilge to the domestic water heater before returning to the engine both originate and terminate on the forward-starboard corner of the 6BTA, top and bottom respectively (if you're going to replace this hose, take the time for find authentic Gates "green-stripe" hose, you don't want to do this job ever again!). For insurance, we installed mini SS ¼ turn ball-valve shut-offs on both inlet and outlet connections for this coolant loop (search SENTOA archives). Leaks from the coolant pump are sneakier. Everything is hidden behind the serpentine belt shroud. Leaving a paper towel beneath the shroud in the bilge pointed out the pump's shaft seal was the source, the usual bilge absorption pads just sucked it up without a mark but the paper towel left a telltail colored spot. FYI, coolant pumps for the Dodge RAM version of this engine were 1/10th the cost from Cummin$ and aftermarket has now lasted longer than the original.
kind regards, Kelly Britz, SANDPIPER NT37-042, Edmonds/Seattle
From: Nancy M. Taylor via Sentoa <sentoa@lists.sentoa.org>
Sent: Saturday, December 9, 2023 9:22 PM
To: sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>
Cc: Nancy M. Taylor <nmtaylor1@yahoo.com>
Subject: [Sentoa] Coolant leakWhile underway tonight, our engine temp buzzer came on. We shut down the engine immediately, opened engine compartment and noticed all the radiator fluid was pooled on the bottom of the hull. Anyone experience this or have any ideas on where to start troubleshooting?
Thank you,
Nancy and TrentSent from my iPhone
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Hi Trent & Nancy
wow, what a sneaky problem to troubleshoot if you can't watch it happen and especially only at high RPM.
Thanks for posting the follow up - great stuff!
regards, Kelly, Sandpiper, Seattle NT37-042
From: Nancy Taylor via Sentoa sentoa@lists.sentoa.org
Sent: Saturday, January 6, 2024 12:08 PM
To: South East Nordic Tugs Owners' Association (SENTOA) sentoa@lists.sentoa.org
Cc: Nancy Taylor nmtaylor1@yahoo.com
Subject: [Sentoa] Re: Fwd: Coolant leak - on an early NT26 ?
Good morning, wanted to send an update to this thread!
We found it was due to a weak impellar that wasnt pumping enough water at higher RPMs and was causing the engine to overheat and vent out of the cap.
Solution was to remove and replace the impellar. Thank you all for the helpful advice!
Trent and Nancy
Puffin
On Sunday, December 10, 2023 at 10:19:09 PM EST, Brian via Sentoa sentoa@lists.sentoa.org wrote:
One further place to check is the hot water tank hose connection in addition to the heater hose. We have a 1983 NT 26, Perkins 4.236 and cruise out of Blind River, Ontario.
Brian Stewart
Land locked In Toronto
Tuglet, NT 26 #080 1983
bgs@pilgrimspassages.commailto:bgs@pilgrimspassages.com
www.pilgrimspassages.com
On Dec 10, 2023, at 15:51, Nancy Taylor via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
Hello I am so sorry for not including it was NT26, Perkins 4.236 85Hp and it is a 26' 1984 nordic tug. I can't seem to log in or see how I can update that to the thread :-(
----- Forwarded Message -----
From: Nancy Taylor via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
To: sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>; Kelly Britz <kelbritz@hotmail.commailto:kelbritz@hotmail.com>; Fog Cutter Maritime <fogillin@gmail.commailto:fogillin@gmail.com>; Eric Swanson <eswanson23@hotmail.commailto:eswanson23@hotmail.com>; dwowen@cox.netmailto:dwowen@cox.net <dwowen@cox.netmailto:dwowen@cox.net>
Cc: Nancy Taylor <nmtaylor1@yahoo.commailto:nmtaylor1@yahoo.com>
Sent: Sunday, December 10, 2023 at 03:13:28 PM EST
Subject: [Sentoa] Re: Coolant leak - on an early NT26 ?
Hello David, Fog Cutter, Eric, Kelly and SENTOA,
Thank you ALL for the helpful suggestions. Yes this is indeed Puffin in FL. Trent is going out of town next week and will be researching more when he is out of town.
I can tell you that the compartment was clean as in there was no mess anywhere. No visible spray or gushing. And it is hard to tell how much is down there. He added a little more coolant today, but it disappeared and hard to say if it is in the tubes as it was so empty. A bit embarassing to be towed past those having their Christmas parties last night, but at least all was safe. We hope its just a simple fix such as a tube or hose coming loose. This could have also been a slow leak that went on undetected for some time. But I know Trent is in the habit of checking inside the engine compartment when we start up and before we even leave the dock. Leads me to think this was a sudden loss of coolant. Thank you so much for all your suggestions, we have a lot of researching to do!
Nancy & Trent
On Sunday, December 10, 2023 at 02:22:42 PM EST, Kelly Britz <kelbritz@hotmail.commailto:kelbritz@hotmail.com> wrote:
Might there be any DIY wisdom for early NT26's out there to support Nancy & Trent's coolant troubleshooting efforts? From the most recent fleet listing, looks like they are probably PUFFIN NT26-092, home ported in Florida.
Nancy & Trent: sincerely hope you're making progress - if the over-temp alarm went off, sure hope you haven't got a gusher - best of luck and hope all's OK with your engine once you sort it all out. Please report back with what you found.
Postscript here for the SENTOA archive for tracing annoyingly 'small' coolant leaks that evaporate before pooling in the bilge.
We have found slow coolant leaks tend to leave a faint white 'snail trail' deposit on the castings/hoses at the source of the leak. Takes diligence and a bit of gymnastics with a bright hand light to inspect the underside of everything and everywhere errant coolant might drip from. Finding a white snail trail on white engine paint does contribute to the challenge. Making a black marker line across a suspect 'trail' then checking later has helped me confirm the sneaky culprit.
Specific to tracing coolant leaks for a Cummins 6BTA, now with north of 10K engine hours, we've had our share. The turbo connection at the rear of the exhaust manifold is notorious for slow coolant leaks. This engine has a second optional turbo mount dead center on the top of that manifold using that big 6" square cap. Both locations use the same gasket and both have leaked on our boat. On the 6BTA, all the most likely coolant leaks are on the starboard side of the engine. The 5/8" coolant hose that loops forward to the heater/defroster unit beneath the stateroom steps then aft through the bilge to the domestic water heater before returning to the engine both originate and terminate on the forward-starboard corner of the 6BTA, top and bottom respectively (if you're going to replace this hose, take the time for find authentic Gates "green-stripe" hose, you don't want to do this job ever again!). For insurance, we installed mini SS ¼ turn ball-valve shut-offs on both inlet and outlet connections for this coolant loop (search SENTOA archives). Leaks from the coolant pump are sneakier. Everything is hidden behind the serpentine belt shroud. Leaving a paper towel beneath the shroud in the bilge pointed out the pump's shaft seal was the source, the usual bilge absorption pads just sucked it up without a mark but the paper towel left a telltail colored spot. FYI, coolant pumps for the Dodge RAM version of this engine were 1/10th the cost from Cummin$ and aftermarket has now lasted longer than the original.
kind regards, Kelly Britz, SANDPIPER NT37-042, Edmonds/Seattle
From: Nancy M. Taylor via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Sent: Saturday, December 9, 2023 9:22 PM
To: sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Nancy M. Taylor <nmtaylor1@yahoo.commailto:nmtaylor1@yahoo.com>
Subject: [Sentoa] Coolant leak
While underway tonight, our engine temp buzzer came on. We shut down the engine immediately, opened engine compartment and noticed all the radiator fluid was pooled on the bottom of the hull. Anyone experience this or have any ideas on where to start troubleshooting?
Thank you,
Nancy and Trent
Sent from my iPhone
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To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org
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Sent from Dan's iPhone. My seawater pump did not leak whenever the engine was running. However it would leak when the engine was NOT running. Just a steady drip …..drip…drip. I wanted to have the pump replaced No such luck. My NT 26 Gammel Dansk is powered by a 4cylinder Peugeot Lehman. The seawater pump is made by Johnson pumps. American Diesel specializes in the Ford Lehman marine diesels. I spoke to them and after they finished laughing they signed off with Have fun searching the globe for that brand seawater pump. The Johnson pumps have not been manufactured for 25 years. The pump is not available through Peugeot got. I was open to a parts run to Paris. I did find a company in Florida that had a service kit for the pump. Part of the problem was a leak ant the front of impeller shaft. The kit included a disc that sealed the leak at the shaft. After reassembly and installation of the kit. NO leak. The downside was the price of $250. But was it worth it Yes,Yes and Yes.
Dan Stroeing
Nordic Tug Gammel Dansk (Old Dane) NT26 Hull #50.
Gammel Dansk Loop Travel Blog www.danmarygammeldansk.blogspot.com
On Jan 6, 2024, at 4:32 PM, Kelly Britz via Sentoa <sentoa@lists.sentoa.org> wrote:
Hi Trent & Nancy
wow, what a sneaky problem to troubleshoot if you can't watch it happen and especially only at high RPM.
Thanks for posting the follow up - great stuff!
regards, Kelly, Sandpiper, Seattle NT37-042
From: Nancy Taylor via Sentoa <sentoa@lists.sentoa.org>
Sent: Saturday, January 6, 2024 12:08 PM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: Nancy Taylor <nmtaylor1@yahoo.com>
Subject: [Sentoa] Re: Fwd: Coolant leak - on an early NT26 ?
Good morning, wanted to send an update to this thread!
We found it was due to a weak impellar that wasnt pumping enough water at higher RPMs and was causing the engine to overheat and vent out of the cap.
Solution was to remove and replace the impellar. Thank you all for the helpful advice!
Trent and Nancy
Puffin
On Sunday, December 10, 2023 at 10:19:09 PM EST, Brian via Sentoa <sentoa@lists.sentoa.org> wrote:
One further place to check is the hot water tank hose connection in addition to the heater hose. We have a 1983 NT 26, Perkins 4.236 and cruise out of Blind River, Ontario.
Brian Stewart
Land locked In Toronto
Tuglet, NT 26 #080 1983
bgs@pilgrimspassages.com
www.pilgrimspassages.comOn Dec 10, 2023, at 15:51, Nancy Taylor via Sentoa <sentoa@lists.sentoa.org> wrote:
Hello I am so sorry for not including it was NT26, Perkins 4.236 85Hp and it is a 26' 1984 nordic tug. I can't seem to log in or see how I can update that to the thread :-(
----- Forwarded Message -----
From: Nancy Taylor via Sentoa <sentoa@lists.sentoa.org>
To:sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>; Kelly Britz <kelbritz@hotmail.com>; Fog Cutter Maritime <fogillin@gmail.com>; Eric Swanson <eswanson23@hotmail.com>; dwowen@cox.net <dwowen@cox.net>
Cc: Nancy Taylor <nmtaylor1@yahoo.com>
Sent: Sunday, December 10, 2023 at 03:13:28 PM EST
Subject: [Sentoa] Re: Coolant leak - on an early NT26 ?
Hello David, Fog Cutter, Eric, Kelly and SENTOA,
Thank you ALL for the helpful suggestions. Yes this is indeed Puffin in FL. Trent is going out of town next week and will be researching more when he is out of town.
I can tell you that the compartment was clean as in there was no mess anywhere. No visible spray or gushing. And it is hard to tell how much is down there. He added a little more coolant today, but it disappeared and hard to say if it is in the tubes as it was so empty. A bit embarassing to be towed past those having their Christmas parties last night, but at least all was safe. We hope its just a simple fix such as a tube or hose coming loose. This could have also been a slow leak that went on undetected for some time. But I know Trent is in the habit of checking inside the engine compartment when we start up and before we even leave the dock. Leads me to think this was a sudden loss of coolant. Thank you so much for all your suggestions, we have a lot of researching to do!
Nancy & Trent
On Sunday, December 10, 2023 at 02:22:42 PM EST, Kelly Britz <kelbritz@hotmail.com> wrote:
Might there be any DIY wisdom for early NT26's out there to support Nancy & Trent's coolant troubleshooting efforts? From the most recent fleet listing, looks like they are probably PUFFIN NT26-092, home ported in Florida.
Nancy & Trent: sincerely hope you're making progress - if the over-temp alarm went off, sure hope you haven't got a gusher - best of luck and hope all's OK with your engine once you sort it all out. Please report back with what you found.
Postscript here for the SENTOA archive for tracing annoyingly 'small' coolant leaks that evaporate before pooling in the bilge.
We have found slow coolant leaks tend to leave a faint white 'snail trail' deposit on the castings/hoses at the source of the leak. Takes diligence and a bit of gymnastics with a bright hand light to inspect the underside of everything and everywhere errant coolant might drip from. Finding a white snail trail on white engine paint does contribute to the challenge. Making a black marker line across a suspect 'trail' then checking later has helped me confirm the sneaky culprit.
Specific to tracing coolant leaks for a Cummins 6BTA, now with north of 10K engine hours, we've had our share. The turbo connection at the rear of the exhaust manifold is notorious for slow coolant leaks. This engine has a second optional turbo mount dead center on the top of that manifold using that big 6" square cap. Both locations use the same gasket and both have leaked on our boat. On the 6BTA, all the most likely coolant leaks are on the starboard side of the engine. The 5/8" coolant hose that loops forward to the heater/defroster unit beneath the stateroom steps then aft through the bilge to the domestic water heater before returning to the engine both originate and terminate on the forward-starboard corner of the 6BTA, top and bottom respectively (if you're going to replace this hose, take the time for find authentic Gates "green-stripe" hose, you don't want to do this job ever again!). For insurance, we installed mini SS ¼ turn ball-valve shut-offs on both inlet and outlet connections for this coolant loop (search SENTOA archives). Leaks from the coolant pump are sneakier. Everything is hidden behind the serpentine belt shroud. Leaving a paper towel beneath the shroud in the bilge pointed out the pump's shaft seal was the source, the usual bilge absorption pads just sucked it up without a mark but the paper towel left a telltail colored spot. FYI, coolant pumps for the Dodge RAM version of this engine were 1/10th the cost from Cummin$ and aftermarket has now lasted longer than the original.
kind regards, Kelly Britz, SANDPIPER NT37-042, Edmonds/Seattle
From: Nancy M. Taylor via Sentoa <sentoa@lists.sentoa.org>
Sent: Saturday, December 9, 2023 9:22 PM
To: sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>
Cc: Nancy M. Taylor <nmtaylor1@yahoo.com>
Subject: [Sentoa] Coolant leakWhile underway tonight, our engine temp buzzer came on. We shut down the engine immediately, opened engine compartment and noticed all the radiator fluid was pooled on the bottom of the hull. Anyone experience this or have any ideas on where to start troubleshooting?
Thank you,
Nancy and TrentSent from my iPhone
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org
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To unsubscribe send an email to sentoa-leave@lists.sentoa.org
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The Johnson pumps have not been manufactured for 25 years.
There must be some misunderstanding here. Johnson pumps are still manufactured and they are a major supplier to the marine industry. I bought a genuine Johnson impeller pump for my previous boat not too long ago.
The specific model you needed may be obsolete, but not Johnson pumps overall.
Gene Fuller
Yorkshire Rose
NT 37-136
Punta Gorda, FL