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02-02-2014, 04:33 PM
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#1
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Member
City: Millbrae
Join Date: Jan 2014
Posts: 7
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Coolant loss
We have a 1974 G.B. with a John Deer Ammera 404. After running the engine the coolant go down after awhile. No coolant in the hull, or the oil. Put food color in the coolant system to see if was going into the sea water, but none in sight. Put a pressure tester on the system and the pressure goes down after awhile. Next we will put dye in the cooling system and check with a ultra violent light to see if there is any trace in the seawater. Then pull the side cover from the heat exchanger and check for traces of dye in there. Any ideas? Thanks, Ed.
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02-02-2014, 05:39 PM
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#2
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Guru
City: Stuart FL
Vessel Name: Lucky Lucky
Vessel Model: Pacific Mariner 65
Join Date: Aug 2013
Posts: 2,760
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Make sure the coolant fill cap is sealing properly. Be sure the rim on the fill is clean. Be sure the cap is the correct one/pressure rating. Good luck.
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02-02-2014, 05:44 PM
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#3
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Dauntless Award
City: Wrangell, Alaska
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,820
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Quote:
Originally Posted by Speced
We have a 1974 G.B. with a John Deer Ammera 404. After running the engine the coolant go down after awhile. No coolant in the hull, or the oil. Put food color in the coolant system to see if was going into the sea water, but none in sight. Put a pressure tester on the system and the pressure goes down after awhile. Next we will put dye in the cooling system and check with a ultra violent light to see if there is any trace in the seawater. Then pull the side cover from the heat exchanger and check for traces of dye in there. Any ideas? Thanks, Ed.
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Sorry to say it sounds like your head gasket. That's the only place it could go (being combusted) so that you see no trace.
Do a compression check.
Good Luck
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02-02-2014, 05:51 PM
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#4
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Guru
City: Pensacola
Join Date: May 2012
Posts: 748
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Check your exhaust. If you have a heat exchanger, it could be bad.
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02-02-2014, 05:52 PM
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#5
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Guru
City: Pensacola
Join Date: May 2012
Posts: 748
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It's not always a head gasket or cracked head problem. Start easy and work up.
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02-03-2014, 06:36 AM
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#6
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Guru
City: Vermont
Join Date: Jan 2013
Posts: 10,094
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Does it have a turbo? On some of the bigger Deeres the turbo flange gasket tends to develop leaks resulting in symptoms like you describe.
__________________
MVTanglewood.com
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02-03-2014, 09:09 AM
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#7
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Member
City: Millbrae
Join Date: Jan 2014
Posts: 7
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The cap is a new 13 pound cap. It should have between 6.5 to7.5, but no one has one. I don't think it's a head gasket because it isn't building up pressure infact it's loseing pressure. I'm going with the test for the heat exchanger and hope for the best. Thanks
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02-03-2014, 10:10 AM
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#8
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Guru
City: Cape Cod, MA
Vessel Name: Island Seeker
Vessel Model: Willard 36 Sedan
Join Date: Oct 2007
Posts: 1,306
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I hope it is just your heat exchanger and not head gasket. I don't think you would ever see dye color in exhaust water, there's just too much volume. Please get the correct pressure cap, 4 or 7 lbs, you can get them online, and do your system a favor. If you dont have an overflow reservoir, coolant will be forced out to a certain level the first time you run after filling and then stay there. this is fine and the way older engines were made to operate. Back in the day, when you checked your coolant in your car/boat, if you could touch it w/ your finger, it was fine. If you added more, it just came out the overflow and repeated addings just diluted your AF . So if you don't have an overflow tank, don't expect the coolant to remain tip top.
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02-03-2014, 10:21 AM
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#9
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Scraping Paint
City: Fort Lauderdale
Vessel Model: CHB 48 Zodiac YL 4.2
Join Date: Oct 2007
Posts: 3,804
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Quote:
Originally Posted by Brooksie
I hope it is just your heat exchanger and not head gasket. I don't think you would ever see dye color in exhaust water, there's just too much volume.
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If you use a flourescein dye, mixed well with the coolant, then pressurized for several minutes while the enigne is warm but not running, a sample drained from the raw water side of the heat exchanger should indicate a leak if one is present.
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02-03-2014, 10:41 AM
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#10
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Guru
City: Cape Cod, MA
Vessel Name: Island Seeker
Vessel Model: Willard 36 Sedan
Join Date: Oct 2007
Posts: 1,306
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Quote:
Originally Posted by RickB
If you use a flourescein dye, mixed well with the coolant, then pressurized for several minutes while the enigne is warm but not running, a sample drained from the raw water side of the heat exchanger should indicate a leak if one is present.
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Good idea. That reminds me, there is a test kit for combustion products in the coolant also.
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02-03-2014, 10:58 AM
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#11
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Member
City: Millbrae
Join Date: Jan 2014
Posts: 7
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Yes we have an recovery bottle and I have access to the dye for checking carbon in the coolent system but pressure would build up in the coolent system if a head gasket was bad. Thanks guys. Ed
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02-07-2014, 07:23 PM
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#12
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Veteran Member
City: Morehead City, NC
Vessel Name: Grande Jete`
Vessel Model: 1990 Grand Banks 46 Classic
Join Date: Jul 2010
Posts: 36
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Have you noticed any brown smoke in the exhaust when running close to WOT? Coolant in combustion can often show up as brown smoke. Just another thing to check
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02-08-2014, 05:40 AM
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#13
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Senior Member
Join Date: Nov 2010
Posts: 460
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Quote:
Originally Posted by Speced
Yes we have an recovery bottle...
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I was losing coolant as evidenced by the need to add more to my recovery bottle. Turns out the hose from the bottle to the engine had dry rotted and the coolant was dripping on the hot engine and evaporating. . Simple fix once it was discovered.
Dave
__________________
Barnegat Light NJ or Nantucket MA
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05-28-2014, 09:41 AM
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#14
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TF Site Team
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
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I'm getting coolent out the overflow on manicooler on Perkins 6.354m .The books shows two differnt size caps a 7lb and 14lb . Which cap should I get ?
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05-28-2014, 09:50 AM
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#15
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Senior Member
Vessel Name: " Supertramp "
Vessel Model: Marine Trader Widebody 50 feet
Join Date: Sep 2008
Posts: 150
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Quote:
Originally Posted by Speced
We have a 1974 G.B. with a John Deer Ammera 404. After running the engine the coolant go down after awhile. No coolant in the hull, or the oil. Put food color in the coolant system to see if was going into the sea water, but none in sight. Put a pressure tester on the system and the pressure goes down after awhile. Next we will put dye in the cooling system and check with a ultra violent light to see if there is any trace in the seawater. Then pull the side cover from the heat exchanger and check for traces of dye in there. Any ideas? Thanks, Ed.
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Check your heatexchanger ( intercooler ) and the waterheater ( when the engine heat this Waterheater and the hotwater smells ) for leaks.
_________________
Norbert
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05-28-2014, 10:14 AM
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#16
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Member
City: Millbrae
Join Date: Jan 2014
Posts: 7
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Coolent loss.
after all the testing we replaced the cap with a propper size 6# cap and after extensive boating the cap seems to have fixed the problem. Thanks one and all for all your idea's. Speced
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05-29-2014, 01:51 PM
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#17
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Guru
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,871
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Quote:
Originally Posted by Speced
after all the testing we replaced the cap with a propper size 6# cap and after extensive boating the cap seems to have fixed the problem. Thanks one and all for all your idea's. Speced
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Yep, if it worked fine and then you used the wrong cap and it started losing coolant, installing the correct cap would be the first step in troubleshooting.
Trouble shooting is simply a process of logical thinking.
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05-29-2014, 02:17 PM
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#18
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TF Site Team
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
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I positive I've got a bad cap also . I'm getting a new one today .
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05-29-2014, 06:18 PM
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#19
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Guru
City: Tuckerton, NJ
Vessel Name: WIRELESS ONE
Vessel Model: 36 Gulstar MarkII
Join Date: Mar 2011
Posts: 938
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Quote:
Originally Posted by Pack Mule
I'm getting coolent out the overflow on manicooler on Perkins 6.354m .The books shows two differnt size caps a 7lb and 14lb . Which cap should I get ?
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Different engines but my Perkins 4.154M call for 7lb caps. I have no coolant recovery bottles. The coolers have no provision for them.
I called TAD Inc to verify.
Bill
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05-29-2014, 06:19 PM
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#20
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Guru
City: Tuckerton, NJ
Vessel Name: WIRELESS ONE
Vessel Model: 36 Gulstar MarkII
Join Date: Mar 2011
Posts: 938
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Quote:
Originally Posted by rwidman
Yep, if it worked fine and then you used the wrong cap and it started losing coolant, installing the correct cap would be the first step in troubleshooting.
Trouble shooting is simply a process of logical thinking.
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Ron you don't suggest the shotgun method of troubleshooting?
Bill
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