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carver
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- CYO Supporter
- Posts: 5812
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Coolant Loss Mystery
BTW, tranny coolers is raw water cooled, no coolant present.
- SanJuanDreamer
- First Mate
- Posts: 170
- Joined: April 4th, 2016, 4:02 pm
- Vessel Info: Still Searching
- Location: Seattle
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Re: Coolant Loss Mystery
- SanJuanDreamer
- First Mate
- Posts: 170
- Joined: April 4th, 2016, 4:02 pm
- Vessel Info: Still Searching
- Location: Seattle
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Re: Coolant Loss Mystery
- jcoll
- Deck Hand
- Posts: 95
- Joined: September 10th, 2014, 12:18 am
- Vessel Info: 1998 355 Motor yacht
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Re: Coolant Loss Mystery
www.crusaderengines.com/wp-content/uplo ... 001-09.pdf
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
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Re: Coolant Loss Mystery
I 'thought' that I was losing coolant as well. I would fill up the reservoir and cruise around at 3200RPM for a couple of hours. There is a noticeable amount of 'steam' coming out of the exhaust at cruise speed.
The next day I would check the reservoir and it would seem empty. I would proceed to fill. I am thinking that the coolant is leaking somewhere and burning off. Same symptoms and possible remedies as outlined by the folks on this string.
I was ready to do a pressure test.
Then I noticed that the coolant reservoir has 3 'compartments' in them. (this is my first experience with this style reservoir...my previous boat was 1989 carb stye engines).
The 'aft' compartment has the flow line leading down to the engine. The 'forward' compartment has the overflow line.
I realized that I would keep filling all the compartments viewing the coolant through the translucent tank. I would stop filling when it was completely dark with fluid.
I then realized that the aft compartment already had coolant. I was simply overfilling each time and it was exiting out the forward overflow line. Simple answer for my inexperience with the engines.
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- CYO Supporter
- Posts: 5812
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 432 times
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Re: Coolant Loss Mystery
nautiyachti wrote:Source of the post .....what does engine coolant loss have to do with my transmissions. they aren't part of the same system are they?...
Nothing to do with transmissions, no coolant through the cooler, not part of the closed cooling system.
- km1125
- Admiral
- Posts: 3348
- Joined: February 28th, 2017, 6:04 pm
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Re: Coolant Loss Mystery
Unless you diengage the raw water pump, you don't want to run the engine very long out of the water. If you disengage the raw water pump, you don't want to run it too long or your exhaust is going to get way too hot. If you are feeding it with cooling water, then you're not going to notice much difference coming out the exhaust.
- bud37
- Admiral
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Re: Coolant Loss Mystery
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- CYO Supporter
- Posts: 5812
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 432 times
- Been thanked: 1588 times
Re: Coolant Loss Mystery
nautiyachti wrote:Source of the post...if I top up the coolant, run the engine and can see coolant coming out of the exhaust, does that tell me if this issue is from a cracked heat exchanger or ??
It can but as mentioned above, it could be from other sources as well so all it will do is confirm that you're losing coolant out the exhaust which you already know or it would be in your bilge or oil pan. You'd likely also need to run it for a while as mentioned which I wouldn't want to do for very long nor would I need to since doing a simple test by pressurizing the system in place would likely reveal the source of the leak. Get them to do it when it's on land, it affords a couple of more options for leak detection that you can't see while in the water such as out the exhaust port or dripless shaft logs without the engine running.
Make sure you test the coolant in your block come winterizing time! Don't add coolant after haul out then simply test the coolant at winterizing time in your heat exchanger, all you'd be doing is testing the coolant you just poured in the exchanger.
- bud37
- Admiral
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Re: Coolant Loss Mystery
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