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Go Back   SailNet Community > General Interest Forums > Gear & Maintenance
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  #11  
Old 02-05-2007
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Most antifreeze formulations have a fair amount of anti-corrosive additives in them as well. So, timely servicing of the cooling system can help prolong engine life as well.
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thanks for all the suggestions. i know how this weekend will be spent!
i ll let you know how i go. thanks again
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Old 02-06-2007
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I disagree on filling the block with 100% antifreeze. It removes heat slower than water (that is why it does not freeze). It probably does not matter in the colder climes but in Texas it does. I use a 50/50 mix.
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does it have to be diesel antifreeze or can it be automotive antifreeze?
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Old 02-07-2007
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Quote:
Originally Posted by mrkeith
does it have to be diesel antifreeze or can it be automotive antifreeze?
I don't know where you're at but me, I use automotive antifreeze, Caltex Longlife (Green) or Shell (Amber). More for antirust property than freeze.
Did you changed the luboil filter when you changed the oil ?
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I am pretty sure that antifreeze is antifreeze. Ethylene glycol is the old stuff. I don't know what the environmentally freindly stuff is.
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i m in a warm climate, it will never freeze here. yes i changed the filter along w/ the oil
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Even if you don't require the anti-freeze properties of anti-freeze, it still pays to use the good stuff and change it out regularly, since the other benefits of the use of a good antifreeze still apply—like the anti-corrosion additives, which do eventually stop working.
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Old 02-07-2007
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pigslo-
"I disagree on filling the block with 100% antifreeze. " No you don't. You are just misreading "antifreeze" to mean "pure undiluted antifreeze" (whatever that may be) as opposed to "antifreeze" meaning, as most of us do, coolant mixed as indicated on the label. Antifreeze is like coffee: You may order and drink a cup of coffee, but we both know you wouldn't touch it unless there was already water in it.

SOME antifreeze is actually sold premixed, so using it "undiluted" and "pure" will give you a 50-50 mix. Most is sold "pure", but you'd have to be nuts not to follow the instructions and mix it 50-50 (which works pretty well) or as appropriate for the temperature range and use.


The old stuff--the ethylene glycol base--is still a lot of different products. Some are incompatible with aluminum engine parts. Most have silicon silicate ("waterglass") in them or other anti-leak chemicals, which form a thin coating in the coolant passages to prevnt corrosion and leaking, but inhibit cooling. The popular antileak products can be a bad idea--unless you're leaking. The old stuff is almost always tinted green/blue.

The new "orange" stuff is more complicated. It is supposed to last much longer (doesn't break down from engine heat) but there are reports it is dissolving engine hea gaskets and wreaking other mayhem in certain systems, folks might want to search on that topic. Halvoline (Texaco), GM, and others make it and still stand by it, and many new cars are shipped with it. While facts are hard to come by, one thing they tell you up front is NEVER to mix the old and new stuff, an engine should be flushed before using the new stuff and failure to do so, leaving old contaminants, may well be the only real problem.

Then of course there's the 'pink' stuff, that's intended for R/V and summer cabin water supply lines. Non-toxic, breaks down quickly in heat, not for engines at all unless you're pouring it in the raw water intake to winter flush *that*.

Last edited by hellosailor; 02-07-2007 at 01:04 PM.
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Old 02-11-2007
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weekend assessment/fix

thanks all for the input. after running thru the system, heres what a found

- sediment in the raw water filter
- broken bits of impeller in the heat exchanger
- very dirty radiator water
- no thermostat
- 4 foot mooring line and plastic on the prop

remedies

- cleaned the raw water filter
- removed impeller bits and flushed heat exchanger
- replaced water w/ antifreeze in radiator
- removed rope/plastic off prop

ran it for about 2 hrs this sunday and engine ran cooler than normal and oil pressure kept normal. note i was running only 1500 rpms tho. hopefully this will work for longer motoring days.

thanks again!!!
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