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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Old 05-13-2012
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Heavy duty coolant?

Greetings all: I can't find an old thread that I thought I read about heavy duty diesel engine coolant. I have an old Perkins (Westerbeke) 4.107 with the "wet" liners. The P.O. used conventional Prestone automotive coolant (green stuff). Seems that I read about red?? heavy duty coolant for diesel engines?

Time for me to change out some hoses, thus drain the coolant system.

My local NAPA dealer talks about "fleetcharge" coolant for diesels - any recommendations from the forum? Thanks!
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Old 05-13-2012
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Re: Heavy duty coolant?

You want extended life heavy duty coolant.
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Re: Heavy duty coolant?

Quote:
Originally Posted by Hudsonian View Post
You want extended life heavy duty coolant.
OK - understood. The question is: any brand recommendations? I assume that all "heavy duty" coolant is not the same?

Experience? Brand recommended / to avoid?? Thanks!
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Re: Heavy duty coolant?

The point I was trying to make is that you should use "extended life" coolant not permanent antifreeze. Yanmar recommends Texaco Long Life and Havoline Extended Life.

Perkins recommends Perkins Power Part Coolant or an ethylene glycol base antfreeze with a sodium nitrite/benzoate type corrosion inhibitor. The antifreeze mixture must provide cooling/corrosion protection at least as good as the requirements of the standards: ASTM D3306-74.
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Re: Heavy duty coolant?

Quote:
Originally Posted by BELLATRIX1965 View Post
OK - understood. The question is: any brand recommendations? I assume that all "heavy duty" coolant is not the same?

Experience? Brand recommended / to avoid?? Thanks!
A heavy duty truck forum would yield better information.

In the US and UK, heavy duty means it passes ASTM D 6210 and in general contains nitrite to protect the liners (though this can be done with other chemistry). It can be green or any other color, though generally the conventional life coolant (3-5 years) will be green and the long-life (5-7 years) will be red. While many will rave for long-life coolant, on an older engine with a history of conventional products (Prestone green) there is NO reason to believe a long-life product will be better than a conventional. In fact, there is considerable reason to believe it will be worse, as the inhibiting layers are different.


BTW, some OEMs still use conventional coolant for factory fill, as some large trucking companies request it that way. It is NOT obsolete, not like conventional automotive coolant is.

Good brands? In no particular order, Fleetguard, Texaco, First Brands (Peak), Penray, Recochem, Dober Chem, Caterpillar, Prestone (they make a good HD line), and a whole bunch of others. Many are relabeled for other folks. All of these make both long-life and conventional coolants.

Get any salt water (~ 150 ppm) in ANY of these and they are immediately condemned.
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Old 05-15-2012
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Re: Heavy duty coolant?

Heavy duty is marketing and it means about as much as "New and Improved!".

There are incompatibilities between some coolants and other coolants, and gasket materials. So check with Perkins as to what is compatible with your engine. Not by brand, but by chemical type/base.

In the worst case you use Prestone or other conventional "green" a/f again. Just don't get the "antileak" types unless you have a leaking problem, they actually reduce heat transfer and can clog up small passages.
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