---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 07/26/09: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:07 AM - Re: 912 UL for sale (fjocampo) 2. 02:19 PM - 912ULS Coolant (Tommy Walker) 3. 02:44 PM - Re: 912ULS Coolant (Ken Arnold) 4. 05:35 PM - Re: 912ULS Coolant (Roger Lee) 5. 05:53 PM - Re: Re: 912ULS Coolant (Ken Arnold) 6. 06:00 PM - Re: 912ULS Coolant (Tommy Walker) ________________________________ Message 1 _____________________________________ Time: 11:07:16 AM PST US Subject: RotaxEngines-List: Re: 912 UL for sale From: "fjocampo" I need a rotax 912 only the engine Read this topic online here: http://forums.matronics.com/viewtopic.php?p=254809#254809 ________________________________ Message 2 _____________________________________ Time: 02:19:34 PM PST US Subject: RotaxEngines-List: 912ULS Coolant From: "Tommy Walker" Ro-Taxers, I think most 912 owners in the U.S. use dex cool antifreeze in a 50/50 ratio in their cooling systems. I have a gallon of Prestone 50/50 premix that states it can be mixed with any glycol type antifreeze. Is anyone using this brand and do you have any comments about using it? Thanks, Tommy Walker in Alabama Do Not Archive -------- Tommy Walker N8701 - Anniston, AL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=254821#254821 ________________________________ Message 3 _____________________________________ Time: 02:44:15 PM PST US From: "Ken Arnold" Subject: Re: RotaxEngines-List: 912ULS Coolant I have a 912ULS that cost about $20,000. Why would you take a chance. Why not drain it and fill it up with a known antifreeze? Seems like a more cost effective insurance. Ken do not archive ----- Original Message ----- From: "Tommy Walker" Sent: Sunday, July 26, 2009 5:18 PM Subject: RotaxEngines-List: 912ULS Coolant > > > Ro-Taxers, > > I think most 912 owners in the U.S. use dex cool antifreeze in a 50/50 > ratio in their cooling systems. > > I have a gallon of Prestone 50/50 premix that states it can be mixed with > any glycol type antifreeze. > > Is anyone using this brand and do you have any comments about using it? > > Thanks, > Tommy Walker in Alabama > > Do Not Archive > > -------- > Tommy Walker > N8701 - Anniston, AL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=254821#254821 > > > ________________________________ Message 4 _____________________________________ Time: 05:35:03 PM PST US Subject: RotaxEngines-List: Re: 912ULS Coolant From: "Roger Lee" Hi Tommy, Most any will work. Only so many ways to make antifreeze. Any 50/50 will work. Needs to be silicate free. Some antifreeze's don't mix with DexCool. Make sure that if you use a DexCool antifreeze that you only put something back in that is Dex Cool compatible. If you need to just top off a low reserve tank then distilled water works best. If you are changing your coolant then flush out any old DexCool before putting something else back in. WHY, because In particular, alkali metal silicates have been found excellent for protecting aluminum against corrosion. In glycol-based radiator protectants, however, they tend to form gels or even to precipitate, so creating a need for special silicate stabilizers. Examples of constituents of such combinations of active substances include salts of organic acids which, especially in the form of their alkali metal salts, are efficient corrosion inhibitors, whereas the free acids are less effective or may even be corrosive. The incidence of free acids in radiator protectant formulations as a possible result, for example, of oxidation processes or the ingress of nitrous gases into the cooling system is therefore highly undesirable. It is for this reason that radiator protectant formulations contain small amounts of agents known as reserve alkalinity donors which have a buffer action in the relevant pH range and so prevent the formation of free acids. Examples of compounds employed as reserve alkalinity donors are amines and phosphates and, in particular, the less expensive borax. Such corrosion inhibitor compositions are described, for example, in EP-B-0 229 440 and EP-A-0 308 037. Because of the above-described disadvantages associated with the use of silicates as corrosion inhibitors for aluminum, in recent developments a trend has been noted to omit them and instead use other active substances. Under these conditions, however, the reserve alkalinity donor, borax, is highly corrosive, and so can no longer be used. The use of phosphates in modern-day radiator protectant formulations is likewise undesirable. This applies to an even greater extent to amines, on the basis of their characterization as potential nitrosamine formers." -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Service Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=254833#254833 ________________________________ Message 5 _____________________________________ Time: 05:53:01 PM PST US From: "Ken Arnold" Subject: Re: RotaxEngines-List: Re: 912ULS Coolant Hey Rog, What does one of those nitrosamines look like? I got to check my fluids. Ken do not archive ----- Original Message ----- From: "Roger Lee" Sent: Sunday, July 26, 2009 8:34 PM Subject: RotaxEngines-List: Re: 912ULS Coolant > > Hi Tommy, > > Most any will work. Only so many ways to make antifreeze. Any 50/50 will > work. Needs to be silicate free. Some antifreeze's don't mix with DexCool. > Make sure that if you use a DexCool antifreeze that you only put something > back in that is Dex Cool compatible. If you need to just top off a low > reserve tank then distilled water works best. If you are changing your > coolant then flush out any old DexCool before putting something else back > in. > > WHY, because > > In particular, alkali metal silicates have been found excellent for > protecting aluminum > against corrosion. In glycol-based radiator protectants, however, they > tend to form > gels or even to precipitate, so creating a need for special silicate > stabilizers. > > Examples of constituents of such combinations of active substances > include salts of > organic acids which, especially in the form of their alkali metal salts, > are efficient > corrosion inhibitors, whereas the free acids are less effective or may > even be corrosive. > The incidence of free acids in radiator protectant formulations as a > possible result, > for example, of oxidation processes or the ingress of nitrous gases into > the cooling > system is therefore highly undesirable. It is for this reason that > radiator protectant > formulations contain small amounts of agents known as reserve alkalinity > donors > which have a buffer action in the relevant pH range and so prevent the > formation > of free acids. Examples of compounds employed as reserve alkalinity donors > are > amines and phosphates and, in particular, the less expensive borax. Such > corrosion > inhibitor compositions are described, for example, in EP-B-0 229 440 and > EP-A-0 308 037. > > Because of the above-described disadvantages associated with the use of > silicates as > corrosion inhibitors for aluminum, in recent developments a trend has been > noted to > omit them and instead use other active substances. Under these conditions, > however, > the reserve alkalinity donor, borax, is highly corrosive, and so can no > longer be used. > The use of phosphates in modern-day radiator protectant formulations is > likewise > undesirable. This applies to an even greater extent to amines, on the > basis of their > characterization as potential nitrosamine formers." > > > -------- > Roger Lee > Tucson, Az. > Light Sport Repairman - Maintenance Rated > Rotax Service Center > 520-574-1080 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=254833#254833 > > > ________________________________ Message 6 _____________________________________ Time: 06:00:40 PM PST US Subject: RotaxEngines-List: Re: 912ULS Coolant From: "Tommy Walker" Ken, Thanks for your reply. I was under the impression that Prestone was the most popular anti-freeze in the U.S., but then, what do I know? Tommy Do Not Archive. arno7452(at)bellsouth.net wrote: > I have a 912ULS that cost about $20,000. Why would you take a chance. Why > not drain it and fill it up with a known antifreeze? Seems like a more cost > effective insurance. > > Ken > > do not archive > > > > > > --- -------- Tommy Walker N8701 - Anniston, AL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=254836#254836 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.