![]() If you have the "organic" coolant, but then you mixed the green ethylene glycol into it, it would almost certainly react faster than if you had just tipped in bore water heavily laced with salts. All of these chemicals when mixed by the coolant manufacturer do their job fine (obviously, better quality coolants do the job better though), but when mixed they can also react with each other, sometimes quite strongly. In addition there are also chemicals added to these 4 initial types that are there to prevent icing in cold weather, or to prevent premature boiling in hot weather, or bth. There are 4 common different types of chemicals used in coolants to prevent dissimilar metal corrosion, or reactions between the salts in the water and the alloys/steels in the engine. Phosphates are good chelating agents which is why TSP works so well as a cleaner.Long answer.(deep breath). ![]() Does sebacate persist longer or is Toyota/CCI using a different alkaline buffer?īoth Valvoline/BASF and CCI don't list the phosphate component of their OEM and service fills, dipotassium phosphate has been used in old-school green as the phosphate component, a BASF patent(the same one listed on Zerex AF) mentions a phosphate salt that plays nice in hard water. ![]() I wonder if if there's an substantial difference between sodium benzoate and sebacic acid - they should be in theory compatible, benzoate has been proven by BASF in G-05. The inorganic acid salt is potassium hydroxide - which serves as an alkaline base and could provide an alkaline buffer to keep the pH towards the basic side of things. Sodium benzoate is the same OAT used in Zerex Asian Formula and yet Valvoline/BASF says it's fine for 10/100 service intervals. With the shorter service interval, it means more work for them. I can think of one reason though why Toyota mechanics might like the Red LL over the SLL pink. So unless one just doesn't trust Toyota Motor Corp on SLL pink use, or simply prefers the old shorter service interval Red LL, no reason not to use SLL pink. Otherwise, the Toyota weep hole tsb shown appears to dispel most those anecdotal observation concerns. 'Perhaps' in much older Toyotas, say pre-1996, I might stick with the red out of extreme caution for heater core solder. When they went to SLL pink ingredients indicate they went to sebecic acid/(sebacate) as the OAT inhibitor.Īs noted, Toyota says SLL pink is backward compatible with the Red and can be used in it's place. It confirms LL Red does contain/use organic acid, specifically sodium benzoate as an OAT inhibitor. That information comes directly off a jug of LL Red and posted when the red LL v pink SLL topic was discussed in 2010, linked. I'm now thinking the red LLC formula doesn't have an organic acid.Įthylene Glycol(107-21-1),Diethylene Glycol(111-46-6) Water() Organic Acid Salt(532-32-1) Hydrated Inorganic Salt(). If you think about it, the longer life of an OAT/xHOAT does help with advertised TCO of a car and sustainability.Īn triazole or similar chemical is used to protect lead solder in an coolant - and the OATs have less of that. While it was the first Toyota product to use a plastic tank radiator, the radiator core and heater core were still lead soldered brass. ![]() Someone here said Dex-Cool doesn't play nice with lead solder and while Toyota did say the pink SLLC can be used to service older cars I did notice my hoses turning white and some radiator seepage with the pink stuff on a 1991 Lexus LS400. Highly doubt Toyota switched the core engine metals - but they did phase out lead solder in the mid-2000s, they started to use all aluminum radiators and heater cores. With your knowledge base, did Toyota change internal engine metals in 2002? In other words, why do you think they went from Red to Pink? What is in the post 2002 Toyota engines need the organic acids? Or do they? I'm merely trying to learn. This is the type of information I'm looking for. "Toyota Super Long Life Coolant” or similar high quality ethylene glycol based non-silicate, nonamine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |