3) or any other coolants have been mixed, it will be necessary to flush the cooling system. NOTE: If OAT (MOPAR P/N 68163848AA Purple) has been Mixed with HOAT (MOPAR P/N 68048953AB Pink Or Factory Fill HOAT Orange (Fig. This could show upĪs aluminum pipes turning black in the coolant system, engine overheat, or leaks in the debris (particles) floating in the coolant.įurther inspection by the technician may find corrosion in the system.accelerated corrosion within the engine and cooling systems.For heavy duty truck and extreme duty cycle applications refer to the Service Information or Owner's Manual for proper maintenance schedules.ĬAUTION: Vehicle Damage may occur if dissimilar coolants are mixed!Ĭoolants of different technologies are not compatible nor interchangeable (OAT, HOAT or OAT coolants have a service interval of 10 years or 150,000 miles. This new coolant is an Organic Additive Technology (OAT) (Fig. has released a new engine coolant for the 2013 model year vehicles and beyond, for all engine applications except the ones listed in the note above. NOTE: This bulletins applies to all vehicle listed above for every engine applicationĮXCEPT the 2013 MK equipped with the 2.2L Diesel engine (sales code ENE)Īnd the JC vehicle equipped with the 2.0L Diesel engine (sales code EBT).Ĭhrysler Corporation LLC. You saw the pic above, now compare it to this pic (same purple OAT)Īttention! Release Of New Engine Coolant Organic Additive Technology (OAT)Ģ013 (DP) Ram Truck (4500 / 5500 Chassis Cab) You can even pop open your radiator cap on your 14 and the coolant looks so orange you'd bet me your jeep that it's orange, but it isn't. As a result, due to a weird light refraction, the purple OAT looks weird (even orange) when looked at certain angles. When Chrysler switched to OAT, they didn't want dealers/people getting confused, so to differentiate the new OAT coolant with the chrysler original orange HOAT, they added a purple dye. Fiat has been using orange colored OAT for years. If you go to the dealer to buy OAT, and the price is too cheap, they gave you the wrong one.Ī little background on the color so that the next part makes sense to you guys.As we know, FIAT is with Chrysler now. It is $50-$60 a gallon (yes you read that right) so unless you have an emergency, buy it online, where it goes from $29 a gallon or so. The fourth thing you will know (not from the pic) is that OAT is priced like gold. I LEFT THE ABOVE IN IN CASE SOMEONE GETS A LEFTOVER BOTTLE FROM A THIRD PARTY UPDATE, CURRENTLY, BOTH BOTTLES NOW USE BLACK CAPS, SO DO NOT RELY ON THIS BEING AN INDICATOR. The third thing you need to know is that the cap on the OAT is black while the cap on the HOAT is blue. The second thing you'll notice is that the HOAT coolant is rated for 5 years and 100K miles while the OAT is rated at 10 years 150K miles. The first thing you are going to notice is the color.OAT (13+) is purple and HOAT (12-) is orange. For whatever reason, chrysler doesnt label them as HOAT/OAT so you need to know the signs to make sure you are getting the correct one. CHANCES ARE THEY WILL PUT IN THE WRONG ONE, SO IF GETTING SERVICE, MAKE CERTAIN THE CORRECT COOLANT IS USED! DO NOT COUNT ON THE DEALER KNOWING WHICH COOLANT YOUR RIG TAKES. JK's 2012 and below use HOAT coolant and 2013+ use OAT coolant. THESE TWO COOLANTS DO NOT MIX, AND A CHEMICAL REACTION WILL CAUSE IT TO GEL (more on this later.) The first thing you need to tattoo in your brain is this. Ok, first thing is first.there are two types of coolants used on the JK.HOAT (Hybrid Organic Additive Technology,) and OAT (Organic Additive Technology.) DEALERS DON'T KNOW WHAT THEY ARE DOING AND ARE JUST DUMPING IN WHATEVER COOLANT IS ON-HAND. THIS IS BECOMING A VERY COMMON PROBLEM AND WILL ONLY GET WORSE. Hey guys, I haven't seen a thread like this here, so I would like to post it up.if the higher powers find it useful enough, I think it should be a sticky, as a very innocent move can cause HAVOC on your entire cooling system/motor.
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