BMW Coolant Use

[vettenuts]

Have a 2003 Liberty with the Chrysler coolant that was put in when the heater core was replaced. Coolant is a little low and I want to top it off. I have some BMW Coolant that is a HOAT formulation, which is what Daimler used in Jeeps when they owned them.

Has anyone mixed these two coolants?

 

[M38 Bob]

If it's clearly listed as HOAT, don't matter if color's different, it's still HOAT.

Bob

EDIT; If it's full strength, mix to 50/50 with water.

 

[ltd02]

I agree with Bob and say its OK to top off.

Just be aware there are different formulations in coolants besides the HOAT package. My Toyota takes a HOAT based coolant but requires it be silicate free. I believe the Mopar and Zerex G-05 are both low silicate. Zerex makes an Asian compatible version that is HOAT and silicate free.

 

[vettenuts]

The BMW coolant is phosphate, amine, & nitrite free but does have silicates in it from what I understand. I also believe that the Chrysler coolant of the 2003 vintage (or Zerex G-05) does as well. BMW went extra lengths to protect both the aluminum and the plastic parts within the cooling systems so I would think it is OK to use.

 

[ltd02]

The BMW coolant is phosphate, amine, & nitrite free but does have silicates in it from what I understand. I also believe that the Chrysler coolant of the 2003 vintage (or Zerex G-05) does as well. BMW went extra lengths to protect both the aluminum and the plastic parts within the cooling systems so I would think it is OK to use.

Sounds like a good match to me. My Toyota also has some phosphate salts in there which the Mopar does not. Leave it to Toyota to make things difficult :emotions34:

Fortunately my Ranger and Subaru both take the old timey green stuff and my KJ and Avenger take the Chrysler compatible HOAT. Only the Toy is the outlier.

 

[Birdman330]

If it's clearly listed as HOAT, don't matter if color's different, it's still HOAT.

Bob

EDIT; If it's full strength, mix to 50/50 with water.

Bingo, in reality Coolant is clear as water. Dyes are added to distinct them from one another IE Brand via Manufacturer or Type. So if you have a red HOAT and a Blue HOAT say from some Auto Manufacturer and Aftermarket Manufacturer they're the same just different color dye.