My D has 145,000 kilometers and I haven't changed the coolant yet so I'm thinking it is time. I've noticed the temp gauge not getting as high as it usually did but I'm not sure if this is related to the lack of changing the coolant. I watched a few youtube videos and they seem to be different.
1)they drained the coolant from rad, filled with water, ran the engine, drained again and then filled with 50/50 Coolant (I'm not sure this is a good idea because wouldn't some of the water stay in the system diluting the coolant? They didn't use distilled water either).
2)Drained the coolant from rad and filled with 50/50 coolant, then plan do do this again in a month to get the rest of the coolant out. (they didn't want to drain the block plugs because they couldn't identify them and worried they were seized).
My other question is what coolant to use as one of the videos mentioned that the block was aluminum with metal heads so you would get bad corrosion if you used the wrong coolant. I picked up a few jugs of Prestone 50/50 mix but now I'm not sure.
1)they drained the coolant from rad, filled with water, ran the engine, drained again and then filled with 50/50 Coolant (I'm not sure this is a good idea because wouldn't some of the water stay in the system diluting the coolant? They didn't use distilled water either).
2)Drained the coolant from rad and filled with 50/50 coolant, then plan do do this again in a month to get the rest of the coolant out. (they didn't want to drain the block plugs because they couldn't identify them and worried they were seized).
My other question is what coolant to use as one of the videos mentioned that the block was aluminum with metal heads so you would get bad corrosion if you used the wrong coolant. I picked up a few jugs of Prestone 50/50 mix but now I'm not sure.