![]() Recently I had a visit to dealership with AC evaporator problem and since they keep my jeep for over a week and did nothing, now they are closed due to corona virus, so they told me to pick up my jeep and come back when they reopen, which may be not soon. ![]() I did not confirmed yet if my wife's also 2019 Cherokee has the same coolant, but since it is also Pentastar V6 and coolant color is the same, I tend to say it should be the same situation, but hers jeep has nice clean coolant expansion tank, no sludge whatsoever. On the other side of dealer "normal" bs situation, I agree, they are not great with mechanic intuition and experience, unless your wheels fall apart or you have a hole in your engine in most cases it is "normal" for them. I do oil changes myself and I did not noticed any changes in oil color when drained. Engine oil on dip stick looks normal to me. My first thought was also an oil in cooling system, but usually there are additional oil drops floating on the surface of coolant, which in this case I could not find. And quite frankly, a Jeep you definitely will need to replace the coolant for cooling system repairs by or after 150k miles anyway, so what is that 150k mi/10 year life getting you compared to the 100k mi / 5 year life?Ĭlick to expand.Thank you all for your input so far. IMO, it really is much better protecting and more trouble free coolant, the only drawback is you have to replace it a little more often. ![]() IMO, if I got a new vehicle with the OAT coolant, I'd seriously consider thoroughly flushing it, like really thorough, and retrofitting to the HOAT coolant (Zerex G-05). Most likely, the OAT coolant is reacting with something, either a small leak that let some air the system to form a little rust or someone added the wrong coolant to the system. ![]() So wouldn't over-react to a little wet sludge on the bottom of the cap. If you notice an oily surface in your coolant, immediately have your mechanic inspect your Grand Cherokee for head gasket leakage.Don't know on 3.6L, but the previous generation 3.7L, the oil filler tube, that had the oil cap on it, would trap a little moisture in the tube and produce a white emulsified sludge on the bottom of the cap. Taking off the coolant reservoir cap on a warm engine could cause the cap to up explosively and fluid to spray out of the reservoir. See our video on how to add engine coolant for tips on adding coolant to your Grand Cherokee.Īlways wear safety goggles when working on your Grand Cherokee. If you need to add anti-freeze, be sure to check your owners manual to determine the correct type of coolant to add - in Jeeps, it usually located in a section titled Fluid Capacities towards the end of your manual. ![]() The video above shows you where the coolant reservoir in your Grand Cherokee is located and how to check the coolant / antifreeze level. Engine coolant / antifreeze circulates through your engine to keep it cool in the summer but won't freeze in the winter. In order to get an accurate reading, your 4.0 liter engine should be cool to the touch when you check it. Checking the engine coolant (also known as antifreeze) level in your 1998 Jeep Grand Cherokee is pretty easy. ![]()
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