![]() ![]() ![]() M30s OTOH, I'm pretty talented at killing those. I've tried my best to kill an m20 in the past without success, I'm not sure it's possible without really horrendous neglect. On the bright side, it's not an m5x, so it didn't 'splode or overheat. I'll probably repeat a few more times to get as much out as possible, then refill with antifreeze before the cold temperatures get here. I'll run that for a little while, then drain and fill again. I flushed and flushed and flushed, then filled with tap water. Too strong of a glycol presence combined with tap water and the depletion of the corrosion inhibitors seems to cause this sort of thing. Leftmost box on the strip for pH, that's 7.5 or less, so the additive package and reserve alkalinity had all been used up.Īccording to the InterTubes, this particular issue is why BMW specifies silicate-free coolants with distilled water for their systems. Rightmost box for freeze protection indicates freeze point -60 deg F or better, so pretty strong glycol presence. Some driveway forensics with a coolant test strip reveals: Yep, that's pretty much exactly what I'm seeing. I top them every single time they come in the shop, and the level is always "a bit low" but at the same exact level they were "a bit low" at the time before. Any company that sells coolant if they label it DexCool it is from the original formula. (plastic in gaskets were hard hit) Even with that GM still sells its branded coolant with DexCool. I noticed there was plenty of sludge buildup, likely from previous owner mixing coolant. ![]() Last week the engine started overheating, with the temperature gauge jumping up and down constantly. In my experience, it will never get lower than that, but every single m50/ m52/ m54/ m56 cooling system level is always just barely below the "kalt wasser stand" after the system has been thoroughly heat cycled. GM users found that some parts within their engines would dissolve leaving a sludge of brown material that did a lot of damage. 3.5L 6 CYL 2WD AUTOMATIC 147,000 MILES A friend of mine has the vehicle listed above. Crystal Clean DEX-COOL® complies with GWM3420 (formerly GM6277M) specifications and is approved for warranty work at GMSPO dealer pricing for new coolant. Then when it cools down, the level for what ever reason is always below the "kalt wasser stand". Our Services Antifreeze / Coolant DEX-COOL Extended Life Antifreeze / Coolant Crystal Clean DEX-COOL is a General Motors licensed DEX-COOL® Antifreeze/Coolant. When the cooling system is HOT, is pushes out all of the air from the expansion of the coolant, as well as a bit of the coolant. I do not have an explaination for the m20, but I believe the m50/ m52/ m54/ m56 expansion tanks were not properly designed for our climate. I do not have an explaination for why he has a chocolate milk cooling system now, but a bit of green coolant should not have caused that. Dex cool/ VW/ Audi coolant is NOT compatible with the green/ blue/ yellow coolant and will cause problems. It doesn't have problems when going 65MPH or so.Blue and green coolant SHOULD be completely compatible, though not the same. How exactly should I go about switching to the proper Dexcool coolant? Would it do more harm than good to switch now?Īlso, my car is having problems in that it overheats when sitting in traffic or idling. So I've been running green coolant for about a year now. The cause was traced to conductivity of the fluid and some temperature sensors leaking voltage into that fluid. Which included seal degradation mentioned above, erosion of plastic parts (including intake manifolds, waternecks, etc. The Lawsuits had to due with the coolant turning into gel or jello and causing over-heating. but our local GM dealer was switching alot of cars back to regular Ethelyn glycol (green antifreeze) after they had too many warranty problems with Dex-cool (propylene glycol). I took it to another mechanic and after fixing the leaks, he also filled it up with green coolant. Contrary to common belief, intake gaskets fail regardless of DexCool or Green antifreeze. Well, reading up more I realize that I'm wrong.Ībout 6 months ago, I had a wreck and got the radiator replaced(salvaged) and the mechanic(who I'm convinced now is an idiot) filled it up with green coolant along with leaving several leaks. I ignored the Dexcool warning in my manual as one of those "you also need to take it to a certified dealer to get the oil changed" type of warnings. At the bottom of the expansion tank was an orange crust(also the manual recommend DexCool. Hello I realized today after beating my head about my car's overheating problems that I have the wrong coolant in it.Ībout a year ago, my car ran dry. ![]()
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