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Showing results for tags 'dexcool'.
Hello I'm about to do a cooling system flush and radiator change on my 2003 Sierra 5.3 1500 "T" engine. I was wondering if I could use the HOAT blue Mitsubishi coolant instead of the dexcool. A friend of mine works in a dealership, and he offered a pretty good price on them, and I've been asking around about it and most said that this coolant is the best when it comes to additives. But I'm skeptical about using a totally different coolant in a Chevy, as most people I know use either the orange dexcool or the green stuff. That, and a lot of people hate on dexcool for some reason. What do you guys think?
I did a coolant flush on my 5.3 '03 Sierra and changed the fluid from green to Prestone orange coolant. I had mild overheating issues prior to the flush, so I figured flushing the coolant and changing to orange Prestone might help (I did the same exact thing in my '04 GTO with LS1 and haven't had overheating issues since forever). Now the temp always goes above midway, and here's the thing... It does the same thing even on the HIGHWAY with fans on high speed, and it sometimes goes down in traffic only (basically when I'm not giving the engine any acceleration). I changed the coolant again with dexcool, and did an air bleed, changed the temp sensor and thermostat two months ago, and cannot see any leak from the pump but still nothing is helping. I'll note that the green coolant didn't look dirty when it I flushed it out, and that it only heats up when I'm accelerating.
2001 2500HD 6.0 Took my truck to a national chain that I've used before and Trust. Never mind which one. Had the coolant changed and some other front end issues worked on this past Saturday. When I left it was a little warm so I was running my air conditioner. Then yesterday it cooled off quite a bit so I turned on the heater and a few minutes later the low coolant light came on. I started to drive home anyway thinking it was maybe just a little bit low. But I hooked up Torque application using my OBD2 diagnostic in the coolant temperature was steadily Rising. I decided to take my truck back to work and drive a work truck home. Here is where I admit some ignorance about the procedure and I wonder what might have happened. When the coolant is flushed, aren't they supposed to run it through the heater core somehow? Or maybe they did and then it had an air bubble in it and so it didn't fill the heater core? Or maybe there was a very large air bubble somewhere else in the system? I did check the Overflow container and it looked empty but it was dark. The engine was fully warmed up. So what could have possibly happened or what did they forget to do? Or maybe it just needs a little more coolant?