After replacing it and re-assembling everything else, I was optimistic as I started getting warm air as the system started to come up to temp. We actually had to drop the steering column, pull the entire dash, and evacuate the AC system to get the HVAC unit out in order to replace the heater core. Ordered a heater core from Rock Auto and had it in two days. I tried flushing the heater core out with vinegar and CLR, but neither worked. The caveat to this is that they said the heater core was extremely clogged up and there was little to no heat blowing. Out the door price was $499.35 which included the coolant diagnostic, radiator, fan clutch, and labor. I agreed to their replacement solution (at 4pm on a Tuesday) and they called me at 10am the next morning saying my truck was fixed. They diagnosed and extremely clogged radiator as well as a shot fan clutch. They tested the coolant and determined that I did not have a blown head gasket, thankfully.
Immediately, my overheating issue became exponentially worse and I couldn't drive the truck a half mile without the temp skyrocketing to 260 degrees and overheating.Īt this point, we rented an 18 foot trailer and hauled my truck to an auto shop down the road. I'm sure most people here know this, but DO NOT USE THIS STUFF IN YOUR VEHICLE. It was kind of a knee jerk reaction and a mistake. That being said, my uncle had mentioned that I may have a blown head gasket and I decided to dump about 3/4 of a bottle of Bar's Head Gasket Repair into my radiator (without searching google beforehand). I've been an aircraft avionics technician for almost 14 years and digging into things like this doesn't phase me. Now, let me pause to say that I'm generally very mechanically inclined. The truck has a nice digital cooling readout in the dash, so I was able to observe the temp fluctuating between 225 and 250, however the overheat light never came back on so that tells me it was way hotter than that when I did get the overheat light.Īfter speaking to my mechanic uncle, I swapped the thermostat. If I touched the gas, the temp shot up and if I was coasting the temp slowly dropped. It was definitely only being air cooled for the last 1.5 hours of that drive. After letting it cool down, I was able to get the rad cap off, top it off, and limp it down the highway to my inlaws' house.
I got off at the next exit and stopped at an Autozone (first building off the ramp thankfully), stopped the truck, and promptly watched the overflow bottle boil over. About 4 hours into the drive on December 19th, shortly after rapidly accelerating after a restroom break at a Love's truck stop, my dash started flashing an overheat warning. So, I'm stationed in South Carolina and we were planning to visit family over the Christmas and New Years holiday. The vehicle in question is a 20 with the 4.7L V8 motor. I figured I'd make my introductory post here by detailing my recent overheating debacle, the mistakes I made, and the fixes to all of my issues. Fair warning, I'm not new to forums and can be a little long-winded. Howdy ya'll, long time lurker, first time poster.
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