overheating

  1. Samuel Churchill

    94 Blazer Coolant Temperature Fluctuating

    Hello I have a 94 Blazer that has an unusual problem of the gauge jumping up to 260 degrees and then after a couple of seconds dropping back down to 210. This will happen at cruising speed, in town, and even at idle. I replaced the thermostat as well as the coolant sending unit in the head. The...
  2. brycebba

    5.7 from 99 GMC Yukon having heat issues

    Ok so hear is my flood of information. I transplanted a 99 GMC Yukon 5.7 of mine into my 97 Jeep Wrangler TJ. I had the engine rebuilt while it was out but no performance changes made. Here is the current configuration. AC condenser is in front of radiator Then a 4 core radiator with left side...
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