Quote:
Originally Posted by freebeard
I had an engine in my old panel van that had oil and cylinder head temp gauges. The cylinder head temp gauge had two pickups, on #1 and #3 cylinders, on a toggle switch.
I never saw any difference. Probably due to the dog-house oil cooler.
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Did you have a dual port with the OEM cylinder tins with the vanes? The single port engines with the non-doghouse shroud had hotter #3 cylinders because 1) the oil cooler made the #3 and #4 cylinders get hotter cooling air, 2) because the #3 and #2 cylinders were offset from the fan shroud and 3) because the way the single port draws in the #4 and #2 cylinders before the #3 and #1 cylinders the #3 and #1 cylinders receive more air and fuel and run hotter. So the #3 cylinder gets everything that would make it run hotter.
With the dual port with the doghouse shroud and cylinder tin vanes all of those problems are dealt with making all the cylinders run about the same.