Thank you..... when I get home I’m going to look at those studs again. I think they are long and maybe the included bolts and lock washers are meant for the back side
When I get home tonight I will take a picture of mine and post it here to show you what I'm talking about
1. AC Delco doesn't make anything. They're a sales organization, not a manufacturing organization. First Guess: They get their fan clutches from Hayden. Second Guess: They get their fan clutches from China. 2. Automotive fans have a surprisingly low "redline". The fans offered by Hayden are limited to under 5K rpm as described in the Hayden catalog. I have every expectation that OEM fans are pretty-much the same in terms of RPM limits. Water pump pulley ratio is usually set up so that the water pump spins faster than the crankshaft. If the engine is spinning 5K, the pump is spinning significantly more than that. So how fast is the fan spinning? If the clutch isn't engaged, I don't expect there's any problem. Clutch engaged, fan speed increases...but there's almost certainly some amount of "slip" so the fan still isn't at water pump speed. And then some hot-rodder stuffs a Heavy-Duty or Severe Duty fan clutch on the engine for "better cooling". What they get is a fan clutch that never disengages properly because the automotive fan is too-light of a load for the clutch. So now, when the engine revs up, the fan speed is closer to water pump speed...and the stress on the fan is much greater because RPM-related stress increases with the square of RPM. https://www.haydenauto.com/en/products/fan-clutches/fan-clutch-types/thermal
Fired it up tonight. So far so good. Much, much, quieter than my old system. I’m wondering if the fan clutch was locked up and also I may have a more efficient and quieter fan blade design. And no coolant leaks so far.... lol
