ParisTNDude
Active member
I know this is a very old subject and I've searched for remedies to the reports of overheating on the single fan C4s and found most would agree, these C4s need an all aluminum 2 row radiator to fix the problem. However, I was perusing the GM 1984 Corvette Shop Manual, Electrical Troubleshooting Shop Manual Supplement, I bought off eBay and found the description of the cooling fan circuit operation which says, "When the engine temperature reaches approximately 114 degrees celsius (238 degrees F), the switch closes completing the Fan Motor circuit to ground." This is talking about the operation of the "Engine Coolant Temperature Switch" which is wired in series with the "Engine Cooling Fan Relay" that turns the fan on and off. If that's the case, it looks like you wouldn't have to worry about temperatures in the 220-230 degree range. What do you think???