DrDyno wrote:

Based upon the work of PCOLT94 (an electrical engineer) on corvetteforum, I installed a manual fan switch on my '96. It worked fine but threw a DTC and illuminated the Check Engine light. I was more uncomfortable with the illuminated light than the engine temp and removed the switch.

Interesting, on 92-93 (and probably 94-95) and the switch is throw a code for Quad Driver 3 which only monitor voltages in that circuit, it does not throw a check engine, so you don't see anything and the code means nothing. I haven't played with the newer ECM/PCM on the 96's though.


I don't understand why you would say increased air flow through the radiator [at low speeds or idling in traffic] would have no effect on engine temp. Isn't increased airflow the very reason the fans cycle off above 40 MPH?

I just don't think the extra airflow will do very much and it's not worth the $$$ to change, just my opinion.

Relative to "building up crud in the engine," do you mean within the cooling system or the fuel intake system? If I run an 80 - 100% water mixture with the No-Rosion products, there's very little to cause crud in the cooling system. Intake system crud should be handled with proper A/F mixtures, No?

The higher temps burn off the contaminates in the oil better.

With only 56K miles on my car and everything working flawlessly, I think you guys see ME as the problem, not my engine temps. You're probably right!