Question on Engine Temp

[chesnut]

DRM500RUBYZR-1,

Appreciate your good suggestion about the coolant pressure tester.

Did the pressure test after installing new radiator earlier this month. Also replaced the pressure cap as a precaution and also tested it.

Out of caution, I recheck the clamps for tightness every time I take off on a Road Tour.

Was interesting for me to read that Chevrolet engineered C4's to run 220+ to help pass EPA standards. And used the same radiator through the C4 Corvette run without any regards to HP.

My '92 runs good temps around 200~212 with normal highway driving, even in hot Texas summer 105 degree temps, with A/C on as long as i keep the car moving. It's the stop'n'go traffic that I get stuck in, that causes the temp to creep up to around 240. Never had a Corvette run that hot before, ever. It's never puked. But this June it did shut off the A/C, which was a first.

Fixin' to head out on the NCRS Convention Road Tour. Installed new 2 row DeWitt radiator, Marc Heibeck's 170 degree thermostat and chip.

Thanks again for sharing.

Gary
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[chesnut]

Status report after driving 3,124 miles on the NCRS Convention Texas Road Tour to Hampton Roads, VA.

Before the trip upgraded the cooling system with a new DeWitts 2 row, new thermostat, Marc Heibeck's throttle body bypass tube & chip. Also, installed a debris screen.

When I removed the upper radiator shroud, found all kinds of trash on the radiator, etc. including a page from a porno magazine 2002 printing.

Trip to Hampton Roads - Engine temp was running 200 to 230 depending upon the gear and traffic. Stop'n'go traffic in 100 degree heat drove temp over 240 and to 250.

Air cleaner on car is the aftermarket Automotive Performance Intl. from Seattle, WA with the big scoop in front of the condenser and radiator.

In Ashville, NC decided to remove the scoop. Stopped by Harbor Freight and bought a compass hand saw. Roughly cut the scoop off of the air cleaner.

Return home trip with outside temp 95 to 100 degrees - cooling was improved 190 to 200 degrees at 70~75 mph in 5th & 6th gear. 50~60 mph in 4th gear up to 210 degrees. Stop'n'go traffic for over 30 minutes, engine temp never got about 235 degrees.

Every evening during the trip, cleaned road trash off of the debris screen, which before would've been sucked into the radiator.

Duh, never dawned on me the air cleaner's big scoop was restricting air flow to the condenser/radiator.

Appreciate everyone's help and advice.

Gary
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