High Engine Temperature in Traffic - my solution. - Page 2 - ZR-1 Net Registry Forums

WARP TEN · 07-17-2017

I will certainly second getting Marc's chip. I had one in both my earlier '93 and my '95. Worked great to control temps. However, there is one thing you should not forget and perhaps check. The C4s are "bottom feeders", meaning they pull air for the radiator up from below the front nose of the car. As a result, they also pick up a lot of sand, dust, debris, leaves, etc. Overtime, the fins in the radiator become plugged. When I first had an overheating problem with the '93, with about 40k miles on it, I had the radiator pulled out and it about 40% clogged. (Marc said he once removed a radiator and got about 20 pounds of sane out of it) Hosed it out to clean all the fins. Then installed Marc's chip and it worked fine ever since. It is often difficult to really see if the radiator is clogged while installed (I know Marc has a way to view much of it) so it seemed best to just remove it when I ran into the problem. The '95 was low miles and was not clogged so I just had Marc install the chip. --bob

G-Sting · 07-17-2017

Quote:

Originally Posted by Bruce

Morning all.
John, 118 degrees celsius is 244 fahrenheit so the thermostat is well and truely open! It was an experiment that cost me nothing as I had the stuff sitting around the workshop. I might look at a chip change one day but for the moment, its one of 6 cars sitting in the collection so the cost might not make it viable at this stage as its only driven perhaps once a month.

Greetings Bruce,

Might there be a way of posting some nice ZR-1 pics with that epic New Zealand landscape in the background?

Cheers,
'G'

USAF Retired · 07-17-2017

Try cutting the Radiator Shroud to allow direct cold air flow entering the engine?

BigJohn · 07-17-2017

No No No!
Let's not start cutting up the car.

Fluid levels up to snuff, clean radiator and still over heating!

07-17-2017	#11
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,090	Re: High Engine Temperature in Traffic - my solution. I will certainly second getting Marc's chip. I had one in both my earlier '93 and my '95. Worked great to control temps. However, there is one thing you should not forget and perhaps check. The C4s are "bottom feeders", meaning they pull air for the radiator up from below the front nose of the car. As a result, they also pick up a lot of sand, dust, debris, leaves, etc. Overtime, the fins in the radiator become plugged. When I first had an overheating problem with the '93, with about 40k miles on it, I had the radiator pulled out and it about 40% clogged. (Marc said he once removed a radiator and got about 20 pounds of sane out of it) Hosed it out to clean all the fins. Then installed Marc's chip and it worked fine ever since. It is often difficult to really see if the radiator is clogged while installed (I know Marc has a way to view much of it) so it seemed best to just remove it when I ran into the problem. The '95 was low miles and was not clogged so I just had Marc install the chip. --bob __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"

07-17-2017	#13
USAF Retired BANNED Join Date: Apr 2017 Location: Tampa, Florida Posts: 95	Re: High Engine Temperature in Traffic - my solution. Try cutting the Radiator Shroud to allow direct cold air flow entering the engine?

07-17-2017	#14
BigJohn Join Date: Feb 2012 Location: Ledyard,CT Posts: 8,239	Re: High Engine Temperature in Traffic - my solution. No No No! Let's not start cutting up the car. Fluid levels up to snuff, clean radiator and still over heating!