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when running car hard car car stays around 240 temp

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Old 08-15-2001, 06:39 PM
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when running car hard car car stays around 240 temp

My car is not overheating. When i am driving car the temp gauge runs arond 240 just below red line. if I am just driving regular. The car temp gauge sits reg in the middle.i run a aftermarket weiand water pump, griffin rad,
160 thermostat,and 185 fan switch. i have done a presure test and the fans are turning on, this are all good.Thremastat does open up.it is not overflowing or overheating.If anyone has any ideas why. Ill check it out. 1990 305 TPI

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1990 IROC TPI305, MSD 6A, DYNOMAX MUFFLER, MEGASHIFTER, 160 THERMOSTAT, HYPERTECH FAN SWITCH, AND A BLASTER COIL. WITH MORE TO COME!
2000 WS6
Dynomax muffler,
Paxton 12psi supercharger, Dynomax muffler and high flow cats, MSD ignition 6al and wires, corvette shift kit for my automatic tranny.
Old 08-15-2001, 06:57 PM
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Car: 91 RS Convertible
Engine: 305 TBI
Transmission: 700R4
Well, you're not overheating but just running warmer than you'd like it to be.

Since everything has been checked and the fan/fans are coming on then there are only a few things left to check for.

1) Air Dam which is located underneath the car directly under the radiator. If it's missing then replace it.

2) Trash piled infront of the radiator or inbetween the radiator and ac cooling rad. To check this you can take off the top radiator support and lean the radiator back a few inches. It might be better to just slide under the car with a flashlight though.

3) Lower radiator hose is collapsing. After you do some driving... pop the hood and give it some gas while watching the lower radiator hose.

There are a few other tricks as well, but I'm not too familiar with them and I'll leave those to the experts.
Old 08-15-2001, 11:30 PM
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ok, im kinda confused, so u say the car runs warm when u are driving it hard? like constantly flooring it, high RPMS, etc? if so, then how long does it take to go from normal to 240?

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass
Old 08-16-2001, 06:38 AM
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Car: 94 Z28
Engine: LT1 w/ headers, catback, CAI, tune
Transmission: 4L60E
Axle/Gears: 3.23s
You seem to have all the bases covered, it's just about got to either be an inaccurate guage or a missing/torn up air dam. I'm betting on the air dam being the culprit...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray
Old 08-16-2001, 08:41 AM
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Car: 99 Formula
Engine: LS1
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Check your radiator cap. Maybe get new one, only like $4 and can cause overheating if they don't hold pressure.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
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Rebuilt 700R4, with manual valve body
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