when running car hard car car stays around 240 temp

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Aug 15, 2001 | 06:39 PM

CWIROC

Thread Starter

Junior Member

Joined: May 2001

Posts: 88

Likes: 0

From: Hampton, VA, USA

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.

Aug 15, 2001 | 06:57 PM

sunbitz

Member

Joined: Jun 2001

Posts: 470

Likes: 0

From: Lakeland, Florida

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.

Aug 15, 2001 | 11:30 PM

breathment

Supreme Member

Joined: Jun 2001

Posts: 3,175

Likes: 1

From: Bedford, Tx

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

Aug 16, 2001 | 06:38 AM

Ray87Z

Supreme Member

Joined: Jul 1999

Posts: 1,366

Likes: 0

From: Atlanta, GA, US of A

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

Aug 16, 2001 | 08:41 AM

Mark A Shields

Supreme Member

Joined: Jan 2001

Posts: 7,164

Likes: 1

From: Someone owes me 10,000 posts

Car: 99 Formula

Engine: LS1

Transmission: T56

Axle/Gears: 342

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
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3:73 Richmond Gears and 3" Hooker Aero Chamber
Corvette Servo & .500 boost valve
15.61@ 95.2mph G-Teched, 1-2 shift slippage, and just replaced a burnt plug wire
"There is nothing more addicting than speed"