cooling system problem(need help)

rob madison · October 11th, 2010, 09:07 AM

I have a 98 cobra, put a brand new radiator, water pump, and thermostat in and its still overheating. What else could cause it to over heat?

Tang Stang · October 11th, 2010, 09:10 AM

Is the car stock? Is the fan operating correctly (both high and low speeds)? How high are the coolant temps reaching?

Lefty · October 11th, 2010, 09:11 AM

Headgasket, electrolysis, collapsing hoses, air in the system, etc.

We need more info...

As soon as you fire it up, does it start overheating?

I would first try purging the system of air as usually this is the most common first problem.

rob madison · October 11th, 2010, 09:18 AM

the car is all stock, when i fire it up and its at a idle speed, the temp gauge goes from cold to have way. I drove it up the street and the temp gauge started going towards hot as the car heated up more. My fan is working fine.

Tang Stang · October 11th, 2010, 09:22 AM

Did it just start doing this? I'd recommend installing a "real" gauge or using a handheld tuner to datalog coolant temps to see what the actual temps are. Halfway on the stock gauge doesn't tell you anything.

rob madison · October 11th, 2010, 09:29 AM

yeah, couple a weeks ago was on the highway with the a.c. on, noticed my last radiator was cracked on the side. So i took it out put the new one in with the pump and stat, and started having this problem. Do you think the radiator having a crack could have let in air in the system?

weems · October 11th, 2010, 09:30 AM

I'm not real familiar with SN95 cars but you might have to burp it.

Lefty · October 11th, 2010, 10:35 AM

Originally Posted by weems

I'm not real familiar with SN95 cars but you might have to burp it.

Yeah, Ryan, it's nearly the same procedure to burp it.

weems · October 11th, 2010, 01:24 PM

Then he definitely needs to do so, you can't just add water and go.

October 11th, 2010, 09:07 AM	#1
rob madison Newbie Join Date: Oct 2007 Posts: 23 iTrader: 0 reviews	cooling system problem(need help) I have a 98 cobra, put a brand new radiator, water pump, and thermostat in and its still overheating. What else could cause it to over heat?

October 11th, 2010, 09:10 AM	#2
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,960 iTrader: 2 reviews	Is the car stock? Is the fan operating correctly (both high and low speeds)? How high are the coolant temps reaching? __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

October 11th, 2010, 09:11 AM	#3
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	Headgasket, electrolysis, collapsing hoses, air in the system, etc. We need more info... As soon as you fire it up, does it start overheating? I would first try purging the system of air as usually this is the most common first problem. __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

October 11th, 2010, 09:22 AM	#5
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,960 iTrader: 2 reviews	Did it just start doing this? I'd recommend installing a "real" gauge or using a handheld tuner to datalog coolant temps to see what the actual temps are. Halfway on the stock gauge doesn't tell you anything. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

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October 11th, 2010, 09:18 AM	#4
rob madison Newbie Join Date: Oct 2007 Posts: 23 iTrader: 0 reviews	the car is all stock, when i fire it up and its at a idle speed, the temp gauge goes from cold to have way. I drove it up the street and the temp gauge started going towards hot as the car heated up more. My fan is working fine.

October 11th, 2010, 09:29 AM	#6
rob madison Newbie Join Date: Oct 2007 Posts: 23 iTrader: 0 reviews	yeah, couple a weeks ago was on the highway with the a.c. on, noticed my last radiator was cracked on the side. So i took it out put the new one in with the pump and stat, and started having this problem. Do you think the radiator having a crack could have let in air in the system?

October 11th, 2010, 09:30 AM	#7
weems Tech Exchange Head Honcho 2003 SVT Cobra 11.70 @ 121 Join Date: Aug 2006 Location: Forsyth/Statesboro, GA Posts: 9,176 iTrader: 3 reviews	I'm not real familiar with SN95 cars but you might have to burp it.

October 11th, 2010, 01:24 PM	#9
weems Tech Exchange Head Honcho 2003 SVT Cobra 11.70 @ 121 Join Date: Aug 2006 Location: Forsyth/Statesboro, GA Posts: 9,176 iTrader: 3 reviews	Then he definitely needs to do so, you can't just add water and go.

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