Low Coolant Light

DropTop91Five.O · 08-29-2006, 09:34 PM

Hello all, I'm new to the Mustang ownership. I've got a 91 LX 5.0 Convertible. Love it so far and plan on loving it.

Anyone good with Low Coolant Light on dash?? I did a Penzoil radiator flush hoping that would fix the problem, but it didn't.

The car doesn't get hot and there doesn't appear to be any coolant leaking. Already changed the thermostat.

Any ideas???

Thanks for any help.

Sam
91 LX 5.0

meknized · 09-01-2006, 04:05 PM

Hey,

4 out of 5 GT's that I have had, had that low coolant light go on all of the time. I'm sure you do not have problem with the cooling system, the problem is that little sensor on the radiator overflow tank goes bad or there is a crack in that tank and it keeps getting low and it will show low coolant even when things are OK.
2 things you could do, 1: Is to find a different tank with a sensor on it or fix the crack if it has one. 2: The easiest and cheapest is to pull the connector off of that tank and just keep an eye on your water temp. Pulling the connector will keep the light off.

vristang · 09-01-2006, 08:42 PM

Just clean the sensor at the end of the overflow cap.

It builds up corrosion and goo, which inhibits conductivity between the terminals.

jason

DropTop91Five.O · 09-03-2006, 07:49 PM

Hey, Thanks for the pointers. I'll try them tommorow since it's a free day off work!!!

Sam

08-29-2006, 09:34 PM	#1
DropTop91Five.O Registered Member Join Date: Aug 2006 Location: Tulsa, Oklahoma Posts: 3	Low Coolant Light Hello all, I'm new to the Mustang ownership. I've got a 91 LX 5.0 Convertible. Love it so far and plan on loving it. Anyone good with Low Coolant Light on dash?? I did a Penzoil radiator flush hoping that would fix the problem, but it didn't. The car doesn't get hot and there doesn't appear to be any coolant leaking. Already changed the thermostat. Any ideas??? Thanks for any help. Sam 91 LX 5.0

09-01-2006, 04:05 PM	#2
meknized fox fanatic Join Date: Jul 2004 Location: wichita Ks. Posts: 61	Re: Low Coolant Light Hey, 4 out of 5 GT's that I have had, had that low coolant light go on all of the time. I'm sure you do not have problem with the cooling system, the problem is that little sensor on the radiator overflow tank goes bad or there is a crack in that tank and it keeps getting low and it will show low coolant even when things are OK. 2 things you could do, 1: Is to find a different tank with a sensor on it or fix the crack if it has one. 2: The easiest and cheapest is to pull the connector off of that tank and just keep an eye on your water temp. Pulling the connector will keep the light off. __________________ meknized Blue/silver 89 GT, Coast 331, ported GT-40x heads, X cam, cobra intake, 70mm TB, 75mm bullet, mac intake, 24lb inj, 255 lph fuel pump, accufab regulator, pulleys, MSD coil, 6AL, 300+ wires, Tremec 5 spd. pro 5.0 shifter, FMS drive shaft, headers, X-pipe, flowmasters, auburn pro series posi. moser 31s axles,3:73s, etc. Best ET 12.02@112.5 a pic A vid of a run:http://www.youtube.com/watch?v=l9JMcErxML8

09-01-2006, 08:42 PM	#3
vristang Registered Member Join Date: Feb 2006 Posts: 50	Re: Low Coolant Light Just clean the sensor at the end of the overflow cap. It builds up corrosion and goo, which inhibits conductivity between the terminals. jason __________________ Check out my new Mustang website! - Including: TwEECer, EEC-IV, C&L, 351w Fox Swaps, PCV Oil Control, and more. 1990 GT - 408w - 17mpg TwEECer RT 1.30A10 - X3Z - A9L strat. / EA Forged Bottom End / Gapless Rings / CR 8.85:1 / Custom Cam / Ported Trick Flow Heads / Box Upr / Lightning Lwr 17x9 Cobras / Front 255s / Rear 275s / 5 Lug Cobra Disc Conversion / Auburn Ltd. Slip / 3.27 / 31 spline axles / Panhard Rod / Upr&Lwr Control Arms 1987 Red LX - 2.3L - Planning 2.3t Converison

09-03-2006, 07:49 PM	#4
DropTop91Five.O Registered Member Join Date: Aug 2006 Location: Tulsa, Oklahoma Posts: 3	Re: Low Coolant Light Hey, Thanks for the pointers. I'll try them tommorow since it's a free day off work!!! Sam

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