low coolant light
Thread Starter
Burning Brakes
Joined: Dec 2004
Posts: 825
Likes: 0
From: Hanging out back with the dark horses. Wa.
low coolant light
My low coolant light comes on some times. Rad is full, overflow is good.
where would O find the sending unit for that?
88, TPI ,auto
Thanks, jeff
where would O find the sending unit for that?
88, TPI ,auto
Thanks, jeff
Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 60
From: Fremont Oh
sniper,
I have found generally when the low coolant light comes on "intermittantly" it has been an air bubble. You might let the car warm up ad idle and see if the water level drops I suspect that when the engine is warming up the water level is dropping.
I'm not positive but I think the sensor is in the block.
Hope this helps,
mo
I have found generally when the low coolant light comes on "intermittantly" it has been an air bubble. You might let the car warm up ad idle and see if the water level drops I suspect that when the engine is warming up the water level is dropping.
I'm not positive but I think the sensor is in the block.
Hope this helps,
mo
Race Director
Joined: Nov 2000
Posts: 10,340
Likes: 664
From: Beverly Hills (Pine Ridge) Florida
On an 87, the sensor is in the radiator, located on the pass. side below the radiator cap (single wire/connector going to the sensor), maybe 4" to 6" below the cap.
Have heard of "air bubbles", but only reason mine has tripped, is for actual coolant leak (head gasket failure in my case).
Plasticman
Have heard of "air bubbles", but only reason mine has tripped, is for actual coolant leak (head gasket failure in my case).
Plasticman
Thread Starter
Burning Brakes
Joined: Dec 2004
Posts: 825
Likes: 0
From: Hanging out back with the dark horses. Wa.
Yeah,
coolant level looks good when running. I just put a goodyear hose kit on it 2 days ago and bleed it. It comes on and then goes off.
Thinking maybe sending unit. Any other thoughts?
coolant level looks good when running. I just put a goodyear hose kit on it 2 days ago and bleed it. It comes on and then goes off.
Thinking maybe sending unit. Any other thoughts?
Racer
Joined: Feb 2002
Posts: 293
Likes: 0
From: Benoni Gauteng
The sensor sits in the radiator (right sidetank) under the cap, it has 1 wire connected to it, and all the ones i have seen have been a green wire. Maybe the wire has come off, and as you drive it earths (can't remember which way round it is) or the wire is damaged and same story.
Race Director
Joined: Nov 2000
Posts: 10,340
Likes: 664
From: Beverly Hills (Pine Ridge) Florida
The method I use to bleed it is as follows:
1. With engine cold, remove cap (just let it sit on the radiator opening, without turning it).
2. Have fresh coolant ready to pour in. Start engine, and raise engine RPM to somewhere around 1200 to 1500 (I use a washer or folded paper under the throttle stop). Turn up the heat and turn on the blower as well.
3. Watch the temp guage, and as it approaches the thermostat rating, take off the cap. As soon as the thermostat opens, you will see the water level drop. Top off the radiator with coolant, and replace the cap (tighten it down), and your done.
Plasticman
1. With engine cold, remove cap (just let it sit on the radiator opening, without turning it).
2. Have fresh coolant ready to pour in. Start engine, and raise engine RPM to somewhere around 1200 to 1500 (I use a washer or folded paper under the throttle stop). Turn up the heat and turn on the blower as well.
3. Watch the temp guage, and as it approaches the thermostat rating, take off the cap. As soon as the thermostat opens, you will see the water level drop. Top off the radiator with coolant, and replace the cap (tighten it down), and your done.
Plasticman
Last edited by Plasticman; Mar 3, 2005 at 05:54 PM.
