Just Cruising

"98 Z28 LS1", My low coolent light comes on but only after the thermostat opens. The overflow is also full. Is this a bad sensor or maybe air in the cooling system ???

LS6427

iTrader: (2)

Most likely a bad sensor, they suck.

But if your over flow rfeservoir is getting filled up you need a new cap.

If you are getting air into the system, your coolant would boil over and you would over heat pretty fast.

Just Cruising

The overflow just sits at the full mark. The engine always runs cool.
How do the sensors come out?

Just Cruising

Also would you replace sensor with factory or try someware like napa ?

LS6427

iTrader: (2)

If its a bad sensor, go to: www.rockauto.com They have AC Delco and aftermarket ones.

There's a metal clip that holds them in place. Go to that website and look at the pics and you will see how the clip works. It comes off very easily.

As far as it coming on after the t-stat opens, you could have some air in there. Just top it off after it opens and starts to flow. Wait for it to close and then open again, and top it off again. That should do it.

Just Cruising

Thanks for the help. Will try toping off first tomorrow and if that doesn't work will order new sensor.

LS6427

iTrader: (2)

You could just unplug it too, if the light bothers you. Thats what I did with my 1998 T/A when the sensor went bad a few years ago.

bjamick

iTrader: (31)

Yep just a sensor, those stupid things are always going bad, but are very easy to get to thank god.

Just Cruising

One more thing. Will fluid come out when I pull the sensor ?

SOMbitch

iTrader: (8)

Yes. it is the ps end of the radiator a couple inches down from the top.

Slvr00Bird

iTrader: (2)

LAWL at attempted "coolant" spelling..