Re: 89 100, coolant temp sensor

[Andrew Duane USG/PE <duane@zk3.dec.com>]

Hairy green toads from Mars made David Conner say:

> The coolant temp gauge in my 89 100 has been erratic for a long
> time...mostly not working at all, with intermittent mood swings where it
> will decide to tell me the temperature.
> I assume this is due to the often discussed coolant temp sensor having "gone
> south".
> 
> Where is the sensor for the gauge?  There seem to be three to choose from.
> Is it the one in the radiator below the lower radiator hose?
> If so, it looks like I'll have to remove the radiator hose to get it out,
> draining the coolant.
> What are the odds it's just crudded up and needs to be cleaned?

BTDT, got the t-shirt.

The sensor in question is on the metal coolant pipe that comes out
near the top of the head, about 2 cylinders back. It takes about
two minutes to remove it, and there should be little or no loss
of coolant. Hint: wait until engine is COLD to do this.

If the guage reads either 0, or correct, shifting between the two
every week, day, or 5 minutes, this is the sensor.


-- 

Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Digital Equipment Corporation		(603)-881-1294
110 Spit Brook Road
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too heavy to care.