J. Sweet: source for temp sensor?

Re: 92 740 turbo wagon B230FT.... dash temp gauge.....

I pulled off the eng. coolant temp sensor conn. and jumped it....the
gauge then went full-scale, so that shows that there is no abnormal
external resistance. It may not be the normal failure mode for a
thermistor...but apparently that is what is bad.

Who has it for $20.00? Rockauto.com was recommended to me as a cheap
place to get Volvo parts, but I seem to recall pricing new sensor at
$40.00

Also, I found out from the brother that he removed the thermostat.
The car has been running only about 185 F or so, as the weather is not
hot yet. So I am wondering if the engine could be running open-loop
all the time, and so using a lot more gas than normal? But I don't
have the exact number on when (what temp) the ECU switches to
closed-loop. I think the normal range of temps is 195-210, right?

Is there some slight change in idle speed or something to show that
the ECU has switched to closed-loop?


thanks, geronimo

 

FCP Groton, part number 1362645

It's an aftermarket part, but for something like the guage sensor, it
wouldn't bother me to use one.

 

James, thanks....got a new sensor coming from FCP groton.

Question is, how is the old one removed from the block? You can't get
a deep socket on it, as the plastic connector body is wider than the
metal hex-part. there is no clearance for a wrench either. Whatever,
it looks like the intake manifold has to come off in order to remove
it.

It looks like the only way is to either break the plastic conn. part
of temp sensor off, or does it disconnect somehow? Obviously it can't
screw in/out of the sensor body as you would be twisting the wires up.

And this is the forward one...one that you can easily get your hand
on!

Thanks, Geronimo

 

Unbolt the intake manifold, pull it out of the way, and use a 19mm box end
wrench, it'll come right out. It looks imposing, but it's only about 10
bolts to pull the manifold, you don't even have to remove the fuel rail,
just unbolt the manifold and tug it away far enough to get to the sensor.