Coolant Temperature
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Joined: Feb 2008
Posts: 92
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Coolant Temperature
I know this has been discussed, and I've spent time in the search mode, but I subscribe to the KISS principle & really would appreciate some simple step-by-step help.
'92 LT1 Analog coolant temperature does not move (remains cold)
Digital coolant temperature reads 207 +/- & fluctuates regularly.
What is not working? & if it is the sender on the right bank of the engine at the back, how the heck do I get to it???
Part numbers or specific technique would really be appreciated.
'92 LT1 Analog coolant temperature does not move (remains cold)
Digital coolant temperature reads 207 +/- & fluctuates regularly.
What is not working? & if it is the sender on the right bank of the engine at the back, how the heck do I get to it???
Part numbers or specific technique would really be appreciated.
Race Director
Joined: Dec 2006
Posts: 10,383
Likes: 4
Easy peasy...
It is between and at the same height as spark plugs #4 and #6
This is a pic of an F-Body but the location is the same.
Resistance values at various temps are in the FSM for testing just ohm it and look at the chart.
It is between and at the same height as spark plugs #4 and #6
This is a pic of an F-Body but the location is the same.
Resistance values at various temps are in the FSM for testing just ohm it and look at the chart.
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Thread Starter
Advanced
Joined: Feb 2008
Posts: 92
Likes: 0
TWCZ71 - A picture is worth a thousand words & better if applies to '92 +/-.
I looked at the pic posted & figured I was just not getting it. Glad it wasn't only me.
If it's the sensor on the passenger side between the last two spark plugs nearest the firewall, that's a real pain to get to.
Probably easiest to ground the wire at the sensor, I assume with the key on? This isn't going to mess things up worse is it?
Thanks for the feedback.
One last clarification please: Does the digital temperature gauge read from a different sensor? Because it DOES work!
I looked at the pic posted & figured I was just not getting it. Glad it wasn't only me.
If it's the sensor on the passenger side between the last two spark plugs nearest the firewall, that's a real pain to get to.
Probably easiest to ground the wire at the sensor, I assume with the key on? This isn't going to mess things up worse is it?
Thanks for the feedback.
One last clarification please: Does the digital temperature gauge read from a different sensor? Because it DOES work!
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Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Sensor is a thermistor meaning that the hotter it gets, the less resistance so more of the signal voltage - from the dash - reaches ground. That voltage drop is proportional to temp. Open or full voltage at the gage is cold. No voltage - or signal to ground - is max. Testing it doesn't harm anything. In fact, if it isn't plugged in, you all ready know those results. And yes, start by unplugging/grounding at the Sensor so that you can rule-out wiring and the cluster.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Another case of where GM did 'F' body and "Y" body cars differently.
LT1 Vettes have two.
One's in the front of Water Pump which is the digital sender and is also the one the PCM uses.
The other one is for the analog gauge and is in the passenger side head back toward the rear of the head between 6 and 8. It's relatively easy to access; I changed to a new on my son's 96 a few months ago.
The head hole in the driver's side head, toward the front (1/3) takes a pipe plug; nothing, other than the plug, installs there.
I just looked at his stock LT1 heads sitting beside my fireplace (the ones I removed when I installed his new Darts) just to be sure there'd be no confusion here.
Word of caution: Be very careful when changing the one in the Water Pump; the idler pulley can hit it when relieving the pulley's spring pressure and it'll break the sender.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!
LT1 Vettes have two.
One's in the front of Water Pump which is the digital sender and is also the one the PCM uses.
The other one is for the analog gauge and is in the passenger side head back toward the rear of the head between 6 and 8. It's relatively easy to access; I changed to a new on my son's 96 a few months ago.
The head hole in the driver's side head, toward the front (1/3) takes a pipe plug; nothing, other than the plug, installs there.
I just looked at his stock LT1 heads sitting beside my fireplace (the ones I removed when I installed his new Darts) just to be sure there'd be no confusion here.
Word of caution: Be very careful when changing the one in the Water Pump; the idler pulley can hit it when relieving the pulley's spring pressure and it'll break the sender.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!