Coolant and Oil Temps?
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Joined: Oct 2017
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From: Farmville Virginia
Coolant and Oil Temps?
I have a 1990 L98 so the only info I get is from the analog gauges. From everything I read here I believe my operating temps on both oil and coolant may be low (according to the needle gauges).
Coolant runs around 140 to 150 on open road although it will rise to 240 +/- in traffic.
Oil temp never rises above 140.
I'm not overly concerned about the high coolant temps in traffic, I've read a lot here about it and it seems fairly normal.
My main concern is low oil temps. Is this normal? If not what is the cause and what steps should I take to fix it?
Thanks in advance guys!
Coolant runs around 140 to 150 on open road although it will rise to 240 +/- in traffic.
Oil temp never rises above 140.
I'm not overly concerned about the high coolant temps in traffic, I've read a lot here about it and it seems fairly normal.
My main concern is low oil temps. Is this normal? If not what is the cause and what steps should I take to fix it?
Thanks in advance guys!
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Your analog gauges will give you inaccurate reading, so dont rely on them. They are really more of a guesstamet than anything.
You oil is most likley much hotter than your innaccurate gauge will show. I'd really not worry so much about that piece of your puzzle as it is pretty difficult to have oil that is too low in temp. . You can pull super accurate temp reading from your DIC display on your cluster. Pull out your shop manual as it will show you what your engine temps are doing and then you can "calibrate" your sense of analog guages as to what is "normal."
You oil is most likley much hotter than your innaccurate gauge will show. I'd really not worry so much about that piece of your puzzle as it is pretty difficult to have oil that is too low in temp. . You can pull super accurate temp reading from your DIC display on your cluster. Pull out your shop manual as it will show you what your engine temps are doing and then you can "calibrate" your sense of analog guages as to what is "normal."
Melting Slicks
Joined: Oct 2016
Posts: 2,024
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From: Central Alabama
Team Owner
Joined: Sep 2003
Posts: 25,394
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Coolant temp on a '90 with only C68 diagnostics.
For the OP I'd think if there's no C68 I'd get temps confirmed using a 'scanner'. If C68 then check but 'maybe' do a ECT/CTS as pure maintenance. Using the analog CTS for the gauge resistance could be measured for possible checks on temp.
