Engine Running hot and driving me crazy

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KRUISR

5 Year Member
Apr 16, 2015
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I agree with the General, the factory gauge is a best guess. I would take a temperature reading on the driver side rad tank (metal part). That would be your best info.


View: https://www.youtube.com/watch?v=2P7MDRXmfI4&t=6s


The start of the video my fans had automatically triggered (205 *F), you will see where my gauge is reading.
 
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91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
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North East
Removed the factory 195 degree thermostat and installed a high performance 180 and she runs super cool now. Notch below the middle.
 

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KRUISR

5 Year Member
Apr 16, 2015
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Mine is on the R...Could this be OK, and normal.
That's where mine is (in the video above). Mine used to be at the M, but after I put a new temp sensor on normal moved up to the R. I am using a 180 T-stat.
 

91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
333
165
53
North East
Mine is on the R...Could this be OK, and normal.
Sure. “R” Seems to be where most are at. Mine was at the R all the time and was always fine. I always kept one eye on it though where as the new reading, on the A, makes me feel a lot more comfortable.
 

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Potomus Pete

Gretchen Whitmer is eating at me
Mar 7, 2019
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Mine used to be on A until I put a new temp. sensor. Then it jumped up to R after the new sensor. So who knows what the real reading is
 

91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
333
165
53
North East
Mine used to be on A until I put a new temp. sensor. Then it jumped up to R after the new sensor. So who knows what the real reading is
100% right about that. Accuracy of the gauges... who knows!?!??! Now ya have me thinking... ok, not going down that rabbit hole. Lol
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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I don't understand, why guess, put a mechanical or electric temp gauge in, you can mount it to the bottom of the dash or a pillar pod and know what temp the engine is running, and keep the factory gauge.
 

Potomus Pete

Gretchen Whitmer is eating at me
Mar 7, 2019
2,439
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Sarasota Florida
If it's getting above average hot you will smell/feel it. I have a Moroso radiator cap with a thermometer on it. Always interesting what that reads. Usually a lot less
 

91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
333
165
53
North East
In relation.... let me ask this..... when your cold, is your coolant in the bottle actually up to the “full when cold” line and when your hot, is your coolant up to the “full when hot” line????
Mine never is... either way... it’s always way down under the cold line regardless if she’s hot or cold and I’m not low on coolant.... same or different for you guys?
 

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Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
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I don’t have a stock bottle anymore, but when I did, i would top the bottle off to full hot when the motor was warmed up. It would them drop down but i would never pay attention to that level.

I typically do this to all my cars and adjust overflow level so it’s even with full hot when motor is hot.
 
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91AOD5.0LX

I have a slight sag in my rear
Feb 20, 2021
333
165
53
North East
I don’t have a stock bottle anymore, but when I did, i would top the bottle off to full hot when the motor was warmed up. It would them drop down but i would never pay attention to that level.
I typically do this to all my cars and adjust overflow level so it’s even with full hot when motor is hot.
Ok thanks for your input. I’m always tempted to add and bring it up to where it should be but then at the same time wonder if that’s not accurate either (the line) and figure leave it alone if there are no issues... maybe i should bring it up to the hot line then.... was curious about others so that’s for your comment on this.
 

Dan02gt

10 Year Member
Mar 2, 2003
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I have the factory 195* thermostat and mine sits right on the A when warmed up. When I read the engine temp via the ECT using my Quarterhorse the A is ~185*.
 
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Boostedpimp

15 Year Member
May 8, 2003
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I'm a fan of underdrive pullies. I daily with them but I feel you need a decent electric fan and alt upgrade to use them otherwise they'll bring to light any charging system or cooling system weaknesses you may have if any.
 

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Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
37,328
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Massachusetts
I’m not opposed to U/D pullies at all if your cooling and charging system is robust.

And I’ll probably be installing a set shortly as I drank a weee bit too much the other day and ordered a 93 cobra pulley set, which is 11% underdrive (typically most sets are roughly 25%)
 
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