Author Topic: Coolant temp needle position  (Read 842 times)

poormansporsche

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Coolant temp needle position
« on: August 19, 2018, 09:30:53 PM »
I've always had an electric fan with a 3 row radiator out of four cyl Raider. So I've never seen where the needle should typically rest when the engine is up to operating temp. Middle? Above middle, below middle? I'm wondering if I'm running my engine too cold?

Thanks in advance.

cheers

poorman

MudRaider

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Re: Coolant temp needle position
« Reply #1 on: August 20, 2018, 07:20:02 AM »
I've always had an electric fan with a 3 row radiator out of four cyl Raider. So I've never seen where the needle should typically rest when the engine is up to operating temp. Middle? Above middle, below middle? I'm wondering if I'm running my engine too cold?

Thanks in advance.

cheers

poorman

Yes. On the 89, it runs just above the C line, maybe 2mm. On the 88 it sits just below 9:00 as the needle sits. And the 87 sat right at 8.00. So based on previous discussions, you use the normal setting as your norm. If it goes above that, you have an issue. To correctly check it, you'll need an infrared thermometer, available online for around $25, to get an accurate reading.

TOASTY

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Re: Coolant temp needle position
« Reply #2 on: August 20, 2018, 08:00:24 AM »
 The lower line for the V6 is 195-205 give or take a little on either side, it's a slow reacting gauge. The middle is 250ish.

MudRaider

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Re: Coolant temp needle position
« Reply #3 on: August 20, 2018, 07:34:17 PM »
The lower line for the V6 is 195-205 give or take a little on either side, it's a slow reacting gauge. The middle is 250ish.

Hmmm.250 seems high

TOASTY

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Re: Coolant temp needle position
« Reply #4 on: August 20, 2018, 08:29:23 PM »
 250*ish which is high, a smidge above the lower line maybe 3/16" is 220. At least on my truck with my IR gun pointed at the t-stat housing, I only know this because I was curious to learn the gauge after John had issues on the Sierras. The needle gauge is very slow and  accurate within 20ish degrees. The 4 cylinder may be different.

poormansporsche

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Re: Coolant temp needle position
« Reply #5 on: August 22, 2018, 10:25:28 AM »
Ta for that guys. I took your advice and bought a Fluke and shot the radiator hose after sitting in LA traffic for 45 minutes. The hose registered at 180-185 with the needle just shy (below) of the 9 o'clock position. This is a 91 with fresh OEM sensors.

cheers

poorman

TOASTY

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Re: Coolant temp needle position
« Reply #6 on: August 22, 2018, 04:40:50 PM »
 That's a lot different than what mine read, but i don't have a Fluke and i took a read on the thermostat housing. If you don't mind, shoot the housing for me for comparison. Bullworker's '89 reads about 9 o'clock and his has a custom aluminum radiator with electric fans at operating temp, I'll shoot his next time. Maybe i'll get a Fluke to match for science.

MudRaider

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Re: Coolant temp needle position
« Reply #7 on: August 30, 2018, 09:27:20 PM »
Man, I love all this science. ;D

TOASTY

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Re: Coolant temp needle position
« Reply #8 on: August 30, 2018, 09:49:43 PM »
 Did you see the one on the other forum with the thermal imaging?

KrzyDav

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Re: Coolant temp needle position
« Reply #9 on: November 15, 2018, 10:55:26 PM »
I picked up  an ifared reader gun from NAPA last spring. Tried to take readings and everything seems too cool.  I was blaming my cheap ass plastic aluminum radiator for being too  effiecient. Its probably my  jinxed skills with anything electronic and I'm not using it right.

plh

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Re: Coolant temp needle position
« Reply #10 on: December 03, 2018, 06:36:33 PM »
those 30 year old gages are reference at best.
83 Mighty Max SPX - 2.0l 4 speed. coming: ARB bumper, winch, OME 2" rear, Bilsteins, 4.90 rear locker, front LSD. 31x10.5R15
88 Raider: 4D56T, 5 spd, 4.62 LSD F & R, KYB G/A, T/L, OME Dakar Rear Springs, 33x12.5x15 MTZ, PLH L/Os, Dual Bouncies,
92 Montero RS M/T - SOLD!
93 Montero SR Auto 3.0 V6 33x10.5R15LT BFG T/A KO, KYB G/A, 4.88, ARB Bumper, Warn HS9.5k, New Heated Leather, Dual Bouncies
05 Montero LTD LT285/75R16 BFG T/A KO2, KYB G/A, OME Springs
http://www.tuffpans.com

MudRaider

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Re: Coolant temp needle position
« Reply #11 on: December 07, 2018, 11:02:59 PM »
those 30 year old gages are reference at best.

That's what I'm screaming!!!!!