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#1 |
Join Date: Jan 2003
Location: Modesto, CA
Posts: 1,321
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Idea on Coolant temp Sensor: Am I running THAT cold?!
My guage moves...but it seriously NEVER gets above the ¼ mark...I'm thinking maybe the sensor isn't the proper sensor my truck's guage...any ideas? I know I have a fan that runs all the time (belt-drive) but I mean, c'mon! With hot weather and 12º initial timing, SHOULDN'T it at least get to the half-way mark?!
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#2 |
Account Suspended
Join Date: Nov 2002
Location: Winnipeg, Manitoba, Canada
Posts: 798
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I've had similar symptons on other vehicles when the thermostat went. They typically malfunction in the "open" position allowing coolant to flow freely as soon as the water pump is turning (avoids overheating from a "closed" thermostat). Since the coolant flows continuously, right from engine start-up, it takes much longer to reach operating temp - if it does at all.
Like I say, I've had this happen on some of my previous vehicles, with smaller engines. I don't know what our V-8's would do in this case. Just some thoughts. ![]() ![]() ![]() |
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#3 |
Registered User
Join Date: Oct 2003
Location: Chesapeake, VA
Posts: 726
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Mine's been doing that a bit, too, as of late. But, since I put a new thermostat in it a year or two ago, it's not likely the thermostat. I do know that I need to replace the electrical connector to the temp sensor, though. The plastic clip has all disintigrated away and just the metal clip remains-- exposed to all the elements and such. Perhaps I even need a new temp sensor-- it is the original, you see.
The way I judge whether the engine is getting up to temperature or not is through the cabin heat-- if the heat isn't in the engine, it surely won't be blowing through your dash vents! ![]() Good luck! Kevin
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Semper Paratus |
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#4 |
Registered User
Join Date: Feb 2004
Location: Hodgenville, Ky
Posts: 735
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When I used the factory gauge, it rarely got above the 3/8 mark, and that was in 29 Palms, CA during the summer. May want to borrow a IR thermometer to see how warm things really are.
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#5 | |
Join Date: Jan 2003
Location: Modesto, CA
Posts: 1,321
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#6 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Mine was the same way, put a new thermostat in, and now it sits just below the halfway mark
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#7 | |
Join Date: Jan 2003
Location: Modesto, CA
Posts: 1,321
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#8 |
Registered User
Join Date: Oct 2002
Location: Edmond, OK
Posts: 5,906
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mine has always run just about the 1/4 mark... or the first mark on the gauge anyways. heck i thought that was normal, if it gets above that i worry. even with new thermo and 2 different engines...
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Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call |
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#9 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Mine almost hit the 1/2 mark, and it had me pulling over to check it out. Nothing wrong that I could see, I didn't want to top the rad cap to make sure I wasn't running low on coolant, it soon dropped down a bit to a bit normal of a level, so I guess I'll check the rad after school and make sure she isn't loosing coolant again.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#10 |
Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
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Both my 75 and 79 were just like that. The 75 runs cold on the trail. If it's 90's and I'm floging it and not really moving I might see near 3/8 if the gage.
The 79 with the A/C on would just hit half way if idling in traffic. Both had a 180 degree thermostat in them. My 88 burb runs strait up almost all the time. strait up is marked on that truck as 210.
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Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
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#11 |
DAMN, I love Big Blocks!
Join Date: Aug 2003
Location: New Mexico, USA
Posts: 619
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My truck runs slightly less than the 1/4 mark, even towing during the hot New Mexico summers. 180 degree thermostat and four core rad likely have something to do with that, though.
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Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear. ![]() |
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#12 |
LED King
Join Date: Jan 2003
Location: Sacramento, CA
Posts: 2,088
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My truc runs slightly above the 1/4 mark. It almost hit the halfway mark when it started to overheat. That is when it dieseled when I turned it off.
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Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32 |
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