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04-19-2009, 10:11 AM
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#1
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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engine temp
so i had my radiator replaced maybe a month ago and now im always lookin at the temp gauge when im driving around its about 180* which i guess is normal. but when i stop at a light it climbs up to 210*ish and if its a long light or im just idling after driving around a bit it climbs past 210* but not into the red. ive heard that when you play with the radiator somethings get messed up like the coolant sensor.
is this normal? or is it the thermo not opening all the way? a fan or both fans not working right?
any insight would be helpful
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1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick 
2014 2LT Cruze 2.0 Turbo Diesel
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04-19-2009, 10:20 AM
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#2
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Stock operating temp is like 220 or some absurd number like that. The fans come on at pretty high temps. Did you bleed the system correctly after installing the new rad?
If so, you can throw a 160* thermo in there and have a tune or get the SLP switch to turn your fans on earlier.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-19-2009, 10:25 AM
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#3
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Join Date: Mar 2009
Location: Paramus, NJ
Posts: 280
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i would let your car sit and idle for about 10 minutes with the hood up in your driveway. see if after it hits "normal operating temperature" that the fan/fans kick on for the radiator. for most f-bodies, the fans will turn on while driving under about 30mph, to keep the air flowing. higher speeds don't need the fan(s) because, obviously, there's air moving through the radiator. anyway, the point I'm getting at is that from the sound of it, yes, there might be a problem with one or both of your radiator fans--they might not be turning on at all, if you haven't noticed already. first thing i would check would be to see if they're plugged in right. sounds too simple, but it does happen XD. after that, I would check the water/temp sensor.
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<Tru2chevy> a little over 16 pedobytes of RAM
<Masonite> ...pedo?
<Masonite> you mean peta?
<Tru2chevy> ya
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04-19-2009, 10:27 AM
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#4
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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No, thats normal for the LT1, it makes less emissions in stop and go traffic or something like that when it runs that hot. As long as your not overheating it sounds normal.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-19-2009, 10:38 AM
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#5
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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it sounded normal to me too. i haven't been in my car in awhile so i forgot what it would climb to. i would just make sure the antifreeze is topped off.
i believe the only sensor you could mess up is the low coolant sensor a couple inches below the radiator fill.
Last edited by sweetbmxrider; 04-19-2009 at 10:39 AM.
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04-19-2009, 10:40 AM
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#6
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Coolant temp sensors are not on the rad, one on the WP and one on the driver side head, gauge and PCM respectively.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-19-2009, 10:44 AM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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thats why i said LOW coolant sensor 
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04-19-2009, 10:45 AM
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#8
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Yes, but HE did not, he just said "somethings get messed up like the coolant sensor".
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-19-2009, 11:26 AM
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#9
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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thanks for you help guys lol i thought i heard something about emissions and what not
the reason i asked is b/c my friends lt1 sounds like an industrial sized a/c when it comes on
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1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick
2014 2LT Cruze 2.0 Turbo Diesel
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04-19-2009, 03:56 PM
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#10
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Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,676
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Quote:
Originally Posted by Shownomercy
Coolant temp sensors are not on the rad, one on the WP and one on the driver side head, PCM and gauge respectively.
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Fixed
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John
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04-19-2009, 03:59 PM
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#11
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Join Date: Mar 2009
Location: Paramus, NJ
Posts: 280
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Quote:
Originally Posted by Shownomercy
Stock operating temp is like 220 or some absurd number like that. The fans come on at pretty high temps. Did you bleed the system correctly after installing the new rad?
If so, you can throw a 160* thermo in there and have a tune or get the SLP switch to turn your fans on earlier.
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after my post, I went out and drove my T/A around, and I have to agree with what Shownomercy has to say. I have a single radiator fan, and it would kick on at about 200-220 degrees while idle/low rate of speed. So, seems like yours is working normally.
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<Tru2chevy> a little over 16 pedobytes of RAM
<Masonite> ...pedo?
<Masonite> you mean peta?
<Tru2chevy> ya
<Tru2chevy> my friend had just sent me a pedobear pic
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04-19-2009, 07:28 PM
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#12
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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our lt1 cooling systems are a little different than yours but yeah, it seems ok.
his fans may be louder because the a/c fan is spinning at high speed. yours may be spinning at a lower speed or not at all. i'll double check at work tomorrow what one is for cooling and a/c. i'll also check the fan speeds.
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04-22-2009, 02:50 PM
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#13
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Make sure you don't have air trapped in the system. Most modern cars run a bit hot to reduce emissions- which is why thermostats (as minor a part as they seem) get the "off road use only" designation, because they effect emissions. If it bothers you, go to a cooler thermo. Make sure it's an LT1 specific unit.
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04-22-2009, 03:00 PM
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#14
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,151
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If you change the t-stat you have to reprogram the fans.
Just make sure both fans come on when it gets hot sitting there.
Your friends might be louder because he has a bad fan motor.
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04-26-2009, 10:26 PM
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#15
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Guest
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its normal, i was in traffic for 2 hours omw to boston last year and thought the car was gonna over heat. put the 160* in and it doesnt go above 180* now even at idle
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