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01-02-2016, 12:40 AM
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#1 |
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Registered User
Join Date: Sep 2012
Location: SoCal
Posts: 529
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5.3 coolant temps
what is optimal for coolant temps?
im currently running around 185 while on the freeway at 70 mph then around 190-200 while in stop and go traffic |
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01-02-2016, 01:23 AM
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#2 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: 5.3 coolant temps
Thats shoukd be fine the ls tend to run around 210 stock. Mine runs around 200 all the time
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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01-02-2016, 01:49 AM
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#3 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: 5.3 coolant temps
"optimal" to the GM engineers is 195-215 in terms of efficiency as measured by fuel useage vs manifold pressure... i.e. thats when the engine will make the most power off the least fuel. This is why you'll see LS powered vehicles running 15-30* hotter than the old SBC stuff.
Its also why I yell at people who run 160* stats. Because the engine is meant to run warm, your actually sacrificing power, efficiency, and longevity by doing so. Your temps sound fine. I've seen logs from AZ/TX/NM guys who have been 220-225* without the engine knocking or pulling timing. With a good cooling system,and no other mechanical or tune related factor, you can actually worry about other heat related concerns (trans) before you legit over heat these.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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01-02-2016, 11:32 AM
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#4 |
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Registered User
Join Date: Sep 2012
Location: SoCal
Posts: 529
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Re: 5.3 coolant temps
awesome thanks for the quick responses guys!
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01-03-2016, 12:42 AM
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#5 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: 5.3 coolant temps
Agree with the rest....my fans switch on @205- off @ 195. Sounds like you are good on it ....longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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01-03-2016, 03:06 AM
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#6 |
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Registered User
Join Date: Jan 2010
Location: Loveland, CO
Posts: 1,921
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Re: 5.3 coolant temps
Mine runs 200 all the time, stop & go traffic in summer it can reach 210-215 but it cools down quick when the fans come on. And that is with a 195 thermostat.
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Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB |
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01-03-2016, 01:09 PM
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#7 |
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Registered User
Join Date: Nov 2012
Location: West Des Moines, Iowa
Posts: 450
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Re: 5.3 coolant temps
Several stock tunes don't turn fans on until well into the 220's.
You're fine, don't sweat it...harharhar...
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64 Biscayne - 230/PG, Accuair E-Level, 18/20 Bonneville C's. 68 Charger R/T - #'s matching 440/auto car, 499/727/3.91. 68 GTX - 440/4-speed, Dana 60. 44,000 miles. 71 SWB C10 - LQ4+S476r 06 Duramax - LBZ - Exhaust, EFI Live, etc... |
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