Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Engine Performance/Intakes/Exhausts

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #25  
Old 09-27-2011, 10:17 AM
WK2 Rover's Avatar
Premium Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2010
Location: San Francisco Bay Area
Posts: 255
Thanks: 2
Thanked 7 Times in 5 Posts
Rep Power: 1782
WK2 Rover is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

I had put a thermostat in my Corvette that started the cooling system at 160 degrees instead of 195 degrees, and it made a performance difference. The Grand Cherokee doesn't seem to mind the heat, although the engine compartment does get very hot.
__________________

__________________
JEEP 3: 2011 Grand Cherokee Overland 4x4, Hemi V-8 with MDS, Multi-speed Automatic with ERS, Quadra-Drive II with Rear ELSD, Off-Road Adventure Group II, Selec-Terrain, Quadra-Lift, Towing Group IV, Advanced Warning & Adaptive Cruise Control, Bright Silver Exterior with Beige Leather Interior
MODS: All-Terrain tires, Passenger-side "Trail Rated" Badge, "5.7L" and "Hemi" Badges, "70th Anniversary" Badge, Mopar Cold Air Intake, Custom Engine Cover, Chrome Fog Light Bezels, Bright Pedals, Illuminated Door Sills, WeatherTech in front / back / cargo / license plate frame, Mopar Roof Rack, Thule Ski Rack, Thule MOAB Cargo Basket
JEEP 4: 2014 Cherokee Trailhawk 4x4, 3.2 liter V-6, 9-speed Automatic with ERS, Active-Drive II with Rear ELSD, Technology Group, Comfort Group, Cold Weather Group, Granite Exterior with Brown Interior
Reply With Quote
  #26  
Old 09-27-2011, 11:13 AM
Member
 
Join Date: Mar 2011
Posts: 499
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 31693
77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute
Re: WK2 GC - Reducing Hemi Engine temp

I have had a fair amount of cars over the years and this new Jeep is by far the hottest. On short stop and go trips to different stores, the fan never turns off. Not that I care too much but the fan does get annoying at times, and I live in Pittsburgh where it's not even hot all that much. I would be pissed if I lived where it was warm all the time.

Does the engine compartment really need to be sealed up like a waterproof box though? Water and mud on the outside never hurt any of my other engines. I guess it could be to keep noise down but I like the noise an engine makes.
__________________

__________________
Reply With Quote
  #27  
Old 09-27-2011, 07:59 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jul 2011
Location: Phoenix, az
Posts: 181
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 1432
Kevlars has a reputation beyond reputeKevlars has a reputation beyond repute
Re: WK2 GC - Reducing Hemi Engine temp

I live in Phoenix and its been over 100 for the last month with some stops in the 115 degree range ... and my jeep has been fine. Coolent temp around 208 to 215 degrees F. Does the fan turn on -- ya .. but you cant hear it from inside the cab. I have not noticed any issues with the extreem heat. Even off roading last week ... the temperature was rock solid at 208 with several extened stops waiting for other people to clear the course. Just my experience.
__________________
Reply With Quote
  #28  
Old 09-28-2011, 05:56 AM
Member
 
Join Date: Mar 2011
Posts: 499
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 31693
77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute77rednecktruck has a reputation beyond repute
Re: WK2 GC - Reducing Hemi Engine temp

Quote:
Originally Posted by Kevlars View Post
I live in Phoenix and its been over 100 for the last month with some stops in the 115 degree range ... and my jeep has been fine. Coolent temp around 208 to 215 degrees F. Does the fan turn on -- ya .. but you cant hear it from inside the cab. I have not noticed any issues with the extreem heat. Even off roading last week ... the temperature was rock solid at 208 with several extened stops waiting for other people to clear the course. Just my experience.
You can't hear the fan? It sounds like a Cessna taking off when i have the windows down. Maybe I need a new fan or something.
__________________
Reply With Quote
  #29  
Old 09-28-2011, 09:27 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Jul 2011
Location: Phoenix, az
Posts: 181
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 1432
Kevlars has a reputation beyond reputeKevlars has a reputation beyond repute
Re: WK2 GC - Reducing Hemi Engine temp

Ok now I understand ... lol when its 109 degrees outside we dont lower the window.... ha ha ha
__________________
Reply With Quote
  #30  
Old 09-28-2011, 10:12 AM
fireron's Avatar
Premium Member
 
Join Date: Jan 2011
Location: Phoenix, AZ area
Posts: 285
Thanks: 27
Thanked 5 Times in 5 Posts
Rep Power: 1691
fireron is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

77 did you have the flash done for the Hemi where it states it helps with the extra loud engine fan noise? I had this done on mine and it made a huge difference. The TSB is (21-008-11) a search will bring it up on WK2 Jeeps: http://www.wk2jeeps.com/tsb/tsb_wk2_1803511.pdf

This might help. Good luck.
__________________
Reply With Quote
  #31  
Old 09-28-2011, 06:25 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: Jeddah - Saudi Arabia
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1226
Hasan is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

guys
today I removed the plastic engine cover , the engines looks nice after all , how ever after I did that started to notice the hot air - steam coming out of the engine vents much faster & at noticeable rate which looked nice & circulate hot air out much faster
__________________
Reply With Quote
  #32  
Old 09-28-2011, 11:36 PM
Member
 
Join Date: Sep 2010
Posts: 104
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1648
Kev- is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

Steam? If your engine is steaming, then that's a bad, bad sign. If you just mean the visual effect of very hot air distorting the light, then that's fine but isn't steam :P
__________________
[O|||||||O]
Reply With Quote
  #33  
Old 09-29-2011, 09:14 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: Jeddah - Saudi Arabia
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1226
Hasan is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

your correct , my bad
__________________
Reply With Quote
  #34  
Old 09-29-2011, 09:15 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: Jeddah - Saudi Arabia
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1226
Hasan is on a distinguished road
Cool Re: WK2 GC - Reducing Hemi Engine temp

lets call it a mirage
__________________
Reply With Quote
  #35  
Old 09-30-2011, 11:46 PM
Member
 
Join Date: Aug 2011
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1227
ron13 is on a distinguished road
Talking Re: WK2 GC - Reducing Hemi Engine temp

I also took the engine cover off and now it hangs on the den wall. It CAN'T help ambient air circulation inside the engine compartment whatever that may be.
My temp gauge shows movement under harsh conditions which I do not like, and I have the tow package with heavy duty cooling. I have been following this thread with interest. Thanks Scottina for ur intervention.
The thermostat determines at what temp coolant starts to flow into the engine. So the higher the thermostat value, the hotter the engine will always run. Thermostats started getting hotter to help with emissions. Heat is the enemy of ALL machinery, simple friction and thermal expansion. There is an "ideal" (stoichiometric) air/fuel ratio for engines and I am sure there is also an ideal temp at which an engine will produce best POWER. Note that today the emphasis is not on power, but EMISSIONS. Personally I like a 180 thermostat with a fan that comes on EARLY enough to keep it there. Hypertech offered this exact option with all its programmers, for GM cars anyway, so I'm not just blowing this through my kazoo.
__________________
Reply With Quote
  #36  
Old 10-01-2011, 02:38 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: Jeddah - Saudi Arabia
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1226
Hasan is on a distinguished road
Re: WK2 GC - Reducing Hemi Engine temp

ron 13 ,
I am a big believer of what you’re saying specially if you live in hot environment like mine I petty all engines that work in such weather , i am going for thermostat but didn’t decide which one as I am still looking plus I am ordering the oil coolers with auxiliary fans beside the hood vents I made , I will see what happens & update you guys
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Normal temp after shutting off Hemi apehead Grand Cherokee - WK2 - 7 09-18-2012 07:23 PM
VVT Hemi engine finrisk Engine Performance/Intakes/Exhausts 2 05-20-2011 12:01 PM
Engine Temp Varies 5.7L Bob WK2 Trouble Shooting/Problems/Service 6 12-30-2010 10:03 AM
Engine Temp????? ernieburn9 Grand Cherokee - WK 5 09-05-2010 09:11 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.