Thermostat 160 vs 195 - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-30-2009, 06:54 AM   #1
Newb
 
Join Date: Jun 2009
Location: Florida
Posts: 4
Arrow Thermostat 160 vs 195

Anyone here reduce their thermostat from the manufacturer spec of 195 to 160 or 180? What are the pros and cons. If you look at my other question, you will see my problem and understand why I am asking. I have an over heating problem.

dreider is offline   Quote
Old 06-30-2009, 07:06 AM   #2
Jeeper
 
buckshot500's Avatar
 
Join Date: Mar 2009
Location: Carolina
Posts: 798
I have recently been convinced to use the 195 degree T-stat.

If an engine runs too cold, the fuel/air mixture can separate & allow raw (condensed) fuel into the cylinders. This leads to cylinder wall "washing".

The protective oil coating on the cylinder walls, gets diluted & rinsed away by the solvent action of the gasoline.

This all causes premature engine/ring/cylinder wall wear.

This is also why it's good to warm an engine up for a few minutes, even in a hot climate such as Florida.

Just got back from Boca Raton yesterday. It is damn hot down there!

Nice beaches though.

__________________
90YJ 98XJ
buckshot500 is offline   Quote
Old 06-30-2009, 07:16 AM   #3
Jeeper
 
jpdocdave's Avatar
 
Join Date: Mar 2008
Location: beach park, il
Posts: 8,162
the only way i would do it, and have is on a vehicle that doesn't have to pass emissions tests, and doesn't get driven all the time, and is older. otherwise, stay w/ 195. esepcially on obd2 cars. i did 180 on my mj, but i'd never go below that either.

also, if you have an overheating issue, simply changing thermostats to a different temp is not the answer. if your 195 t stat is working properly it is not the problem.
__________________
"The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their president."
http://mybroadband.co.za/photos/data...re_cowbell.gif
jpdocdave is offline   Quote
Old 06-30-2009, 07:53 AM   #4
IITYWTMWYBMAB

WF Supporting Member
::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 10,833
Which engine do you have? on TJ's they run at 210-215 all day long with the 4.0l. Sounds like you have replaced just about everything you can from reading the other thread. Could be an internal issue of some kind perhaps, or maybe just the gauge.
__________________
79.96.85.00.01.97.00.97.93.97.95.94
CJ.XJ.CJ. TJ. TJ.ZJ. TJ.TJ. ZJ.ZJ.YJ. XJ
4Jeepn is offline   Quote
Old 06-30-2009, 08:11 AM   #5
Newb
 
Join Date: Jun 2009
Location: Florida
Posts: 4
Yes, I have a 4.0. I will see today, but it just makes me nervous with the gauge always getting close to the red, and before it would just keep going and overflow out the reserve. I definitely think I missed it when I flushed the radiator and then went from there. I should have seen the temp on the radiator. Costly mistake. At least now the temp goes up and then drops like it should.
dreider is offline   Quote
Old 06-30-2009, 09:17 AM   #6
Hacks off Parts while Lit
 
whitebuffalo's Avatar
 
Join Date: May 2005
Location: The Sandhills of South Texas
Posts: 2,290
i run a 180 in mine. i like a little bit of room on the hot side of the gauge.

i was having heating issues on mine before, so i changed radiators, water pump, and went to a 180 tstat. runs good now.


also, fwiw, on my 360 Ram, i ran a 180 to keep it from pinging on 87 octane. every five degrees in t-stat reduction is about like 1 octane boost. on the Ram, anything lower than 180 would set a code. i didnt go lower on my jeep because i saw no need.
__________________
'90 YJ, ford 8.8, SOA, lincoln front, aussie rear, 4.88s, swampers.
whitebuffalo is offline   Quote
Old 07-07-2009, 01:31 AM   #7
Jeeper
 
Join Date: May 2009
Posts: 23
Quote:
Originally Posted by dreider View Post
Anyone here reduce their thermostat from the manufacturer spec of 195 to 160 or 180? What are the pros and cons. If you look at my other question, you will see my problem and understand why I am asking. I have an over heating problem.
run as hot as you can stomach. 180 is a min in my mind. any lower than that and you can start 'coking' up the engine and not heating up oil enough to steam out the moisture. a lot more acid reactions and such.

new cars are running 220 and higher.. some for smog reasons... im a trad hot rod guy w/no FI or computers... 180 is nice for less pinging and i have a better margin of heat.

ccpanel is offline   Quote
Reply

Tags
overheating , thermostat

Thread Tools

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
Thermostat replacement opinions Ej132 TJ Tech Forum 4 06-22-2009 07:02 AM
Engine hot spots: questions about thermostat, spark plugs KTC YJ Tech Forum 4 06-06-2009 06:49 AM
thermostat yj4x4 YJ Tech Forum 1 11-10-2007 06:50 PM
90 wrangler 2.5 tbi thermostat houseing mustang03282 YJ Tech Forum 5 09-25-2007 09:27 PM
which thermostat George T. General Jeep Discussion 7 09-20-2007 11:25 AM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 11:29 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC