Which thermostat for NAS 110 w/4.6 - Defender Source
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  #1  
Old January 8th, 2014, 08:59 PM
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Pete Gerbine, III
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Which thermostat for NAS 110 w/4.6

I have found info that says to use the 82* (defenderhelp.com) for stock NAS 110 but have also read to use the 88* and seems like there was a 9?* in there somewhere.

My temp. gauge goes up to just above the "C" and the heater is not blowing warm. I picked up an 82* at O'Reilly's and plan to stick it in tomorrow...unless I should get one of the others.

Any recommendations for a 4.6 NAS 110?

Thanks.
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  #2  
Old January 8th, 2014, 09:17 PM
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If you're in Texas I would take the tropical one, I think it's the black one but not sure.
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  #3  
Old January 8th, 2014, 09:33 PM
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Quote:
Originally Posted by Fred Lobster View Post
I have found info that says to use the 82* (defenderhelp.com) for stock NAS 110 but have also read to use the 88* and seems like there was a 9?* in there somewhere.

My temp. gauge goes up to just above the "C" and the heater is not blowing warm. I picked up an 82* at O'Reilly's and plan to stick it in tomorrow...unless I should get one of the others.

Any recommendations for a 4.6 NAS 110?

Thanks.
You want more heat and are going with the coldest thermostat ?
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  #4  
Old January 9th, 2014, 05:21 AM
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Tom Rowe
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Land Rover specifies thermostat to be fully open at 88c.
Most auto parts store systems specify a 195f for Land Rovers, which start to open at 90c.
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  #5  
Old January 9th, 2014, 08:37 AM
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I thought that the 82* might've been too low but that was what I found on defenderhelp.com and the O'Reilly guy said that was what it called for... I had also read about ill effects of running the wrong thermostat and don't want to jeopardize fuel consumption and the truck running badly for a little heat.

Has anyone messed with the "fail safe" thermostats? They apparently remain open if they go bad and there is no "rattle" pin/vent.

Thanks, again, for any help.
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  #6  
Old January 9th, 2014, 04:39 PM
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Julien Dalbin
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IMO they never open too soon on the 4.6, but I have over 70 F ambient temp all year long, so proper cooling is a priority.
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  #7  
Old January 9th, 2014, 07:40 PM
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http://landroverforums.com/forum/dis...rmostat-51327/

Here's what Stant says about fail safe thermostats.
Quote:
All thermostats will fail in either a closed or open position; there is no such thing as a thermostat that will fail in a “safe” position. Although some brands may claim a thermostat fails in a safe position, it simply locks itself open while it is in a full stroke open position. It will not spring open if it fails in a closed position.
Not going to say it can't happen, but of all the thermostats I've had that failed, they all failed when open.
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  #8  
Old January 9th, 2014, 10:14 PM
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I went ahead and exchanged the 82* for the 92*...the guy at the counter said the other guy was wrong....and they didn't have an 88*... When having the thermostat swapped out, there wasn't one in to begin with... Put the new one in and temp is going up and staying pretty much in the middle of the gauge so far. I am even getting a bit of warm air from my heater...though I may have some flap and vent issues, it at least was trying to blow warm air. Still a little concerned that there was no thermostat at all...
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  #9  
Old January 9th, 2014, 10:23 PM
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Pete, the factory gauges are a guess at best. I would invest in a VDO gauge setup if you are going to run a thermostat that hot in your area in the summer time. If you are going to switch back and forth then you should be ok.
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  #10  
Old January 10th, 2014, 05:38 AM
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I can't remember what O'Reilly sells, other than their house brand, but I've not had any luck with the house brand. Even their best one never lasted more than a year, then would fail. I'm only ever buying Gates or Stant anymore.
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62 88 Regular
67 109 6cyl NADA x2
74 Lightweight - The Antichrist
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97 D1 Automatic
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  #11  
Old January 10th, 2014, 06:42 AM
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Quote:
Originally Posted by Antichrist View Post
I can't remember what O'Reilly sells, other than their house brand, but I've not had any luck with the house brand. Even their best one never lasted more than a year, then would fail. I'm only ever buying Gates or Stant anymore.

The NAPA branded thermostat I just bought is made by Stant for what it's worth.
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  #12  
Old January 10th, 2014, 09:19 AM
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NAS 110 temp gauges have a "conditioner" inline and seldom read correctly. Either get a 90 gauge or a vdo but make the change.

http://www.defendersource.com/forum/...ad.php?t=26083
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  #13  
Old January 10th, 2014, 09:30 AM
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I put a thermostat in a a D1 that had just been replaced with a NAPA thermostat. The NAPA thermostat wouldn't stay in place, but the genuine one was a tight fit. I'm sure both function fine, but the Genuine seemed to fit a bit better.
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  #14  
Old January 10th, 2014, 10:59 AM
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The Stant gave the PN I mentioned is a snug fit.
If you look through their, or Gates') catalog at the dimensions, you'll find some very small differences between two that seem otherwise almost the same.
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Tom Rowe
Atlanta, GA

Four wheel drive allows you to get stuck
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62 88 Regular
67 109 6cyl NADA x2
74 Lightweight - The Antichrist
95 DI 5-speed
95 D90 5-speed
97 D1 Automatic
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  #15  
Old January 10th, 2014, 11:48 AM
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T Stat

I've got an NAS 110 with a 4.6 and installed and 88 degree thermostat. Manufacturer was Wahler, part number ETC 4765.
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