X-Fan Thermostatic Size for NAS D90 - Defender Source
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Old May 8th, 2016, 06:49 PM
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Ryan Noonan
1994 D90 NAS #159
Join Date: Nov 2015
Location: Los Alamitos, CA
Posts: 94
X-Fan Thermostatic Size for NAS D90

Anyone here used the X-Fan thermostatic switch on their lower rad hose for a 3.9L? Not sure what size to get without draining the system and measuring... And I'd rather not do that till I have the part in hand.

I would guess-timate the 38mm size but I'd appreciate if anyone could throw down with their real world experience. I've emailed them and searched online/zee forums to no avail.

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Old May 8th, 2016, 08:41 PM
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El Solis
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Chris Solis
Camel Trophy 110 sorta :)
Join Date: Jan 2011
Location: Livermore, CA USA
Posts: 536
Not sure if this helps but I used calipers to measure the diameter of the hose and it worked well. Mine is a 200tdi so I can't help with size.
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Old May 8th, 2016, 08:59 PM
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1983 110 200tdi 3 door soft top
Join Date: Sep 2010
Location: San Jose, California
Posts: 2,852
I did the same, measured with caliper then bought a temp switch/sensor boss on ebay for about 7 bucks
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