The Official Extinct Inline Thermostat Mod Thread
Rock Crawling
Joined: Dec 2010
Posts: 463
Likes: 119
From: Heartland ‘Murica
you could have a different pulley machined to increase flow for the water pump unless the system is already maxed out in terms of flow through the motor. I had an oops summer issue on Friday it was roughly 95 ambient, ran into a buddys shop to swap some parts and ended up talking for a few minutes and I had the dogs in the truck so left it running with the ac going. The truck was running 217 and once I got moving dropped back to 199-203 but would start creeping up at stop lights as everything was already so heat soaked. Some e-fans would have helped immensely in this situation and might be something I need to look into as I can see them getting quite a bit of use off-road or heavy traffic situations.
Not terrible though. She’s still running cooler and consistent.
Last edited by Daytoman; Oct 20, 2021 at 07:38 PM.
Drifting
Joined: Sep 2021
Posts: 34
Likes: 6
From: Kansas
I just finished installing this mod tonight (180 tstat) and I was honestly shocked at the difference. I had replaced the thermostat when I bought it with a 180 deg factory tstat. On the factory I was seeing 193-204 temps (212 max when I had a bad fan clutch, since replaced). After my test drive I was seeing 174-188. Heat soaked sitting at idle was 188. I only saw 188 if I was coasting downhill in a headwind. Its not as "rock solid" temp as some say, but what a world of difference.
EDIT: So, this mod has been on for a few weeks now. During install I had found that my heater hoses were about to fail, so I hadn't stuck coolant in until I could replace those. Got those replaced and now I pretty much see 182 on normal highway driving. It may climb to 184 186 on a big pull up a hill and drop to 177 when the fan clutch kicks on. Idle on a hot day it might bump up to 188 to 190, that goes immediately down with a little rpm. The temp band has really tightened up. Also big bonus - I have for the first time since owning this rig gotten rid of the sloshing sound! First time I've been able to bleed all the air out of the system.
EDIT: So, this mod has been on for a few weeks now. During install I had found that my heater hoses were about to fail, so I hadn't stuck coolant in until I could replace those. Got those replaced and now I pretty much see 182 on normal highway driving. It may climb to 184 186 on a big pull up a hill and drop to 177 when the fan clutch kicks on. Idle on a hot day it might bump up to 188 to 190, that goes immediately down with a little rpm. The temp band has really tightened up. Also big bonus - I have for the first time since owning this rig gotten rid of the sloshing sound! First time I've been able to bleed all the air out of the system.
Last edited by thebilgerat; Oct 11, 2021 at 11:22 AM.
Camel Trophy
Joined: May 2016
Posts: 3,969
Likes: 859
From: Britainistan, UK
Hey Tim. I think I'm ready to pull the trigger and get your inline thermo mod mate.
I installed the black 180 degree thermostat 4 years ago and recently I noticed my temps creeping around 196-205 degrees even in cool weather here in England and having the Hayden/Dorman combo on my V8.
My temps usually sit around 178-185 sensed by my UltraGuage Blue but 4 years later, the temps are creeping up higher with that old school thermostat even with a coolant flush I did a year ago.
After looking at the options for the kit, I'm wanting the Re-usable silicone thermostat gasket for $11.00 but it's currently unavailable.
What is the difference between the silicone gasket and the Fel-Pro 35710 Rubber O-ring thermostat gasket for $5.50?
Cheers!
I installed the black 180 degree thermostat 4 years ago and recently I noticed my temps creeping around 196-205 degrees even in cool weather here in England and having the Hayden/Dorman combo on my V8.
My temps usually sit around 178-185 sensed by my UltraGuage Blue but 4 years later, the temps are creeping up higher with that old school thermostat even with a coolant flush I did a year ago.
After looking at the options for the kit, I'm wanting the Re-usable silicone thermostat gasket for $11.00 but it's currently unavailable.
What is the difference between the silicone gasket and the Fel-Pro 35710 Rubber O-ring thermostat gasket for $5.50?
Cheers!
Last edited by JUKE179r; Oct 19, 2021 at 02:52 AM.
Yes, had a bit of a supply chain issue with the silicone gasket that is now resolved. 1 in stock now with more coming later this week. The silicone gasket is much more user friendly than the o-ring gasket. You need to be very careful centering the thermostat if you use the o-ring.
Camel Trophy
Joined: May 2016
Posts: 3,969
Likes: 859
From: Britainistan, UK
Received in great condition to the UK via US Military Postal Service (USPS)! Now waiting on my mate to return from holiday so I can use his heated garage to install it. lol
Cheers Tim!
Cheers Tim!
Last edited by JUKE179r; Nov 19, 2021 at 03:12 AM.
Surprisingly you will be the only one in the UK with one. Just could not get the guys on the UK forums interested. One in the Netherlands, one in South Africa. We will see if the Aussies need any help as we head in to their summer.