Just wondering who has tried a 205 deg F thermostat and how well it has worked through summer?

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U.S. Army Retired

Subscribed. I would like to know as well.


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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Especially if you have towed heavy up grades

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05 CRD: H.D.S2 stat,WW Ironrock trilink&LCA's, OX rear,ARB front, 4.10's, ARB bumper, Suncoast,OME 3.5, JBA UCA,rock rails, Moabs&265/75 Duratracs, GDE tunes ,FFD fan,ARP's, 2 micron fuel, new valves,sasquatch battery tray & grid heater, tensioner relocated
Mech fan, VH & AC delete

Sorry I can't offer any experience with using a 205 degree thermostat. I have turbodieselfreaks thermostat housing and using the supplied 201 or 202 degree thermostat. No issues over ~10,000 miles of use (I have not towed with it). I would be a bit concerned with the electric fan kicking on as I understand it runs when coolant temp hits about 203 degrees? This would be detrimental to efficiency.

Close enough
thanks

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U.S. Army Retired

I don't know of any 205 deg thermostats available but I'm also running the TDF machined stat with the included 203 degree unit. According to Stant, it should start to open at 203 ±3 degrees, and I find that to be accurate. It cycles between 197 and 201 or 203 as I'm driving and watching Torque Pro. It should be fully open at 15-20 degrees above rated value. http://www.stant.com/index.php/english/ ... ermostats/

I haven't towed anything with it installed but last weekend I drove up to the mountains fully loaded with 3 people and camping gear. AC was blasting and we were pushing it up a mile long winding grade at 30-35mph. Maximum coolant temp hit 211F, which is not concerning to me.

But running a thermostat with that high a rating, you need to be thinking about if your fan clutch will be starting to engage all the time just during normal driving, robbing efficiency. I'm doing some testing right now to log that, since my Hayden clutch is supposed to start engaging at 170F.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

That's CA 170 f based on air temperature off radiator stack

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Yes exactly. I'm finding that at 210F water temperature, air temperature off the stack is 190F.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.