My truck never seems to get over the 176 mark.....

_________________
2006 KJ CRD Ltd - Suncoast, GDE Eco, EGR Delete, After market T-Stat, Skid Row skids, V6 airbox, 2.5" Turbo back
2005 KJ CRD Sport-Suncoast, Transco, GDE Hot-GDE Trans, EGR Delete, Skid Row skids, V6 airbox, 2.5" Turbo back, After market S-Stat
1987 Suzuki LWB Samurai -diesel powered, custom 4 link coil suspension 38.5 SX Swampers

Then it sounds like you are OK. I, however, am in the 1/4 to 3/8 group, and am looking at getting a new thermostat.

_________________
2005 CRD Limited Flame Red w/ Renegade rock rails & light bar, AirLift 1000. 225/75R16 MT/R's on cheap black steel wheels, dual MOPAR subwoofers, Ipod kit & seat covers, Samco hoses - totaled and gone. 2008 WK Laredo 3.0L diesel - AirLift 1000, wife won't let me mess with it much. 2013 JK Sahara on order.

RTStabler51,

I have also experienced a decline in temp reading on my gauge, and that is confirmed because I find I need to turn the temp dial on the cabin heater about 20 to 30 degrees more clockwise than I used to in order to get comparable cabin heat.

The question: can you see in the thermostat the valve mechanism and the parts that move the valve to respond to temp? What I am wondering is there anyway to strategically bend the bimetallic strip and/or spring, to overcome the tendency to open too soon?

One thing i notice in your picture is that the inside looks very clean so it doesn't appear that crud has built up and altered the mechanism.

Mine sits just a smidge higher than that, but no-where near the 176 mark (and it hasn't for some time). Is there an OBD-II reading to pull the actual temp from the coolant temperature guage? I'd be interested to see what the actual numbers say and remove the chance of error from the guess-work on the gauges.

At normal operating temps (not towing or anything), it should be around 200 or so, right (as the t-stat starts opening at 176)?

Dan

_________________

2005 Silver CRD Limited
245/75R16 GoodYear Duratracs
Fumoto drain | ProVent CCV Filter
Stanadyne FM100 filter | Cummins fuel pump
GDE Eco | SEGR | BoulderBars | FrankenLift | Frankenskids

With it installed, there is no way to see any of the parts opening or closing. My coolant and thermostat are both very clean. I think it just plain ol' got wore out. I have about 50k on my coolant, as I had it flushed at approximately 28k due to some gunk build up from the original stuff.

_________________
Ryan
2006 Ford F-250 PSD CC FX4
**GONE**
2005 Jeep Liberty CRD
SAMCO Hoses//GDE Tune//PML Trans Pan//TransGo HD Shift Kit//MBRP Exhaust

1986 2R Mustang SVO

Anybody know if the thermostat has been updated or revised from it's first issue, have the part numbers changed, or is there a TSB on it?

BY the way, Good work RTStabler1

_________________
2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

I am thinking I would not want to mess with it to try to get it to open later as a small adjustment might have you overheating. Also It could be a wax pellet based design similar to my corvettes, but can't find any source to confirm that. On those designs the wax heats and pushes the thermostat open as it expands. Possibly it could be modified in the same way. I don't know.

Here is info on modifying the Corvette wax thermostat:

_________________
Previous-05 CRD KJ;Current-2010 Taurus SHO Twin Turbo (450HP), 2014 Subaru Forester Turbo (stock)

Can one of you guys who has replaced your thermostat check your coolant temperature with a Scangauge or similar? I'd like to know what the engine runs at with a brand new thermostat.

_________________
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,
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.

Thanks for the thermostat man

Got your old thermostat yesterday in the mail.

_________________
Previous-05 CRD KJ;Current-2010 Taurus SHO Twin Turbo (450HP), 2014 Subaru Forester Turbo (stock)