Can anyone point me to a thread or tell me the procedure to disconect the viscous heater. My thermostat isn't working and I fear that the viscous either isn't working or its working all the time and not providing any substance. Anyway, I'd like to disconnect it so It isn't pulling down rpm's or mileage. The thermostat is the next on my list to get fixed, that is if I can find one.
Thanks

I believe there's a relay for that in the fuse box by the battery but I'm not 100%

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

Joe's right, just pull the VH relay from the fuse box and you will pick up at least 2-3 MPG. There is no problem with this and nobody has reported any long-term issues with it. BTW, GDE can reset the shutoff point for the VH. Even with a "failing" thermostat that results in only 160 degree F coolant temp at the moment, our VH shuts off in 5-10 minutes after starting from dead cold.

DOC

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP

I ordered a replacement thermostat from Mopar Parts America - it's not Kap's 190F
but a 170F stock gets better mileage and runs better than a worn 130F thermostat.

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2005 CRD
stuff
Skeptic quod gratis asseritur, gratis negatur

Thanks, I'll pull the relay. I'll replace the thermostat and do the GDE ecotune not necessarily in that order.

I pulled the relay this morning then started the crd. Immediately I noticed a smooth idle that I haven't had before. It used to fluxuate and it had the sounds of an ac unit cutting on and off every few seconds. Thanks guys.

Does the GDE eco tune turn off the viscous heater?

my thermostat begin to fail (it is between 1 or 2 ticks from the middle), and i was wondering if it would be a good idea to pull the relay too, but i already got he eco tune.

Thanks

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Jeep Liberty Limited CRD 2005
GDE Eco
Fumoto drain valve

Not unless you have specifically requested that 'adjustment', the tune may shorten the warm up period, not sure about that. I expect GDE will clarify. But being so far north I would never disable the viscous heater unless you have something like those supplemental propane heaters air cooled cars had.

viewtopic.php?f=5&t=52364&hilit=viscous+heater

Includes comment by GDE to the effect that the viscous heater can be left off without causing any problems.

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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

We do not turn off the VH, just lower the coolant threshold where it will shut off on its own. With a GDE tune the VH shuts off if the coolant is greater than 131 F. A slightly failed open thermostat will have stable coolant temps around 150-170 F, so the VH would still be off with our tunes. Fixing your t-stat will help acheive the most fuel efficiency from the engine.

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Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531

I would be worried about turning it off completely. The colder the engine runs the more wear it see's internally. Mostly Bore wear. Now turning it off early most likely won't hurt anything since once that warm it usually doesn't take long to reach operating temp. however i would be worried about the lower on/off temp in the winter, as i have noticed if i'm running my heater on a higher setting when its cold (15F or less) the Viscous is running all of the time.

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06 crd, straight pipe, EHM,
99 f250 7.3l powerstroke sled puller, All kinds of goodies.
79 2.3 turbo mustang hatch
88 5.0 vert (blown, but soon to be TT stroker)
66 f100 project.
01 cbr 929rr

I don't believe the viscous heater has anything to do with engine wear, or passenger comfort. Someone from outside of the US correct me, but non US CRD's don't have a viscous heater right?
Therefore the only reason the viscous heater probably was installed in the first place is an FMVSS (Federal Motor Vehicle Safety Standard) that requires the vehicle be able to clear a frosted windshield (under certain test conditions). The only way to do that is to have warm coolant, which is all the viscous heater does. It's only a side effect that the cabin heat comes on a little faster.
I disable mine when the temperature is about 10°F or below, just 'cause I like heat faster then. Otherwise, I like better fuel economy.

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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.

just pull the relay like doc stated it is 2-3 mpg increase.

just pull the relay like doc stated it is 2-3 mpg increase.