How to get the temp up

click23 · **Joined:** Thu May 11, 2006 9:22 am **Posts:** 309

On a trip last week was my first real driving of the jeep in cool weather post GDE tune, my temps got down to one or two ticks past 1/4 on the temp gauge. Wouldn't increasing the engine temp improve fuel mileage? What have you guys done to increase the engine temp, besides the modified thermostat?

LibertyCRD · **Posted:** Mon Oct 18, 2010 11:58 am

Sounds like your t-stat has failed to me. Many of us have had the same issue. Now, I run almost half scale in any weather.

click23 · **Joined:** Thu May 11, 2006 9:22 am **Posts:** 309

Mine seems to be outside temp related.

Do any of you block off the grill?

LibertyCRD · **Posted:** Mon Oct 18, 2010 2:27 pm

Yeah, if it's your t-stat it WILL be outside temperature related. These t-stats commonly fail in the open position. So if it's HOT weather... the Jeep will naturally be able to achieve normal operating temperature and you'll never notice it. But if the weather gets cold...that's when the Jeep will have a hard time getting up to full operating temp.

As soon as I changed my t-stat, my Jeep instantly started running half-scale on the temp. guage....whether it's -10°F outside or 95°F outside.

warp2diesel · **Posted:** Mon Oct 18, 2010 2:34 pm

X2 on changing out the Thermostat.
Radiator blocking is for the very cold winter.

kevinl · **Joined:** Mon Sep 13, 2010 8:25 pm **Posts:** 35

I have the same thing happening since installing the GDE tune.

salden77 · **Joined:** Tue Jun 01, 2010 2:42 pm **Posts:** 271

i have same problem in mine, it usually sits a lil above 1/4 temperature though.

TJ2 · **Posted:** Tue Oct 19, 2010 12:28 am

kevinl wrote:

I have the same thing happening since installing the GDE tune.

You guys! It's too bad the search function is worthless.

Replace the t-stat like everyone has said. I found that my fan clutch was bad also. PO didn't have a clue. FSM says that running the 3.7 gasser cold causes sludge build-up. Probably not much good for a diesel either. . . 'sides the heater won't get hot and you'll freeze

kevinl · **Joined:** Mon Sep 13, 2010 8:25 pm **Posts:** 35

click23 wrote:

On a trip last week was my first real driving of the jeep in cool weather post GDE tune, my temps got down to one or two ticks past 1/4 on the temp gauge. Wouldn't increasing the engine temp improve fuel mileage? What have you guys done to increase the engine temp, besides the modified thermostat?

Click,
Here is what Keith at GDE suggested:

Kevin,

The engine now uses less fuel, so it will tend to run cooler, especially if doing light footed driving. If you want to improve the fuel efficiency even more, block off a few of the grill openings during the winter and you can also remove the accordion snorkel coming out the bottom front of the air box. This will allow warmer engine compartment air to be ingested and tends to help fuel efficiency in cool weather. These together will keep the coolant temps warmer. A 192F thermostat is also very beneficial; a LOST member has designed a serviceable t-stat for the CRD at a very reasonable price considering the work involved.

Thanks,

Keith

Joe Romas · **Posted:** Tue Oct 19, 2010 8:05 am

My CRD recently started running cooler too. The only time it would get to one click below half was was when ambient temperatures were above 90 and I was on an interstate. As soon as I exited the freeway it would drop to two ticks below center that VAG-COM said was 156 degrees on a above 90 degree day :shock:

Of course the GDE tune will aggrevate the problem because the engine is running more effeciently. That means less waste heat being produced.

Two weeks ago I installed a new OEM thermostat and it now runs just a tiny bit below halfway. VAG-COM says 174 degrees and my laser light non contact thermometor shows the same where the coolant exits the head going into the thermostat.

I didn't get the modified thermostat because I have an extended warranty and I didn't want 'non original" parts :ALONE:

OldSkull · **Posted:** Tue Oct 19, 2010 11:02 am

Mine just start acting a bit weirdo! One day he run a bit over 150F and the next day he run in normal condition temp, I never seen a shot Thermostat acting like this, intermittent malfunction??? I ‘m Lucky because Mark (kapalczynski) sold me the OEM Sqeeto got in stock for a fair price. I will send the shot one to Mark ASAP

Because of this all my Flex Fan test are compromise, but in fact I learn a few things in the process ….A 2.25 inch pitch blade produce too much noise and a 1.5 inch pitch performance 6 blades fan can be a good bet.

High RPM is not helping a Diesel to get hot faster in winter, use “great power demand” trick and block a bit the front grill like big truck do in extreme cold condition.

flman · **Posted:** Tue Oct 19, 2010 1:18 pm

If mine acts up I will considering the Kaplizinzki tstat, or order an OEM one if the wait is too long, then send Kap the core for the cause of my fellow CRD brethren

Joe Romas · **Posted:** Tue Oct 19, 2010 3:10 pm

flman wrote:

If mine acts up I will considering the Kaplizinzki tstat, or order an OEM one if the wait is too long, then send Kap the core for the cause of my fellow CRD brethren

Moparpartsamerica has then in stock and unless they type the order number for the zip code like they did on mine you should get it in a week or less.

Mine was running 157f on a 90 plus degree day :shock:

Now it runs halfway between stright up and the first tick to the left :jester:

click23 · **Joined:** Thu May 11, 2006 9:22 am **Posts:** 309

The thermostat was stuck open, with the new one it is back to one tick below the 1/2 mark.

How to get the temp up

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