Running cool?

LibertyCRD · **Posted:** Tue May 18, 2010 3:47 pm

This has been beaten to death, I know.

So most warm days the Jeep runs close to the half way mark on the temp. guage.

Today it's in the 50s outside and it's running two ticks below half-way on the guage. Would you consider that normal? It always runs two ticks below that mark when it's cool outside. How about you guys? Am I running cooler than you considering the weather?

BVCRD · **Posted:** Tue May 18, 2010 3:50 pm

Sounds right to me.

dritchie · **Posted:** Tue May 18, 2010 4:14 pm

CATCRD · **Posted:** Tue May 18, 2010 5:09 pm

Sounds off. It should not be two ticks left of center. One at most. I bet your thermostat is opening early and you're running at 150 to 160F. Mine sits 2 ticks left of center and the scangauge says 155.

stoutdog · **Posted:** Tue May 18, 2010 5:29 pm

CATCRD wrote:

Sounds off. It should not be two ticks left of center. One at most. I bet your thermostat is opening early and you're running at 150 to 160F. Mine sits 2 ticks left of center and the scangauge says 155.

x2. It may run above the normal mark, but it should almost never run below it (except when warming up).

My father's CRD has this exact same problem, and his mpg is ~3mpg lower than mine on average... this may explain why you didn't see a gain with the GDE tune.

LibertyCRD · **Posted:** Tue May 18, 2010 7:12 pm

stoutdog wrote:

CATCRD wrote:

Sounds off. It should not be two ticks left of center. One at most. I bet your thermostat is opening early and you're running at 150 to 160F. Mine sits 2 ticks left of center and the scangauge says 155.

x2. It may run above the normal mark, but it should almost never run below it (except when warming up).

My father's CRD has this exact same problem, and his mpg is ~3mpg lower than mine on average... this may explain why you didn't see a gain with the GDE tune.

Interesting...

geordi · **Posted:** Tue May 18, 2010 9:12 pm

Mine too, LibertyCRD. I noticed that today, and this smoking-power-loss problem was WORSE than it has been in a couple weeks. OBVIOUSLY related to a cold engine somehow.

WolverineFW · **Posted:** Tue May 18, 2010 9:58 pm

stoutdog wrote:

CATCRD wrote:

Sounds off. It should not be two ticks left of center. One at most. I bet your thermostat is opening early and you're running at 150 to 160F. Mine sits 2 ticks left of center and the scangauge says 155.

x2. It may run above the normal mark, but it should almost never run below it (except when warming up).

My father's CRD has this exact same problem, and his mpg is ~3mpg lower than mine on average... this may explain why you didn't see a gain with the GDE tune.

x3. Mine is never more than 1 tick left of center once it is warm and driving in cold weather.

dieselsmoke · **Posted:** Tue May 18, 2010 10:27 pm

I cant say much but in the 2 weeks...going on 3 mine runs 1 tic to the left of center. only once it ran just a hair over the middle tic mark...there for i am going to do the FFF mod, yes might loose a little power but i plan on a hot tune and turbo upgrade so im not too worried. just my :2cents:

LibertyCRD · **Posted:** Wed May 19, 2010 11:39 am

Well, I guess I'll add a t-stat to the list when I do the timing belt in the next 12 months.

I'm going to have to drive this Jeep for 20 years to get back all this money I'm spending keeping it going. :dizzy:

BVCRD · **Posted:** Wed May 19, 2010 12:37 pm

Why not check the actual coolant temp before throwing money. Mine has been 1-2 ticks left of center since new. When coasting down a long mountain pass, it even goes lower than that. I get 25 mpg hwy around here, and 27-30 when going back to Missouri on I-70.

stoutdog · **Posted:** Wed May 19, 2010 2:05 pm

LibertyCRD wrote:

Well, I guess I'll add a t-stat to the list when I do the timing belt in the next 12 months.

I'm going to have to drive this Jeep for 20 years to get back all this money I'm spending keeping it going. :dizzy:

When you buy the tstat, consider Mark's machined version. Costs the same, easier to change later.

stoutdog · **Posted:** Wed May 19, 2010 2:07 pm

BVCRD wrote:

Why not check the actual coolant temp before throwing money. Mine has been 1-2 ticks left of center since new. When coasting down a long mountain pass, it even goes lower than that. I get 25 mpg hwy around here, and 27-30 when going back to Missouri on I-70.

Did you have the TSB performed to fix the temp gauge? Some CRD temp gauges were miscalibrated low from the factory, I think...

BVCRD · **Posted:** Wed May 19, 2010 2:45 pm

stoutdog wrote:

BVCRD wrote:

Why not check the actual coolant temp before throwing money. Mine has been 1-2 ticks left of center since new. When coasting down a long mountain pass, it even goes lower than that. I get 25 mpg hwy around here, and 27-30 when going back to Missouri on I-70.

Did you have the TSB performed to fix the temp gauge? Some CRD temp gauges were miscalibrated low from the factory, I think...

Not unles it was somehow lumped in with the F37. Haven't had any work done except the lower ball joints.

stoutdog · **Posted:** Wed May 19, 2010 2:56 pm

BVCRD wrote:

stoutdog wrote:

BVCRD wrote:

Why not check the actual coolant temp before throwing money. Mine has been 1-2 ticks left of center since new. When coasting down a long mountain pass, it even goes lower than that. I get 25 mpg hwy around here, and 27-30 when going back to Missouri on I-70.

Did you have the TSB performed to fix the temp gauge? Some CRD temp gauges were miscalibrated low from the factory, I think...

Not unles it was somehow lumped in with the F37. Haven't had any work done except the lower ball joints.

Check on Jeep.com. There is a potential that your tstat is fine and your gauge is off. If your gauge is calibrated correctly, then I would check your tstat - you might be able to improve even more on your current mpg.

BVCRD · **Posted:** Wed May 19, 2010 3:02 pm

A TSB won't be on Jeep.com would it. Only a recall.

stoutdog · **Posted:** Wed May 19, 2010 3:04 pm

BVCRD wrote:

A TSB won't be on Jeep.com would it. Only a recall.

Honestly, I don't know...

You can check.

Anybody else know how to check for TSBs?

BVCRD · **Posted:** Wed May 19, 2010 3:05 pm

stoutdog wrote:

BVCRD wrote:

A TSB won't be on Jeep.com would it. Only a recall.

Honestly, I don't know...

You can check.

Anybody else know how to check for TSBs?

A tsb is just a note or direction for the service tech that tells him how to fix a certain problem. Just instructions.

stoutdog · **Posted:** Wed May 19, 2010 3:27 pm

BVCRD wrote:

stoutdog wrote:

BVCRD wrote:

A TSB won't be on Jeep.com would it. Only a recall.

Honestly, I don't know...

You can check.

Anybody else know how to check for TSBs?

A tsb is just a note or direction for the service tech that tells him how to fix a certain problem. Just instructions.

Yea, I know that. I'm wondering if you can check to see if the temp gauge TSB has been performed on your CRD. I'm thinking it may be relevant to your Jeep.

LibertyCRD · **Posted:** Wed May 19, 2010 3:48 pm

Yeh i got the TSB number from the GDE forum. So how do I check now?

Running cool?

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