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Old 01-01-2020, 04:50 PM
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JL diesel lift kit?

You may have read that Jeep increased shock/spring stiffness by 10% to offset the extra heft of the diesel configuration. Do you think that they'll be enough volume to justify a diesel-specific lift in the marketplace?

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Old 01-02-2020, 07:45 AM   #2
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You may have read that Jeep increased shock/spring stiffness by 10% to offset the extra heft of the diesel configuration. Do you think that they'll be enough volume to justify a diesel-specific lift in the marketplace?
I wonder how the diesel take off springs will work on the 2 door non-diesel JL's (are they even planning a 2dr diesel?)

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Old 01-02-2020, 10:16 AM   #3
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I wonder how the diesel take off springs will work on the 2 door non-diesel JL's (are they even planning a 2dr diesel?)
Diesel is only available on the 4-door
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Old 01-05-2020, 06:48 PM   #4
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Some of the reviews I’ve read from magazines they say the diesel JL Jeep rides very stiff.
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Old 01-05-2020, 07:03 PM   #5
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Some of the reviews Iíve read from magazines they say the diesel JL Jeep rides very stiff.
yup just because it is a heavier rate spring does not mean it will be a good spring to lift a lighter rig with.
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Old 01-06-2020, 08:23 AM   #6
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Jeep liberty folks were putting diesel springs on there gassers.They may have some info on that.
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Old 01-06-2020, 10:15 AM   #7
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The 400 lbs. of extra nose weight from the diesel engine is roughly 10-12% of the total curb weight of a JLU Sport. That may be where the rumors of 10% additional spring rate came from.

In any case, I expect the front end of these EcoDiesel models to be very stiff to handle that nose weight, and it is unlikely that the aftermarket will respond with coil springs that are of better quality than the factory springs, at least not any time soon.

So, if it were I, the best way to go is just use coil spring spacer lifts. We've already seen how capable coil spacer lifts are. Check out some of Lite Brite's early YouTube vids. They conquered some really technical trails with the $169.99 Rough Country spacers.
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Old 01-12-2020, 01:23 PM
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That may be where the rumors of 10% additional spring rate came from.
Just to be clear, I wasn't referring to a rumor. I read this in the latest Car & Driver issue. Theirs is the first instrumented test by a major automotive magazine. I suspect that their source is high up within Jeep.
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Old 01-12-2020, 02:17 PM   #9
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The 400 lbs. of extra nose weight from the diesel engine is roughly 10-12% of the total curb weight of a JLU Sport. That may be where the rumors of 10% additional spring rate came from.

In any case, I expect the front end of these EcoDiesel models to be very stiff to handle that nose weight, and it is unlikely that the aftermarket will respond with coil springs that are of better quality than the factory springs, at least not any time soon.

So, if it were I, the best way to go is just use coil spring spacer lifts. We've already seen how capable coil spacer lifts are. Check out some of Lite Brite's early YouTube vids. They conquered some really technical trails with the $169.99 Rough Country spacers.
Wondering here about the actual weight of the 3.0 and how much of the 400 pounds you stated is on the springs. The engine itself is right around 500 pounds. What is the weight of the 3.6? The two Jeep automatic transmissions weight the same. The front axle is a slight upgrade on non-Rubicon models. I do not see this 400 pound weight increase that has been posted around the web. Maybe the weight of the new powertrain is being over emphasized.
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Old 01-13-2020, 08:38 AM   #10
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TFL (The Fast Lane) on YouTube very frequently interviews Jeep engineers. The engineers said that the EcoDiesel model weighs 450 lbs. more than a 3.6L model.

We then assumed that the DEF tank and fluid was probably 50 lbs. of that, which leaves 400 lbs. to the engine itself.

But then yesterday they actually put a JLUR diesel on the CAT scale and it went 5,080 lbs.(!) so if you compare that to the listed gasoline curb weight of a JLUR which is 4,450 lbs, the actual real world difference is over 600 lbs.

If the diesel models add 600 lbs. of weight, that's very significant and will drastically alter the coil springs for lift kits and it'll also change GVWR, payload, and towing specs.
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Old 01-13-2020, 09:52 PM   #11
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Gasoline = 6 pounds per gallon (ppg) 21.5 x 6 = 129 pounds

DEF = 9 ppg 9 x 5 = 45 pounds
Diesel = 7 ppg 18.3 x 7 = 128 pounds

128 + 45 = 173

173 - 129 = 44

So, plus 44 pounds for loaded fuel containers. The only weight of the turbo diesel I have seen stated is 500 pounds. The weight of the Pentastar (stated by FCA in 2015) 326 pounds.

500 - 326 = 174. (44 + 174) = 218 pounds.
Nowhere near 400 or 600 pounds of additional weight.

The turbo diesel model may very well be an additional 400 pounds, but what contributes to that is so far a mystery.
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Old 01-14-2020, 11:33 AM   #12
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Could be heavier radiator. Maybe other components ie starter and alternator might be heavier. Motor mounts etc.
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Old 01-14-2020, 11:51 AM   #13
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JKS offers HD springs in their kits as an option and you can select front/rear or both changed to the HD spring. Wonder if these would be a good option for the diesel JLs?

From the JKS website:

Anticipating the desires of many in the JL community JKS has developed two versions of their dual rate coil spring, the first being the standard dual rate springs offering smooth, predictable performance as well as new heavy duty (HD) dual rate coil springs specially designed for JLs outfitted with winch bumpers, racks and loaded down with other gear. The HD springs net roughly 1/2” more lift than the standard springs and are designed for extra load capacity.
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Old 01-21-2020, 09:59 AM   #14
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Coilovers. Customize your ride height and spring rates.

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