JK CRD Big End Failures
 

Hi All,

We have noticed a reasonable number of JK CRD big end issues showing up on the forum.

If your CRD has experienced a big end failure please list details of it here. If we get enough replies then a trend may appear, helping others to avoid the issue.

To begin with this thread should focus mainly on big end failures so please try and keep things specific.

Details of interest include (but not limited to):

Failure type
Model Year
Kms at time of failure
Gearbox type
Any ECU tune installed
Any EGR removal
Catch can installed
General Service interval
Oil weight and type used
Location
Tyres size and diff ratios
% time spent used under reasonable load, i.e. towing or with significant weight on board

ADDED:
kms on odometer when purchased
Transmission cooler added? (if so, location?)

Cheers

This are Gus's details posted in another thread

Failure type? Big end failure
Year? 2010
Kms? 144000
Gearbox? Auto
Tune? GDE
Catch can? Yes provent
Service interval? 7.5k kms
Oil weight and type used? Penrite 10/40 enviro+[IIRC]
Location? SA - cooper pedy
Tyres and diff ratios? 285/70r17 Stock diffs [rear factory locker]
Distance into trip 900km
Distance since previous oil change 1100km
Speed at failure 110kph [cruise control]
Tell tales prior to failure nil
Codes thrown nil
Load at failure - 2800kg/2900kg
Grill obstruction - Grumper with winch
Trans cooler fitted - yes
Exhaust - factory, muffler delete
Ambient temp at time of failure - 30ish

YouTube: Sidetracked Australia for the failure.

Mark, how many kms were on the Jeep when you bought it?

Gus, I think you bought yours brand new right?

Yup from new

See below for my CRD details.

I bet most of the engine failures will of had the ecu tuned.


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I Purchased mine at 104,000kms.

Can you explain your reasoning behind this?


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No reason really just a feeling.
I just think the engine might be under to much stress with the tune .
That's just my opinion.




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I had two tunes done to my jk diesel the first one was way over fueling.
Too much fuel I have heard is bad for diesels.

Then I got the other tune done from a different guy. He told me the first guy didn't delete the egr like he said and it did run alot better and harder.the second tune.

But even after the second tune it was never as smooth as not having a tune at all .
I don't have a lot of faith in them

So to all the people who think they have the egr delete. Do you really know it has. As I thought it was.


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Let's wait for a few more more details of actual failures before we start hypothesising.

Which is the whole point of the thread, to compare actual information

I think we're going to want 8-10 failures before we can decide something is a trend.

I have also added a request for aftermarket transmission cooler information to the original questions

#3 seems to be the common failure point.

Hey guys, anyone else with failure details to add?

If you know someone who's had a failure, please point them in this direction.

It would be good to get a decent list going.

Thanks

I was really hoping we'd get a lot more replies to this...

It's always touted as a big deal but only a few people have actually populated their details.

Another question I was thinking, "was the Jeep on cruise control when the failure occurred or was it on cruise for any significant duration before the failure".

I've noticed my CRD will hold the gear and 'lug' a lot longer on cruise, which certainly feels like the engine is labouring a lot more

I was driving 110km/h had slightly higher coolant temps. 112C in 30C temps. Then followed by a loud ticking noise.


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Hi guys from Greece. My kk crd (with the same engine as yours) died at 148.000 kms. I dont know why. I was just cruising at 120 and the same ticking started. Dont remember which cylinder failed, I must ask my mechanic but I think is the same problem just like you. I am sure that at least 5 same engines failed. I changed mine and found one with 4.000 kms on the clock. Note: no ecu tune or something else on my engine, just litlle bigger tires.

What have people done for a fix,
Rebuild, 2nd hand, are short blocks available ?

I did a rebuild. Im sticking with the recommended oil. I’m using Penrite enviro+ 5w40. No DPF.


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So mine spit the dummy at 170,000 doing 100km/hr done the motorway.
2008 JK
Manual box
ECU tune = no
EGRremoval = no
Catch can fitted = no but had one in the shed to fit
Service interval 10,000 Km
Oil used = FUCHS 5W-30 Proflex XTL - meets all specs
Tyre size 285-70-R17 (33")
Ratios 4.1
Not under load at time of failure
Has done some towing - maybe 5%
#2 big end went

Consider switching to Penrite HPR-5, It is the same spec as enviro but is full zinc so it has better anti-wear properties. Its a 229.5 where enviro is a 229.51, the 1 indicates its a low ash and low zinc that is suited for DPF's.

I contacted Penrite and they recommended it to me once they knew I didn't have a DPF.

$500 for a new DPF. $10,000 for a new motor.. I think using the oil with extra zinc is worth the trade off.

Engine Oil Viscosity (2.8L Diesel Engines)

For vehicles equipped with a Diesel Particulate Filter (DPF), 5W–30 ESP fully synthetic, low ash oil that meets DaimlerChrysler Material Standard MS-11106 must be used.

For vehicles not equipped with a DPF, 0W-40 ESP fully synthetic oil that meets DaimlerChrysler Material Standard MS-10725 may be used.

I got the above from an online service manual.

For non DPF I can only find Shell Helix Ultra 5W-40 that complies to MS-10725.

Wonder if anyone was using that oil and had a bearing go?



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Was it a sound like a loud tappet gone?



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Really loud tapping noise.


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Are you on the jeep jk wrangler crd owners page on Facebook? I’ve posted a video on there of mine.. we’ve been trying to suss it out. I’d really appreciate any help I can get right now


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Yes I am in the jk CRD fb. Did you check the oil filter for metal


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It’s with my mechanic, I’m going up there tomorrow to have a look.. if you don’t mind, search my name on there and it should come up with a video I posted. Drop me a comment or something


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Just to remind, please fill in these details

Details of interest include (but not limited to):

Failure type (which bearing?)
Model Year
Kms at time of failure
Gearbox type (auto/manual)
Any ECU tune installed (brand?)
Any EGR removal
Catch can installed?
General Service interval
Oil weight and type used
Location
Tyres size and diff ratios
% time spent used under reasonable load, i.e. towing or with significant weight on board
kms on odometer when purchased
Transmission cooler added? (if so, location on vehicle?)

New category:
kms since last service?

Have any others gone bang over summer?

It seems like these issues have become less common after seeming quite regular at one point.

Has anyone else experienced this type of failure over the last few years?
the info below would be useful for the rest of us.

Model Year
Kms at time of failure
kms since last service
kms when purchased
Gearbox (auto/manual?)
Any tune installed (brand?)
Tyres size and diff ratios
Oil weight and brand
Location