SirSam wrote:
InCommando wrote:
I would have to say that, at least to me, not running a demonstrated & actual serious risk of burning to death because my Italian marvel went up like a roman ( get it?) candle makes the V6 the hands-down, undisputed Champeen of engine choices.
http://www.lostjeeps.com/forum/phpBB3/vie ... hp?t=36028How much of an MPG improvement must one see to pay for the funerals of a family of 4? Or is it cheaper if they are pre-cremated?

I fail see the connection.
That is because he did not make a connection, just uttered a bunch of bluster and emotional B.S with no proof of a causative factor. But I will play devils advocate and make the only connection that can be made between the KJ CRD and the taxi cab fires at this point in time-- and show that is largely irrelevant anyway. One part is shared between these two vehicles that is a likely candidate for the vehicle fires-- and it is not the motor, it is the fuel filter head.
Here is what the taxicab situation does not have in common with the KJ CRD :
First, this reported issue is another vehicle not even remotely like the Jeep. Plenty of things could have gone wrong with it.. Blaming the motor itself is very premature. I will show this in painful detail shortly. If some other problem external to the CRD causes the engine fires in the taxicab and it does not apply to the Jeep, then is the 3.7 a "champeen" (sic) engine still (LOL) ?
Second, if the motor is not to blame, but if there is a common fire causation factor between the two vehicles: what is it? Very few parts outside the engine are shared between the Jeep and the taxi, one in particular is-- the fuel filter head. While this may not be the cause of the taxi fires, it is the only likely cause of the taxi fires that would be common between the Jeep KJ CRD and the taxi.
Lastly, even if it were a problem that applied to the 2.8 KJ, if the problem is easily correctable and fixable why would it influence one's purchase choice? I can think of many reasons to buy and not to buy a CRD, an already fixed issue from the past is not one of the latter.
Now, to show that the motor is not the issue:
The VM motor has been used in different variants in marine, industrial and agricultural usage for over 40 years. It has a very long track record of longevity and reliability. If the engine had a habit of catching fire it would not be one of the most popular inboard marine motors in existence.
If it were the engine's fault-- where exactly would the fire be occurring?
The fuel delivery system would be a likely culprit. The fueling system internal to this engine is not "Roman" or Italian by the way, nor is it specific to the 2.9 VM CRD motor-- it is a BOSCH system used on many engines, such as GM Duramax , Powerstroke, and C ummins. It is an industry standard fuel pump and injection system. You don't see those motors bursting into flames, so the likelyhood of the engine's fuel system starting the fire is very remote.
Then we have the turbo and exhaust. I cannot speak for the taxi's, but the turbo on the Jeep is a Garret turbo that is oil cooled. Garret is also not "Roman". It is an American company. The Garret turbo's are used in many applications and due to the engineering and experience of Garrett-- it is unlikely that they are to blame to for the engine fires in and of themselves. That is, unless another exacerbating factor was introduced (a fuel source next to the turbo or perhaps a massive turbo seal failure). The main fuel source next to the turbo would be the oil supply lines to the turbo. If they broke and dumped oil on a hot turbo, they may cause a fire. Note that the turbo oil lines are not necessarily the same between the two vehicles. For that matter, the turbos may not be the same. If the turbo hose was to blame, it would have had to go out constantly and very abruptly-- if it just leaked you would get a smoking and not a fast vehicle fire. Motor oil does not like to burn unless it is very very hot (especially synthetic). When it does start to burn, it smokes up and smells gawd awful. If this was causing the fires, it would be easy to spot. Another issue is a blown turbo seal creating a runaway through oil blowby leaking oil into the intake-- but then the cause would be known as the engine would over-rev uncontrollably and go boom-- not just start burning. Since these issues are easy to diagnose, it is not likely that they are the issues. The rest of the exhaust systems and their routing are not going to be similar at all. If exhaust routing or other heat build up under the bonnet is to blame for the fires on the taxis-- it once again has nothing to do with the Jeep as the parts are not the same.
The electrical system would also be suspect. Many of the electrical system parts are also made by BOSCH and are standardized (computer and network). These computers and the connectors are not known to cause fire issues and are under wide use. The electrical parts that are not standardized would be stuff like the wiring harness-- which are in no way shape or form shared betwixt the Jeep and an English taxi cab! The packaging of the Jeep and the taxi are entirely different.
Which leaves us with the most likely cause that COULD be shared between these two vehicles:
The most likely culprit of these vehicle fires is the POS plastic fuel filter head external to the motor (which is not a part of the engine, nor was any of it spec'ed or designed by VM). This is a known issue on the CRD and was investigated by the NTSB with no conclusive findings. It appears the fuel head is shared between these two vehicles (a BOSCH part only used very infrequently and in both these applications). It is been known on the CRD forum for a year or so now. It is easily fixable at this point. For starters, you can check your fuel heater switch and make sure it is plugged in tight and is not generating resistance between the two connections (heat). if it is replace the faulty assembly or unplug the fuel heater. Other fuel filter assemblies and heating units are also available. Simply tightening and modifying the connectors as shown in the CRD section works in most instances. Note that this does not prove that the filter is the cause of the taxi fires, but if the cause is shared between the two vehicles-- this is likely the issue and not the engine, which is about the only other shared component. While no one condones this sloppy and potentially deadly workmanship, it is a known issue with a fix, just like the blower motor recall in all KJ's, which also caused fires. To coddle the fan issue and excuse it while giving the seal of death to the CRD is ridiculous.
Conclusion:
The most likely source of the issue is the fuel filter and heater assembly. It is a known issue on the CRD. It may or may not be the issue on the taxi. The motor itself is not likely the issue, it is an extremely remote possibility. To take a an industrial engine block that has been produced for over 40 years, decide off a preliminary report that it is responsible for 15 taxi's burning, and then to extrapolate that and apply it to a largely unrelated vehicle with the same motor (all the while where plenty of other applications of the engine have been in service for 40 years with no issues), and then to tar such vehicles with a brush of death and destruction-- is stupidity.
Lastly, if the fuel manager starting a fire (which has a workaround and a fix) is a good enough reason to avoid a vehicle (and it very well may be), then what about the faulty ac fan causing fires (with a recall and work around as well)? It makes no sense to boycott the CRD KJ and coddle the imperfect fire safety record of the gasser. Both have had potential fire hazard issues, and both issues have fixes. If the fact that one of the fire issues existed in the first place is so troubling that the customer would not want the vehicle known to burn up-- then it is in both instances and the point is moot to begin with.
Besides, I would not want anyone having the fan helping to cremate your precious family just so you could drive a KJ to the mall with the ac on.

Maybe walking everywhere is safer than driving a KJ, of course then you might get hit by a car. Who knows, it might even be a KJ with bad ball joints and on fire and out of control?
By the way, if your gasser engine gets a fuel line leak it is actually more likely to burn up than a diesel. Gas is much more flammable thanks to the evaporative vapors. Diesel does not vaporize the same way. This is one reason jet aircraft are considered much safer than gas powered general aviation aircraft they replaced (jet fuel is essentially kerosene, which is a lightweight oil like diesel and thus does not vaporize like gasoline).