Serious question...

[USAFXJ]

All jokes aside, what kind of advice can you give someone who is new to the XJ family and very new to have a 4x4. I am always afraid I will f up the transfer case. I have been told that the 4.0 litre is damn near bulletproof if you know what your doing with it, well I want to learn everything about the 4.0 litre 4x4.

[SpartyKrunk]

There is not much to learn about the 4.0 It's very simple construction and simple to fix. They can take a beating, and function.

[USAFXJ]

What about improving MPGs, my daughter lives in GA, and I go visit her minimum twice a year, what can I do to improve the gas mileage?

[SpartyKrunk]

Keep it mantained. Clean plugs,your cat must be functional with the honeycomb unbroken. believe it or not the cat makes a big diff in mpg. exhaust leaks also create a drop in mpg.

[USAFXJ]

what about anything aftermarket for the engine? LIke high mileage oil, a different intake, etc?

[SpartyKrunk]

of course. that should be 2nd nature to everyone. warning, stay away from K&N filters.

[USAFXJ]

Was planning on it, what about AEM?

[SpartyKrunk]

I'd go with AEM. How hard do you wheel? Or how often are you on rural highway? Snorkels are more than just for going under water. They let your intake breathe fresh air from the side of the road than the grime thrown up from the vehicle in front of you.

[USAFXJ]

Well since I have only had the jeep less then a week, not alot. My dad and a large handful of my friends live on rural roads. I have thought about a snorkel because it does tend to flood alot where my dad lives.

[SpartyKrunk]

then a Safari snorkel would not be a bad investment. They are not that expensive and easy to install yourself. http://www.safarisnorkel.com/snorkel/ss1195hf/ss1195hf.htm

[USAFXJ]

Wouldnt I have to cut through the fender though?

[SpartyKrunk]

High capacity intercoolers keep your engine alot cooler equaling out to saving fuel. http://www.safarisnorkel.com/turbo/hdj100/sc1hdfte.htm

[SpartyKrunk]

Wouldnt I have to cut through the fender though?

Drill holes and such, yes. But once you get a snorkel, you will never go back. You get a highly detailed sheet of paper charted with drill locations. You just tape it to your left fender and get going.

[dennis461]

All jokes aside, what kind of advice can you give someone who is new to the XJ family and very new to have a 4x4. I am always afraid I will f up the transfer case. I have been told that the 4.0 litre is damn near bulletproof if you know what your doing with it, well I want to learn everything about the 4.0 litre 4x4.

NEVER use 4-wheel drive on paved roads.
Keep out of deep water unless the XJ has had vent lines moved up higher.

[SpartyKrunk]

yep.

[USAFXJ]

Keep out of deep water unless the XJ has had vent lines moved up higher.


Ok, thats all greek to me:huh:

[USAFXJ]

Drill holes and such, yes. But once you get a snorkel, you will never go back. You get a highly detailed sheet of paper charted with drill locations. You just tape it to your left fender and get going.

I would definitely need some help so I dont f it up

[SpartyKrunk]

it's *uck up proof really. They basically put a picture in the fender of your XJ and tell you where to drill. After that, they're all simple connect A with B pipes. Worst comes to it, i'll go do it for you.

[USAFXJ]

small drill holes, or holes larger then an inch or two?

[SpartyKrunk]

one large hole for the snorkel itself, four small drill holes. lookee here:

http://www.davesport.com/davesport/images/items/ss1100.gif

[SpartyKrunk]

ARB also has snorkel kits btw.

[USAFXJ]

yeah I have noticed, nice price!!

http://www.google.com/products?hl=en&source=hp&q=Safari+Snorkel+-+SS1195HF&um=1&ie=UTF-8&ei=5b-hSsbvDpXTlAej2YT1CA&sa=X&oi=product_result_group&ct=title&resnum=4

[SpartyKrunk]

oh, you're being sarcastic. lol. i think its worth it.

[USAFXJ]

Yeah I am known around this area for having a very sarcastic sense of humor.

[USAFXJ]

Maybe I can get a Buy Me a Snorkel fund established.....

[SpartyKrunk]

Yeah, or you can ask one for Christmas, or make a p.o.s. from Home Depot pcp pipe. (not recommended.)

[USAFXJ]

may just go with AEM for now.

[SpartyKrunk]

well of course, for now. but even with a snorkel, you will still have an AEM filter.

[USAFXJ]

http://www.aemintakes.com/images/m/AEM-21-8315DC.jpg

gonna look into this one

[SpartyKrunk]

most mpg upgrades always outweigh the cost/benefit balance over time.

[USAFXJ]

yeah, i know

[SpartyKrunk]

just getting them the first time is the hard part.

[MischiefMan]

There are alternatives to snorkels that do not require you to cut holes in the fenders. There is an interesting set-up, I think it's on GO JEEP (http://www.go.jeep-xj.info/), that relocates your air intake to the low pressure area at the base of the windshield.

You can add a throttle body spacer too to help with the breathing. Along the same vein, as with most vehicles, less exhaust restriction helps. You do not want to open your exhaust too much though, or you'll lose the back pressure that provides the higher torque from the 4.0. I've read that a 2.5" pipe si the most you'll want to go to, after that it has a negative effect on the torque.

The 4.0 is pretty much bullet-proof, but has known cooling issues.

Do you have a 231 transfer case or a 242 (does it have full-time four wheel drive?)? You can tell from the shift pattern, or you can crawl under and look at the little red tag on the back of the TC. There is also a link in the FAQ to help you determine.

Not knowing what kinda of gas mileage you're getting now, it is hard to say what you can do to improve it, if much of anything. Tire size and gearing will help determine it. I think that Good Burboun told me, once upon a time, that he's getting near 18 mpg on his 31's. My ancient '86, rolling on 33's with 3.73 gears with the 2.8L V6, gets around 12-13 (my max speed is 65 btw....and I do mean MAX!!!...that's downhill, with the wind, in the draft of an 18-wheeler). DG's '91, 4.0HO, 35's, 4.10's, gets around 10 on the highway.

I think that most people around here, who maintain their XJ's as DD's, get between 15-18, and tire size + gearing seems to be the main difference.

At some point, you're going to have to decide what direction you'll want to take your XJ in. They are extremely capable vehicles, in many areas. As with all things, it comes down to what compromises you're willing to make.

[scottmcneal]

of course. that should be 2nd nature to everyone. warning, stay away from K&N filters.


Yea, cause i have over 200 thou on mine..:dunno:.. Sorry but i won't jump on this boat..ALL my 4X4s and trucks have K&N in them.. But i live in the desert in CA, so we don't get dirt i guess...Hell, i have one in my motorhome, but it is a diesel pusher....that filter cost more than my first jeep did..LOL

[MischiefMan]

As with everything, YMMV...but, as sad as I am to say this, I must agree with Sparty...

If you don't maintain the K&N religiously, they are bad for a motor. There has been enough scientific testing (vs. real life experience) to convince me that the negatives outweigh the positives of a K&N.

[xxmidianxx]

I must agree with Sparty....


Well he IS your mini-me.

[MischiefMan]

Yeah....yeah....you're just jealous cuz he likes me better than you.

[xxmidianxx]

I am not here to be liked... I am here to baby sit you guys.

:roflmao:

[SpartyKrunk]

There are alternatives to snorkels that do not require you to cut holes in the fenders. There is an interesting set-up, I think it's on GO JEEP (http://www.go.jeep-xj.info/), that relocates your air intake to the low pressure area at the base of the windshield.

Well, in my opinion, the point of a snorkel is to find a fresher source of clean air instead of breathing in the exhaust of the car in front of you. It also breathes air from the top, generally cleaner since the dirt settles close to ground level.



The 4.0 is pretty much bullet-proof, but has known cooling issues.

Yeah it does. I just didn't wanna mention that to you. lol. But I hinted it, by mentioning the addition of an intercooler. lol

[SpartyKrunk]

As with everything, YMMV...but, as sad as I am to say this, I must agree with Sparty...

If you don't maintain the K&N religiously, they are bad for a motor. There has been enough scientific testing (vs. real life experience) to convince me that the negatives outweigh the positives of a K&N.
:thumbup:

[SpartyKrunk]

Yeah....yeah....you're just jealous cuz he likes me better than you.
Yeah. What he said. lol :D

[SpartyKrunk]

I am not here to be liked... I am here to baby sit you guys.

:roflmao:
:bs:

[NW-ZJ-SCOTT]

hmm interesting opinions in here.

Stay away from K&N? i have one. love it. clean it every oil change and they last for along time.

and how can you tell someone to never use 4wd on pavement without having knowledge as to what TC they have? If you have a 242 with Full-Time then by all means. Use it!

I agree with the exhaust statements, Open it up a bit. 2-2.5" pipe. good cat/good muffler Make sure your Exhaust manifold is solid with no cracks.

If it has OEM original mounts, Replace them.

Flush all your fluids, Check your tire pressure.

good tune-up will go along way.

[MischiefMan]

Stay away from K&N? i have one. love it. clean it every oil change and they last for along time.

The problem isn't with the longevity of the filter itself, it is with the amount of dirt that it lets into to the engine. To achieve better airflow, K&N used bigger pores in the filter. They have used oil to catch the dirt particles that pass through these larger pores. All this is fine and dandy if you keep the filter well oiled. If you fail to clean it or oil it properly you create problems for yourself. On the flip-side, at least per Porsche owners, too much oil has adverse effects on the motor internals also. The intake will suck in the excess oil and the dirt that it is holding.

MANY, not all, but many, people do not pay enough attention to their vehicles to maintain the amount of cleanliness and oil that is required to make use of the benefits of the K&N. Every 3K miles may be all that you require to maintain your filter properly, but for people who live in dusty areas, they have to clean and oil it more often. The same holds true for any environment that will allow the oil to dissipate out faster.

[USAFXJ]

What about AIRAID?

And its not full time AWD, its the Command-Trac