4.0L engine rant...

[Heep]

Ok I'll match you lets take em out and see who gets the best
we'll do at 35/55/75/90

i'm up here in the land of the cold... up here in kanada :freak3:

 

[tjkj2002]

my xj thats on 35s get better fuel mileage then a KJ i know of :shrug:

I drove a XJ on 35's for 3 1/2 months,I can tell you for fact it does not get better mpg's then a KJ,even a KJ that weighs 6000lbs on 35's.

 

[Dave]

Looks like this thread will go on forever and ever........haha

Dave

 

[Heep]

I drove a XJ on 35's for 3 1/2 months,I can tell you for fact it does not get better mpg's then a KJ,even a KJ that weighs 6000lbs on 35's.

what year was it? what have you done to the motor :badger_1::badger_1::badger_1::badger_1::badger_1: snake snake snnnnaaaaaakkkkeeeee.......

 

[tjkj2002]

what year was it? what have you done to the motor :badger_1::badger_1::badger_1::badger_1::badger_1: snake snake snnnnaaaaaakkkkeeeee.......

The XJ is a '98,stock engine and stock trans.

 

[Ry' N Jen]

Heep.
Go back to your other forum!
This forums for real Jeeps.

 

[tommudd]

Looks like this thread will go on forever and ever........haha

Dave

I'll just wait and come back next year and catch up :happy175:

 

[Ry' N Jen]

Heep's XJ does get really good mpg!

 

[streetglideok]

Tore a 4.0 down the other day, less then 100k, lots of camshaft wear, and two bad exhaust valves. Even the 4.0 will die if not maintained, as this was getting oil changes 8-10k past due, and it croaked. After repairs, it really didnt feel that snappy either. It was way past its prime, and the Wrangler needed something better, but not a 3.8L lol

 

[Heep]

sounds like u got a lemon 4.0L lol i barely do oil changes and beat the crap out of mine and it still kills mustangs off the line... till i cant get it out of 1st.. stupid jeep tranys

 

[tommudd]

3 XJs in my past ( all bought new by me ) and NONE ever got over 18-19 on a good day and I'm **** on upkeep, tuneups etc
KJ on the highway 21-22 easy at 70 +

 

[jmnetus]

Well to each their own. My old stick shift XJ got between 20-24 on highway, my automatic KJ gets 19-20. I suspect the transmission has as much to do with it as anything - I love stick shift but couldn't find a KJ with it when I was buying.

 

[Heep]

Well to each their own. My old stick shift XJ got between 20-24 on highway, my automatic KJ gets 19-20. I suspect the transmission has as much to do with it as anything - I love stick shift but couldn't find a KJ with it when I was buying.

strongly agree with this guy ^^^^

in about 300k i burned 1/2 a tank and the kj that was following me went through a tank :freak3: love my xj in the long hauls but mine you i got a 103L tank :smokin:

 

[SMETNA]

.As soon as I see a all original 4slow reach over 700,000 miles then I may consider them somewhat good.

http://www.allpar.com/old/high-miles/richey.php

Edit: Oops! Someone already linked this.

 

[Dave]

opcorn:

 

[MSReNeGaDe]

Tore a 4.0 down the other day, less then 100k, lots of camshaft wear, and two bad exhaust valves. Even the 4.0 will die if not maintained, as this was getting oil changes 8-10k past due, and it croaked. After repairs, it really didnt feel that snappy either. It was way past its prime, and the Wrangler needed something better, but not a 3.8L lol

The 3.8 isn't bad and anyone that knows engines knows they can stand some abuse

Sent from my SCH-I405 using Tapatalk 2

 

[Dave]

Tore a 4.0 down the other day, less then 100k, lots of camshaft wear, and two bad exhaust valves. Even the 4.0 will die if not maintained, as this was getting oil changes 8-10k past due, and it croaked. After repairs, it really didnt feel that snappy either. It was way past its prime, and the Wrangler needed something better, but not a 3.8L lol

Any engine will die if not maintained with oil changes done 8-10K past due though. Sounds like the one you are refering to was just abused.

Dave

 

[streetglideok]

Any engine will die if not maintained with oil changes done 8-10K past due though. Sounds like the one you are refering to was just abused.

Dave

Thats exactly my point, there isn't anything mythical about the 4.0. It'll die just like any other engine if abused. Cracked heads and blown headgaskets if overheated, just like anything else.

 

[tjkj2002]

Jan Richey

Edit: Oops! Someone already linked this.

Still not 700,000.

My old mans '01 F250 PS has over 700k on her,original engine and trans,and still pulls 20,000lbs+.Only mod is a 5" straight pipe exhasut from the turbo back,oh and custom Brembo front brakes as he always forgets to hook the trailer brakes up.

 

[k99jk99j]

4.0L must be a good motor if you are comparing it to the 7.3L powerstroke diesel.