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XJ Ask the Question Thread
CF Veteran
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Year: 2000
Model: Cherokee (XJ)
Hopefully somebody who knows will post. Figure I own a gun and am curious. I run synthetic in my diffs. VV975. Wonder what, if anything, that would do to the temp. Stock covers by the way.
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Herp Derp Jerp
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Herp Derp Jerp
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Opinions please (especially from Cruiser and Salad).
Found lots of coolant in my oil after noticing it was disappearing. Never overheated in the 10k miles and 18 months that Ive owned it, but got up to about 230 degree once in traffic.
Replaced the head gasket and changed the oil 3 times. My oil is still milk and im loosing coolant. I did not have the head checked for warping or cracks because I was quoted $240-400 for a magnaflux depending on needing new guides or more parts for the head during reassembly.
I have the option to swap in a used motor out of a 94 for $350 and my time plus gaskets and what not. Or I can take the head off and see what a shop says about it being warped or cracked.
I dont want to waste money, but I would really like to keep my engine original. It makes no noises, runs perfect, oil pressure is excellent. 1998 4.0 aw4, 202k miles.
Found lots of coolant in my oil after noticing it was disappearing. Never overheated in the 10k miles and 18 months that Ive owned it, but got up to about 230 degree once in traffic.
Replaced the head gasket and changed the oil 3 times. My oil is still milk and im loosing coolant. I did not have the head checked for warping or cracks because I was quoted $240-400 for a magnaflux depending on needing new guides or more parts for the head during reassembly.
I have the option to swap in a used motor out of a 94 for $350 and my time plus gaskets and what not. Or I can take the head off and see what a shop says about it being warped or cracked.
I dont want to waste money, but I would really like to keep my engine original. It makes no noises, runs perfect, oil pressure is excellent. 1998 4.0 aw4, 202k miles.
I hate the idea of downgrading to a '94 block but I'm not sure how to tell which component is busted without getting a machine shop involved.
Something tells me he doesn't have many minutes on his plan lol
Idle issue on 91 Cherokee
Ok folks, here's one. My 1991 Cherokee Limited (4.0L) suddenly in the last few days threatens to stall when stopped at an intersection. Starts up fine, but then while still sitting in park, the motor tries to stall but usually recovers and the RPMs go up and down. Once rolling at speed, engine seems to be running fine. Does not threaten to stall every time while stopped with tranny in drive. I have had to pop it into neutral when stopped (which seems to help keep it from freaking out), then drop it back into drive to continue. Also, I notice the tach sometimes shows a higher rate (2000-2100rpm) at slow speed (25-30mph) then it used to (but not all the time), but the engine is not excessively revving.
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
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Year: 1999
Model: Cherokee(XJ)
Engine: 4.0
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
"To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed". I LET OFF THE GAS, THROW THE LEVER, TAP THE GAS AND LET OFF.
4L position: " To engage, slow the vehicle to 2-3 MPH , shift the transmission to Neutral, then shift the transfer lever to the right and pull firmly rearward to 4L".
TO SHIFT OUT OF 4L, SHIFT THE TRANSMISSION INTO NEUTRAL WITH THE VEHICLE STOPPED, SHIFT THE TRANSFER CASE LEVER TO 2H, THEN THE TRANS TO D IF YOU HAVE AN AUTOMATIC, OR INTO FIRST GEAR WITH A MANUAL, AND CONTINUE ON.
Revised 11/20/2014
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
The reason I asked is that some people claim there exists a unicorn out there, a late-build '99 that has '99 everything but somehow got a 0331 head in place of a 0630. You don't have the coil bosses, right??
Honestly I have no idea if there's anything in the block that would break and create that kind of leak. Any chance of finding another 0630? You can spend cash at the machine shop having the head checked but I think that the likelihood that it can be repaired is pretty low.
What a jerk!
Your 1991 will vary slightly, but start here: https://www.cherokeeforum.com/f51/th...eaning-179079/
I really want to keep it all original and its running perfect, just tons of coolant. I just changed the oil like 15 miles ago with rotella and MMO. Do you recommend just taking it to the machine shop and having them magnaflux and check for warping?
At this point im willing to spend the money on it because I want to keep the head.
At this point im willing to spend the money on it because I want to keep the head.
What a jerk!
Ok folks, here's one. My 1991 Cherokee Limited (4.0L) suddenly in the last few days threatens to stall when stopped at an intersection. Starts up fine, but then while still sitting in park, the motor tries to stall but usually recovers and the RPMs go up and down. Once rolling at speed, engine seems to be running fine. Does not threaten to stall every time while stopped with tranny in drive. I have had to pop it into neutral when stopped (which seems to help keep it from freaking out), then drop it back into drive to continue. Also, I notice the tach sometimes shows a higher rate (2000-2100rpm) at slow speed (25-30mph) then it used to (but not all the time), but the engine is not excessively revving.
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
No, I don't lick fish.
The crank/no-start could be fuel pump or several other things. Verify with a fuel pressure gauge before replacing Fuel Pressure Regulator, fuel pump, or fuel filter.
well it doesnt over heat it just gets too hot for my liking, and because i dont have an actual temp gauge (i just have a light that comes on when it gets hot) im thinking the clutch in the engine fan is shot, its really loose. i can spin it by hand when the motor is off, i dont like the engine fan anyways so i was just going to take it off and replace it with an electric fan.
Ok folks, here's one. My 1991 Cherokee Limited (4.0L) suddenly in the last few days threatens to stall when stopped at an intersection. Starts up fine, but then while still sitting in park, the motor tries to stall but usually recovers and the RPMs go up and down. Once rolling at speed, engine seems to be running fine. Does not threaten to stall every time while stopped with tranny in drive. I have had to pop it into neutral when stopped (which seems to help keep it from freaking out), then drop it back into drive to continue. Also, I notice the tach sometimes shows a higher rate (2000-2100rpm) at slow speed (25-30mph) then it used to (but not all the time), but the engine is not excessively revving.
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
Nothing has changed on the vehicle recently and this just started a few days ago. If it does stall, it starts right back up.
I am starting to suspect it maybe the crack shaft position sensor going bad, but I'm not sure.
Anybody got any ideas????
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1,195 Posts
Year: 2000
Model: Cherokee (XJ)
CF Veteran
Join Date: Oct 2015
Posts: 7,409
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Year: 2000
Model: Cherokee (XJ)
Here's how the factory suggests you shift the transfer case and I've been doing this since these things were new and I worked at the dealership. Quoted from the owner's manual. The suggestions in CAPS are mine.
"To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed". I LET OFF THE GAS, THROW THE LEVER, TAP THE GAS AND LET OFF.
4L position: " To engage, slow the vehicle to 2-3 MPH , shift the transmission to Neutral, then shift the transfer lever to the right and pull firmly rearward to 4L".
TO SHIFT OUT OF 4L, SHIFT THE TRANSMISSION INTO NEUTRAL WITH THE VEHICLE STOPPED, SHIFT THE TRANSFER CASE LEVER TO 2H, THEN THE TRANS TO D IF YOU HAVE AN AUTOMATIC, OR INTO FIRST GEAR WITH A MANUAL, AND CONTINUE ON.
Revised 11/20/2014
"To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed". I LET OFF THE GAS, THROW THE LEVER, TAP THE GAS AND LET OFF.
4L position: " To engage, slow the vehicle to 2-3 MPH , shift the transmission to Neutral, then shift the transfer lever to the right and pull firmly rearward to 4L".
TO SHIFT OUT OF 4L, SHIFT THE TRANSMISSION INTO NEUTRAL WITH THE VEHICLE STOPPED, SHIFT THE TRANSFER CASE LEVER TO 2H, THEN THE TRANS TO D IF YOU HAVE AN AUTOMATIC, OR INTO FIRST GEAR WITH A MANUAL, AND CONTINUE ON.
Revised 11/20/2014
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Year: 1999
Model: Cherokee(XJ)
Engine: 4.0
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Year: My Jeep is a GMC
If the road has been plowed at all there is no need for 4WD, drive for conditions and there is no need for the constant shifting.
Beach Bum
For the front, it can depend on how long the truck has been running (pinion is close to the 450 degree exhaust pipes). And where you take reading from. Pinion area will likely see higher temps than diff cover/fluid.
If you suspect a bad pinon bearing, get a reading from the output shaft, there would likely be a temperature spike.