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XJ Ask the Question Thread
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
Posts: 18,251
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12 Posts
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
If your electric fan is coming on a lot more frequently, chances are other parts of the cooling system need refreshing. The coolant, thermostat, and mechanical fan clutch all need replacing on their own intervals.
my car new parts:
75C thermostat, temperature sensor, e-fan, mechanical fan(heavy duty), radiator, radiator pipes, head gasket.
I still suspect e-fan, I think it closes early e-fan. How do I know it is working properly mechanical fan and e-fan ? Thank you.
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
Posts: 21,029
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Cooling question for my YJ, but it's an XJ motor.
Backstory:
The temp has been staying at about 200°F around town, but it jumps up to about 240F (just below redline) on the highway every day to and from work. Turning on the heat doesn't make a difference, but it drops right back down when I get off the highway.
I've been doing a lot of reading, and I ran across something on JF right before I bought a new lower radiator hose. Apparently, the XJ and later YJ temp sending units are physically identical, but the range of resistance is different. I found numerous people who had similar symptoms, and it turned out they had an XJ sender feeding their YJ gauge inaccurate readings.
Question:
I had a spare, so I put in a new YJ sending unit last night. Now instead of 200/240, I'm getting 180/200 when I'm idling or in town vs on the highway. I know it has a 195 stat because I got it from the dealer and installed it myself. The thermostat housing reads 192±3°F at warm idle, but the gauge reads 180. I admit I haven't yet used the IR gun on the sending unit itself.
I seriously doubt there's a 10°F difference between the front and back of the head. Is there something I'm missing here?
Backstory:
The temp has been staying at about 200°F around town, but it jumps up to about 240F (just below redline) on the highway every day to and from work. Turning on the heat doesn't make a difference, but it drops right back down when I get off the highway.
I've been doing a lot of reading, and I ran across something on JF right before I bought a new lower radiator hose. Apparently, the XJ and later YJ temp sending units are physically identical, but the range of resistance is different. I found numerous people who had similar symptoms, and it turned out they had an XJ sender feeding their YJ gauge inaccurate readings.
Question:
I had a spare, so I put in a new YJ sending unit last night. Now instead of 200/240, I'm getting 180/200 when I'm idling or in town vs on the highway. I know it has a 195 stat because I got it from the dealer and installed it myself. The thermostat housing reads 192±3°F at warm idle, but the gauge reads 180. I admit I haven't yet used the IR gun on the sending unit itself.
I seriously doubt there's a 10°F difference between the front and back of the head. Is there something I'm missing here?
This video engine is cold
https://vimeo.com/176863593
This video engine is hot(100C-101C)
https://vimeo.com/176863766
This video runtime(100C-101C)
https://vimeo.com/176863866
Cold-hot same
This photo my clutch(I bought 1 month ago)
Do you think the fan is working properly?
https://vimeo.com/176863593
This video engine is hot(100C-101C)
https://vimeo.com/176863766
This video runtime(100C-101C)
https://vimeo.com/176863866
Cold-hot same
This photo my clutch(I bought 1 month ago)
Do you think the fan is working properly?
Newbie
Join Date: Jul 2016
Location: Earth
Posts: 14
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Year: 1998
Model: Cherokee
Engine: 4.0L
hi, i've been looking for new leaf springs for my XJ. if i were to get YJ rear leaf springs would the fit? or should i get brand new replacements?
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
Posts: 21,029
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3 Posts
Year: 1993 YJ Wrangler
Engine: 4.0 I6
CF Veteran
Join Date: Oct 2013
Location: Greenville, SC
Posts: 5,920
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Received 190 Likes
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165 Posts
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0
Cooling question for my YJ, but it's an XJ motor. Backstory: The temp has been staying at about 200°F around town, but it jumps up to about 240F (just below redline) on the highway every day to and from work. Turning on the heat doesn't make a difference, but it drops right back down when I get off the highway. I've been doing a lot of reading, and I ran across something on JF right before I bought a new lower radiator hose. Apparently, the XJ and later YJ temp sending units are physically identical, but the range of resistance is different. I found numerous people who had similar symptoms, and it turned out they had an XJ sender feeding their YJ gauge inaccurate readings. Question: I had a spare, so I put in a new YJ sending unit last night. Now instead of 200/240, I'm getting 180/200 when I'm idling or in town vs on the highway. I know it has a 195 stat because I got it from the dealer and installed it myself. The thermostat housing reads 192±3°F at warm idle, but the gauge reads 180. I admit I haven't yet used the IR gun on the sending unit itself. I seriously doubt there's a 10°F difference between the front and back of the head. Is there something I'm missing here?
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
Posts: 21,029
Likes: 0
Received 3 Likes
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3 Posts
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Senior Member
Join Date: Nov 2013
Location: Jax, FL
Posts: 503
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Year: 1998
Model: Cherokee
Engine: 4.0L
Hey, guys hopefully someone knows whats up. I got my manifold all put back together and it runs like a champ... when it starts. Right now it happens only when cold starting (sitting for a few hours). I can sometimes get it to start on the first try but it runs terrible for a few seconds and definitely can get it running by the second try. I put a dealer CPS and dealer CPS bolts on while I had easy access to it but I'm not sure I torqued it right. Did I mess up something with the CPS or is my Jeep finally feeling what it's like to run the way it's supposed to.
Fuel at prime: 40psi and didn't leak down beyond 36psi after five minutes. Should I perform a longer leak down?
Thanks for any help
EDIT: Upon doing a little research, it looks like I may have a leaky injector or the fuel is leaking back into the tank (check valve?) I'll start investigating that unless someone has a different idea
Fuel at prime: 40psi and didn't leak down beyond 36psi after five minutes. Should I perform a longer leak down?
Thanks for any help
EDIT: Upon doing a little research, it looks like I may have a leaky injector or the fuel is leaking back into the tank (check valve?) I'll start investigating that unless someone has a different idea
Last edited by NewbJeep; 07-31-2016 at 12:47 AM.
Member
Join Date: Jul 2008
Location: Longview, TX
Posts: 187
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Year: 2001
Model: Cherokee
Engine: 4.0 Litre
What am I forgetting?
Hey guys, I just got home from Afghanistan, so there's no telling how much I have forgotten how to do maintenance-wise. Anyways, I am replacing my front Hub bearings and rotors (they were rusted together) but I can't get the caliper back on. Do I need to bleed my brakes to compress the piston?
Old fart with a wrench
No, just compress the pistons and the fluid will return to the master cylinder. If both are off, support the other one just in case so you don't pop the piston out of it. They are supposedly separate systems, but I wouldn't trust them not to bleed across. If using a c-clamp, don't press on the bottom of the piston, but use an old pad to press on. I had a piston set up one time and pressed too hard on the bottom of the piston and blew it out! Cracked!
Last edited by dave1123; 07-31-2016 at 04:00 PM.
Newbie
Join Date: Jun 2014
Location: Blue Ridge Mountains
Posts: 16
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1 Post
Year: 2001
Model: Cherokee
2001 Jeep Cherokee Sport Tire Size
I have a 2001 Cherokee Sport with stock wheels that needs new tires:
Searching online I find that the stock tire size is 225/75-15, but the tires currently on the above pictured wheels are 235/75-15.
Should I look for the 225/75-15 or the 235/70-15? Should I buy the size suggested or the size that's already on there? Does it matter?
What is the largest tire size I can get on my wheels? There's no lift on the Cherokee.
I want to get winter tires, any suggestions?
Thanks!
Searching online I find that the stock tire size is 225/75-15, but the tires currently on the above pictured wheels are 235/75-15.
Should I look for the 225/75-15 or the 235/70-15? Should I buy the size suggested or the size that's already on there? Does it matter?
What is the largest tire size I can get on my wheels? There's no lift on the Cherokee.
I want to get winter tires, any suggestions?
Thanks!
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
Posts: 21,029
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Received 3 Likes
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3 Posts
Year: 1993 YJ Wrangler
Engine: 4.0 I6