Just recently started to burn oil. 150k stock. Has been running well but burning like a quart every 100 miles. Checked compression and is all near 140s. No oil in the intake tract. Where is the most likely problem? No codes. Runs fine.
Is it the valve stem seals or the piston oil rings?
How do you check and tell the difference?
Burning Oil
-
jeepxj3
- Movin on up ^
- Posts: 370
- Joined: December 5th, 2013, 1:55 am
- Stroker Displacement: 4.6
- Vehicle Year: 1998
- Vehicle Make: jeep
- Vehicle Model: xj
-
SilverXJ
- Global Moderator
- Posts: 5790
- Joined: February 14th, 2008, 7:14 am
- Stroker Displacement: 4.6L
- Vehicle Year: 2000
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Radford, Va
Re: Burning Oil
Do you see smoke behind you at all? That is quite a bit of oil.
2000 XJ. 4.6L stroker
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
-
jeepxj3
- Movin on up ^
- Posts: 370
- Joined: December 5th, 2013, 1:55 am
- Stroker Displacement: 4.6
- Vehicle Year: 1998
- Vehicle Make: jeep
- Vehicle Model: xj
Re: Burning Oil
Yeah, lots of black smoke on accelerating.
-
SilverXJ
- Global Moderator
- Posts: 5790
- Joined: February 14th, 2008, 7:14 am
- Stroker Displacement: 4.6L
- Vehicle Year: 2000
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Radford, Va
Re: Burning Oil
Grey/blue smoke = oil. Piston rings, valve stem seals or CCV system
Black smoke = too much fuel. Stuck injector, faulty O2, failed FPR.
Black smoke = too much fuel. Stuck injector, faulty O2, failed FPR.
2000 XJ. 4.6L stroker
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
-
jeepxj3
- Movin on up ^
- Posts: 370
- Joined: December 5th, 2013, 1:55 am
- Stroker Displacement: 4.6
- Vehicle Year: 1998
- Vehicle Make: jeep
- Vehicle Model: xj
Re: Burning Oil
Grey/blue vs Black. I will have to watch closer. It's definitely not black like a diesel.
I don't get any engine codes. If it was fuel and rich, I would think that I would get an engine light. My mileage hasn't dropped.
I will look/watch closer and try to see if it is more grey/blue or black.
I guess I could also disconnect or plug the CCV hoses to make sure they aren't the problem but I don't get any oil in the air filter box or in the catch can.
I don't get any engine codes. If it was fuel and rich, I would think that I would get an engine light. My mileage hasn't dropped.
I will look/watch closer and try to see if it is more grey/blue or black.
I guess I could also disconnect or plug the CCV hoses to make sure they aren't the problem but I don't get any oil in the air filter box or in the catch can.
-
jeepxj3
- Movin on up ^
- Posts: 370
- Joined: December 5th, 2013, 1:55 am
- Stroker Displacement: 4.6
- Vehicle Year: 1998
- Vehicle Make: jeep
- Vehicle Model: xj
Re: Burning Oil
Watched today, definitely blue/grey and not black.
-
jeepxj3
- Movin on up ^
- Posts: 370
- Joined: December 5th, 2013, 1:55 am
- Stroker Displacement: 4.6
- Vehicle Year: 1998
- Vehicle Make: jeep
- Vehicle Model: xj
Re: Burning Oil
Ordered some valve stem seals and bought a spring compressor and leak down tester to do the job. Hopefully this will fix the problem.
Who is online
Users browsing this forum: No registered users and 31 guests