Oil on plug. Chasing codes.

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
I believe it last said bank 2 rich. In that video he says one cause is a stuck lifter from sludge. Do I swap that lifter or a full set?
 

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
That’s finally some good news. Would this cause random codes and rich/lean conditions on other cylinders? It looks like the spring i

Absolutely yes. The missing rocker arm allows one of the valves to stick open permanently, thus zero compression.

Luckily it is a pretty easy fix, cleaning the lash adjuster and reinstalling. It really is good news considering what else could have been wrong. Note, I have not done this to my Jeep, but saw it done by Eric O.

xc_hide_links_from_guests_guests_error_hide_media

xc_hide_links_from_guests_guests_error_hide_media
The missing rocker would keep the valve closed due to the valve spring pushing up on it - but chances are the valve being stuck open is what caused the rocker to fall off in the first place. In your picture the valve spring looks compressed which means it is more than likely bent or the spring is broken - can you compare the spring height to one of the other exhaust valves when it is closed - that will confirm that the valve is stuck open. And yes that will cause the rich code on bank 2 as raw fuel is going right into the exhaust before it can be properly burnt. Interesting that you didn't get any misfire codes for #6.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
I’ll try to measure. Should that lifter compress and spring back? Before I snap the rocker back in I’m thinking I need a lifter. Can it be soaked In sea foam and come to life?
 

Attachments

  • 1E8D8D76-DBF9-4225-A580-18F6FEBEC974.jpeg
    1E8D8D76-DBF9-4225-A580-18F6FEBEC974.jpeg
    229.2 KB · Views: 8

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
Also on the same cylinder I found the injector was missing the plastic around the base. The rubber o ring was intact but missing the hard plastic. I just ordered 6 injectors and one lifter.
 

Attachments

  • F4C55323-012C-4471-A922-B24F8FFDE9B0.jpeg
    F4C55323-012C-4471-A922-B24F8FFDE9B0.jpeg
    474.4 KB · Views: 3

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
Also on the same cylinder I found the injector was missing the plastic around the base. The rubber o ring was intact but missing the hard plastic. I just ordered 6 injectors and one lifter.
You really need to determine why there is no compression on that cylinder before ordering more parts - you have to get to the root cause of the problem - just ordering random parts is not going to solve your problem and cost you more money in the long run. Just some advice from a long time licensed technician.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
Don’t disagree however with this broken injector and a couple others it will need those. Should I pull the valve spring and check the valve isn’t stuck before putting the rocker back in?
 

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
Don’t disagree however with this broken injector and a couple others it will need those. Should I pull the valve spring and check the valve isn’t stuck before putting the rocker back in?
were you able to compare the valve spring heights to confirm if it is stuck open?
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
Best I can measure they are the same. My best option I feel is to install a new lifter, new injector and pop the rocker back on then check compression praying it exists. Even if it’s other issues I can’t pull the head and it was running on 5 cylinders enough for what I plan to do with it getting me to next winter when I could pull heads or swap of for a donor motor.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
With allot of looking it may1/8th lower than the next cylinder both with no cam pressing on the rocker. Could that be carbon build up holding it open? What are my odds a new lifter, injector and snapping the rocker on knocks the carbon off and she runs like a champ?
 

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
With allot of looking it may1/8th lower than the next cylinder both with no cam pressing on the rocker. Could that be carbon build up holding it open? What are my odds a new lifter, injector and snapping the rocker on knocks the carbon off and she runs like a champ?
It might work - you could also try pressing the valve up and down a bunch of times with a small pry bar before putting the rocker back in to see if you can get it to close all the way. Best way to check would be to remove the exhaust manifold and that way you could try and get in and clean the exhaust valve or see if it is bent, but that could be opening up another can of worms with broken exhaust studs etc.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
Feeling it may be or a lot of carbon and week spring. We know tonight I plan to swap the spring, valve seal and lifter while trying to free up the value with some sea foam once the old valve seal is out. fingers crossed
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
No luck, can’t get the valve spring out and now I’m thinking it may have dropped a valve seat that’s wedged holding the valve open. If I have to run it Asis until I get a set of heads is it better to unplug the coil and injector?
 

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
No luck, can’t get the valve spring out and now I’m thinking it may have dropped a valve seat that’s wedged holding the valve open. If I have to run it Asis until I get a set of heads is it better to unplug the coil and injector?
shoot :( dropped valve seat makes sense - probably just unplug both and see how it runs.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
This seams to be the answer. I’m loosing faith anything else could keep the valve open like this. Also it makes sense why if the rocker fell off how it hung open rather than closed. Next question is new/used heads and gaskets or a full motor swap. Do we have any upgrades that swap in Easily?
 

lfhoward

Well-Known Member
KJ Supporting Member
Joined
Dec 9, 2012
Messages
2,242
Reaction score
2,425
Location
Philadelphia, PA
Just a thought, if you are right about it dropping a valve seat, you don’t want to run it with possible metal debris in the cylinder. Scratching the cylinder wall up or punching a hole in the top of the piston would mean a whole new engine rather than just a new head. Can you get a look into the cylinder through the spark plug hole with your borescope to check for a dropped seat?
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
tried a bore scope lastnight but cant get the angle to see trying another one with a mirror tonight. what's a better move to swap heads and gaskets for 300-400 or swap a motor for 600-800? knowing it prob needs a torque converter soon. my goal was to just get it trailable for this year then swap torque converter or ****** and head gaskets next winter. be nice to get some time to watch for a deal and collect enough to redo the motor, trans, transfer then some gears and lockers.
 

derekj

Full Access Member
Joined
Jul 4, 2013
Messages
194
Reaction score
272
Location
Powell River, BC
tried a bore scope lastnight but cant get the angle to see trying another one with a mirror tonight. what's a better move to swap heads and gaskets for 300-400 or swap a motor for 600-800? knowing it prob needs a torque converter soon. my goal was to just get it trailable for this year then swap torque converter or ****** and head gaskets next winter. be nice to get some time to watch for a deal and collect enough to redo the motor, trans, transfer then some gears and lockers.
Only problem with a used motor is you are possibly getting one that could have a potential valve seat issue down the road - I would go with a good set of rebuilt heads.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
True, thoughts on a set of used take off heads they claim are good to go. Found a set for 100$ plus shipping. I knew it needed a head gasket at some point so mine are toast and would need the dropped valve seal fixed the other trued or milled from the head gasket leak. Agree a new/used motor is what I have at some point.
 

Jhkj04

2004 kj
KJ Supporting Member
Joined
Nov 15, 2022
Messages
99
Reaction score
29
Location
kcmo
Ok let’s talk turkey. If I pull the heads and cylinders look good can I bolt on a used set of heads and go? And the set I have was not taken care of properly so the dropped valve seat is on bad oil changes. I feel a reman set is into that used motor price. I found a motor complete for 800 then a wreck with a motor and trans for 1300.
 

Latest posts

Members online

Top