94XJ blow-by (again, I know)

Apr 24, 2004 4 Replies
A

I have decided I will fix this problem myself, being that I am a college student money is a tight issue right now so I decided I will attempt to repair this myself.



Here is an image of the engine:



94XJ SE 4.0L L-6
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I have several questions, I am in no way all that engine savvy so I will be wrong in some of my wording, and also this is an excuse for me to start learning.


  1. What are the part numbers/names of the circled items (the image link)



  1. How do I remove the grommets?
  2. Any recommended engine oil additives (brands?) to clean the engine? Amount to put in (the additive)?
  3. I use Mobile 1 Synth. should I change the oil to this one with the additive or should I used a different one so I can flush the system at a cheaper rate?
  4. Anything else that I should check for?

Any help would be greatly appreciated.



Adonis


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M

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The front one turns I 'think', same for the rear one. Unlikely the front one is plugged, but possible, if so you have some serious cleaning issues.

Nope. Unless it is badly sludged up?

Why? Is the system badly sludged up?

Mobile is probably the best at cleaning it depending on how long that back CCV grommet has been broken.

If it is in bad shape you will see the sludge pouring out with the oil when changing it. If you look inside the oil filler cap how bad does it look?

If it is in really bad shape you don't want to clean it out too fast, too much junk gets circulated.

How much oil is blowing into the air filter?

I also think I noticed although it's blurry, the main ground strap from the rear of your engine head to the firewall looking all frayed like it was about to fall apart. That is the main body ground and needs to be solid for good or any usually, running. They fail fast if frayed.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's
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A

When I stick my finger in on all sides I pick up decenlty large amount of sludge.

Not a whole bunch, but a fair amount

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M

I think I would just get the CCV fixed to stop the sludge build up and keep an eye on the shape of the oil when changing it on the regular intervals. That Mobile 1 should clean it out pretty good and not too fast and the oil should stop hitting the air filter.

When you pull the CCV grommet, if the valve cover is plugged with sludge back there, then you might want to remove the cover and do a physical clean.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

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