What is this debris in oil pan?

kmbarreiros

kmbarreiros

TJ Enthusiast
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Joined
Dec 29, 2021
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196
Location
Fairhaven, MA
Hey People.

Was working on the Jeep today replacing the rear main seal and the oil pan gasket.
98 TJ 2.5L 5speed
So I found the following in the bottom of the oil pan:
IMG_20221111_162621216.jpg


IMG_20221111_162643396.jpg

The pieces are plastic not metal.
Any idea what it may be from?
 
kmbarreiros said:
Hey People.

Was working on the Jeep today replacing the rear main seal and the oil pan gasket.
98 TJ 2.5L 5speed
So I found the following in the bottom of the oil pan:
View attachment 376077

View attachment 376078
The pieces are plastic not metal.
Any idea what it may be from?
Click to expand...
Hopefully your aware the RMS on the 2.5 is replaced via flywheel access and not the oil pan.

Is she idling sounding like a diesel engine.
 
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TJ4Jim said:
Hopefully your aware the RMS on the 2.5 is replaced via flywheel access and not the oil pan.

Is she idling sounding like a diesel engine.
Click to expand...

Ohhh yes I am very well aware. It actually came out fairly easy.
IMG_20221111_213825563.jpg


And very yes to the other question. I had read about that and most post said that was normal noise for a high mileage Jeep. Looks like I will be adding another to do to my to do list.
 
kmbarreiros said:
Ohhh yes I am very well aware. It actually came out fairly easy.
View attachment 376157

And very yes to the other question. I had read about that and most post said that was normal noise for a high mileage Jeep. Looks like I will be adding another to do to my to do list.
Click to expand...

Yep, Melling has a complete replacement timing chain kit with everything needed.
 
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At least on the 4.0 you can reach the bottom of the timing chain with the oil pan off and test the deflection.

My 4.0 snubber seemed like hard rubber and not brittle plastic.

-Mac
 
Yeah according to rock auto there is a rubber peice and a plastic piece. TY all for your help. I will be ordering both parts.
 
TJ4Jim said:
You should be replacing everything at this point not just the tensioner as the chain is most likely worn out.
Click to expand...

I understand and I am glad I didn't just order the parts:
IMG_20221114_170524915.jpg


IMG_20221114_170454706.jpg


Got the cover off today to inspect and the tensioner and rubber piece are fully intact.
I suspect the parts were the remnants of the old one and someone replaced them recently.

Ordered a new gasket and seal from the auto parts store will be here tomorrow.
 
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