Chirping Noise Coming From 4.0

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Mar 21, 2014 | 08:23 AM

#16

gs69350

Member

Joined: Sep 2011

Posts: 148

Likes: 1

From: Sellersburg IN

Year: 1992 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by scottmphoto

That's what I was thinking, those rockers should be covered in oil. Something is wrong there.

Correct. They should be covered in oil.

The problem is caused by buildup of gunk/sludge/leprechauns inside the lifters preventing the oil from flowing to the pushrod then rockers. The lifters still pump up but the outlet hole to the top is plugged.

Best fix is replace lifters.

I've taken some drastic chemical measures and so far so good, it is getting quieter everyday. I'll be pulling the cover off on Sunday before/during/after an engine flush & oil change. Am hoping to see restored oil flow.

Jan 20, 2022 | 01:44 PM

#17

colomac

Newbie

Joined: Jan 2022

Posts: 1

Likes: 0

Model: Cherokee (XJ)

Quote:

Originally Posted by gs69350

Did the squeak go away? Ihave the same exact two rocker arms that are dry. Would changing the lifters fix this?

Oct 11, 2024 | 12:04 AM

#18

makros

Junior Member

Joined: Dec 2023

Posts: 75

Likes: 15

From: Los Angeles CA

Year: 1990, 1995

Model: Cherokee (XJ)

Engine: 4.0

I have a similar chirping sound. It only happens shortly after engine first starts for the day. I thought it was the belt, but no amount of belt-dressing quieted it.

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