Need motor help!!!????
#1
Seasoned Member
Thread Starter
Join Date: Apr 2008
Location: Reed City, Michigan
Posts: 496
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1996
Model: Cherokee
Engine: 4.0
Need motor help!!!????
ok my jeep (2001 XJ 4.0) is making a loud **** ticking/clunking noise (sounds like the loudest exhaust leak ever). I took it to a local shop and told them to diagnose it(told them i wanted to keep it cheep), they basically started it and told me from the noise they heard it was a spun main bearing.
I am totally lost, i dont think spun bearing because i lost no oil pressure. I am just looking for some advice before i tear this thing apart, as in things to look for/try.
The heep has 115,*** miles and i just had the motor out 4 months ago to change cam and cam bearings. When i had it out the cylinder walls had no ridge at all and the most clearance i had on a main bearing was .001,
I am totally lost, i dont think spun bearing because i lost no oil pressure. I am just looking for some advice before i tear this thing apart, as in things to look for/try.
The heep has 115,*** miles and i just had the motor out 4 months ago to change cam and cam bearings. When i had it out the cylinder walls had no ridge at all and the most clearance i had on a main bearing was .001,
#3
Seasoned Member
Thread Starter
Join Date: Apr 2008
Location: Reed City, Michigan
Posts: 496
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1996
Model: Cherokee
Engine: 4.0
oh i forgot about the two codes i got at autozone on their scanner a couple days befor, they were very small evap leak and very large evap leak.
#5
Do you hear banjos?
Use a long screwdriver and put the tip on the block near the bearing journals. Hold it with your hand near the top of the handle, and put your ear on your hand. If it is a spun bearing you should be able to isolate it. I know it sounds silly, but it works, you'd be amazed what you can hear in you engine with this method!! HTH!!
#6
Seasoned Member
Thread Starter
Join Date: Apr 2008
Location: Reed City, Michigan
Posts: 496
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1996
Model: Cherokee
Engine: 4.0
no i havent checked the manifold yet that will be one of the first things i do and i will try that COS thanks
#7
Newbie
Join Date: Oct 2008
Location: Shoreline, WA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1997
Model: Cherokee
Engine: 4.0L
I had the same noise on a 97 xj i just bought (has 70k on it).
First if you have a vacuum leak, it can cause you to run lean, causing detonation, which is what happened in mine. The noise was caused by a cracked piston. Does it run on all cylinders?
As far as cheap goes, it took me a couple weekends but i changed the piston, all of the rings and bearings, plus had the head completely gone through for 600 bucks (including gaskets, etc.).
First if you have a vacuum leak, it can cause you to run lean, causing detonation, which is what happened in mine. The noise was caused by a cracked piston. Does it run on all cylinders?
As far as cheap goes, it took me a couple weekends but i changed the piston, all of the rings and bearings, plus had the head completely gone through for 600 bucks (including gaskets, etc.).
Last edited by N8-XJ-97; 11-11-2008 at 05:32 PM.
Thread
Thread Starter
Forum
Replies
Last Post
toasterknight
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
33
05-21-2016 07:03 AM
Josh Meck
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
09-27-2015 03:16 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)