oil not reaching the rocker arms
#1
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
oil not reaching the rocker arms
i have a 88 cherokee that im having some oiling issues with its a 4.0 L my problem is i cannot get oil to the rocker arms im worried its a spun cam bearing .... i took the pan off and hoped id find out the oil pump was bad which wasnt the case i chucked the gear end up in a drill and stuck the screen in some oil well it pumps oil just fine can someone please help weve spent hours on building this rig and it really sucks to hit this big of a bumb in the road this close to compleation anyone know what it could be what to check or something im over looking ???? please and thank you in advance my cell is 618 410 2536 if youd rather text it doesnt matter either way just some help at all would be great
#2
Seasoned Member
Join Date: Jun 2009
Location: newberg
Posts: 327
Likes: 0
Received 1 Like
on
1 Post
Year: 1988
Model: Cherokee
Engine: 4.0L
Is it rattling from the rockers or just flat not getting oil? Mines doin the same thing after a fresh build and 200 miles. I get good oil everywhere but the last 4 pushrods and have a ton of lifter noise. I'm gonna try a high volume pump I guess and ill post the results here for ya.
#4
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
I didnt take the valve cover off but pulled the plug where you fill it with oil and didnt see any oil in there at all. It makes some lifter noise as well. I guess i could try a high volume pump but mine works just fine. Ill also try cleaning the push rod prts. I hope thats it that would be nice and cheap lol. Thanks for the help
#6
As others have said check oil pressure and push rods and oil level also could be your lifters while your in ther check your valve lash almost every lifter noise problem i have worked on has been due to improper tightining of the rocker arms
Trending Topics
#9
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
I believe the lifters have their own pressurized oil gallery, separate from the cam. So unless the lifter gallery, or lifters, or push rods are plugged, oil should be reaching to the valve train. Any spun bearing is not good but a spun cam bearing should not stop oil flow to the lifters if I'm reading the diagram correctly.
#10
Senior Member
Join Date: Jan 2012
Posts: 952
Likes: 0
Received 3 Likes
on
3 Posts
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
I didnt take the valve cover off but pulled the plug where you fill it with oil and didnt see any oil in there at all. It makes some lifter noise as well. I guess i could try a high volume pump but mine works just fine. Ill also try cleaning the push rod prts. I hope thats it that would be nice and cheap lol. Thanks for the help
#11
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
What diagram are you looking at. Id like to look or find one myself. That would be great. I changed the oil filter to a brand new one and started the motor and let it idle. Shut it of and now oil got to the new filter. What does this mean to anyone? ??
#12
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
It was the oil pump. I guess even though i checked it out it wasnt building enough pressure .. high volume oil pump from car guest for 70 bucks and its purrin perfect
Thread
Thread Starter
Forum
Replies
Last Post
John T
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
02-19-2022 11:27 AM
techman38
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
3
09-11-2015 06:43 PM
15XJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
09-10-2015 11:17 PM
JamDeeper
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-08-2015 08:50 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)