Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!

Bad lifter! Replace cam?

Thread Tools
 
Search this Thread
 
Old 04-17-2016, 09:54 AM
  #16  
Old fart with a wrench
 
dave1123's Avatar
 
Join Date: Nov 2010
Location: Manlius, east of Syracuse, NY
Posts: 14,398
Received 728 Likes on 632 Posts
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
Default

Unfortunately, I agree with peep. Either fix it and enjoy it or sell it as is, in pieces. Once in a while a soft cam gets thru the inspection process before assembly or a lifter wasn't hardened right. It happens. Don't throw away a good engine by not replacing that cam.
Old 04-17-2016, 03:26 PM
  #17  
CF Veteran
 
97grand4.0's Avatar
 
Join Date: Nov 2015
Location: syracuse ny
Posts: 2,800
Received 179 Likes on 166 Posts
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Default

He had one lifter go south. Everyone knows you can put a new lifter on an old cam. lol. well?
Old 04-18-2016, 02:29 AM
  #18  
Old fart with a wrench
 
dave1123's Avatar
 
Join Date: Nov 2010
Location: Manlius, east of Syracuse, NY
Posts: 14,398
Received 728 Likes on 632 Posts
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
Default

Yeah, you can do anything you want, BUT the new lifters will be trash in short order if the cam lobes aren't flat. Remember the valve spring seat pressure multiplied by the rocker ratio put about 250 lbs of pressure or more on the lifter and more when it opens. That rubbing surface had better be smooth and flat. If the old lifters are dished at all, the cam lobes are starting to round over. That one lifter was so dished it wore a hole in the bottom! The edges are chipped by riding on the base part of the cam. Also remember when the cam lobes wear, you lose lift.

BUT you can do whatever you want when it's yours.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fmishin
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
12
03-12-2016 09:38 PM
joeharris5902
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
03-02-2016 02:17 AM
Braquehunter98
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
02-29-2016 12:44 PM
fmishin
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
0
02-27-2016 08:37 PM
7ate9
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
02-26-2016 04:23 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Bad lifter! Replace cam?



All times are GMT -5. The time now is 06:41 AM.