post #1 of Old 12-31-2011, 01:45 PM Thread Starter
Donhrrs123
Registered User
1983 CJ7 
 
Join Date: Jul 2011
Location: Grafton
Posts: 6
Engine Balancing

Hello, My recently purchased 1983 CJ7 has an inline 258 6 cylinder. I am a first time jeep owner and loving it. There is a vibration in the drivetrain somewhere and I suspect it is the motor. I will vibrate when in park or in neutral sitting still. Are these motors externally balanced?

Donhrrs123 is offline  
post #2 of Old 12-31-2011, 01:52 PM
VACJ7
Hockey Rules!
 
VACJ7's Avatar
1984 CJ7 
 
Join Date: Jul 2008
Location: Northern Virginia
Posts: 3,783
The 258 is internally balanced.

'84 CJ-7 | REBUILD IN PROGRESS
VACJ7 is offline  
post #3 of Old 12-31-2011, 01:59 PM
nshefbuch
Registered User
1982 CJ7 
 
Join Date: May 2009
Location: piqua
Posts: 1,928
Check motor mounts and check tranny mounts especially the torque arm support off the tranny. If you have poly bushings instead of rubber it will vibrate more

CJ7/SOA YJ leaf/5.3LS/t18a/d300 clock/37"Pitbull Rockers/H1's/14 bolt/d44 ARB 4.10 High Steer
nshefbuch is offline  
post #4 of Old 12-31-2011, 02:05 PM Thread Starter
Donhrrs123
Registered User
1983 CJ7 
 
Join Date: Jul 2011
Location: Grafton
Posts: 6
What if the previous owner used a flywheel/flexplate from a 304? I has a torqueflight transmission. The previous owner said it was a 727, but I think it is most likely a 999.
Donhrrs123 is offline  
post #5 of Old 12-31-2011, 02:13 PM
VACJ7
Hockey Rules!
 
VACJ7's Avatar
1984 CJ7 
 
Join Date: Jul 2008
Location: Northern Virginia
Posts: 3,783
I believe the AMC v8's are all externally balanced, so if the flexplate is from a 304 it would not be neutral balanced. But I could be wrong. I have a TF999 bolted to my 258. Pan shape will tell you if it is a 727 or 999.

'84 CJ-7 | REBUILD IN PROGRESS
VACJ7 is offline  
post #6 of Old 12-31-2011, 02:23 PM Thread Starter
Donhrrs123
Registered User
1983 CJ7 
 
Join Date: Jul 2011
Location: Grafton
Posts: 6
Will do thanks.
Donhrrs123 is offline  
post #7 of Old 12-31-2011, 04:38 PM Thread Starter
Donhrrs123
Registered User
1983 CJ7 
 
Join Date: Jul 2011
Location: Grafton
Posts: 6
Thanks, I suspected that may be the problem, nice motor on your profile pic!
Donhrrs123 is offline  
Reply

Tags
vibration


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Tire Balancing CJ Chet Jeep CJ Forum 15 01-23-2012 12:12 PM
225 v6 clutch balancing jwinsley Jeep CJ Forum 3 02-11-2011 10:12 AM
balancing tires/BB's wjr Jeep CJ Forum 10 08-30-2007 11:13 PM
Powder Balancing Raiderfanatic Jeep CJ Forum 6 09-18-2005 07:25 PM
AMC 304 balancing ? Cayjay Jeep CJ Forum 1 10-17-2001 05:35 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome