Quantcast Camshaft, Timing Cover 258 I6 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles

Go Back JeepForum.com > Models > Jeep CJ Forum > Camshaft, Timing Cover 258 I6

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineGR8TOPS Introduces the Exogate HD Tire Carrier4.25" 97-06 Jeep TJ Wrangler Lift Kit - NO SYE Needed

Reply
Old 03-13-2008, 03:26 PM   #1
EtownCJ5
Registered User
1982 CJ5 
 
Join Date: Feb 2008
Location: Louisiana
Posts: 113
Camshaft, Timing Cover 258 I6

ANyone have any experience with a camshaft moving forward with enough force to crack the timing cover? What could cause this? Is there a spring that belongs between the sprocket and cover? I do not see any on the parts diagrams.

Any help would be appreciated.

EtownCJ5 is offline   Reply With Quote
Old 03-13-2008, 04:18 PM   #2
cscotted
Registered User
1980 CJ7 
 
Join Date: Aug 2007
Location: Raeford, NC
Posts: 131
cam walking out?? loose chain to sprocket tension?? maybe??
cscotted is offline   Reply With Quote
Old 03-13-2008, 05:25 PM   #3
ctm
Registered User
1990 YJ Wrangler 
 
Join Date: May 2007
Location: Boston MA
Posts: 1,385
at some point there was a change to the cam bolt and it got a center hole to hold a little spring and a spring cover to push lightly against the timing cover...my 90 is set up this way

see "camshaft thrust control" on this page

http://www.rebuiltautoengines.com/jeep-articles.html

Camshaft Thrust Control On Chrysler 2.5, 4.0 & 4.2L (Jeep) Engines

AERA membership has reported a mysterious knocking noise on Chrysler 2.5, 4.0 and 4.2L engines used in various Jeep utility vehicles. The noise is loudest at the lower front area of the engine and has, on occasion, been reported in all of the above listed engines. The noise will disappear if the engine is operated at higher than idle speed.

Disassembly of the engine revealed that the camshaft gear was making contact with the timing cover. Recalling the engine's assembly, several machinists remembered encountering a bolt that had an 1/8 hole in it. Most were unsure where to install the bolt.

As of the 1991 production year, Chrysler has updated the engine to a new method of retaining the camshaft in the block. Prior model year engines were equipped with a camshaft thrust plate. This has been superseded by a special bolt, spring, plunger and front cover (see illustration). The plunger assembly maintains constant pressure on the camshaft, preventing it from moving
forward. Camshaft chucking will result if this thrust control assembly is not reinstalled. The pin rests against a small protruding pad in the front cover that is reported to be 1.000 from the gasket mounting surface.

A replacement Pin Package is available from Chrysler under the Part #83502890.
ctm is offline   Reply With Quote
Old 03-14-2008, 07:34 AM   #4
EtownCJ5
Registered User
1982 CJ5 
 
Join Date: Feb 2008
Location: Louisiana
Posts: 113
Thanks guys. Anyone have a picture of this setup or the parts?
EtownCJ5 is offline   Reply With Quote
Old 03-14-2008, 10:03 AM   #5
CJ Chet
Registered User
1986 CJ7 
 
Join Date: Dec 2005
Location: Yorktown, Virginia
Posts: 2,373
Keep in mind that there are also two different timing covers. A thin one and a thicker one. My '86 had a thick one, but the replacement engine I put in ('84 block) has the thin one. Just FYI.
__________________
Beer is the answer - it doesn't matter what the question is!

'86 CJ7, 265 CI, DUI, TF999, Borla, Weber, 4" BDS Lift.
'04 TJ Sahara.
'00 TJ Sahara.
CJ Chet is offline   Reply With Quote
Old 03-15-2008, 07:19 AM   #6
EtownCJ5
Registered User
1982 CJ5 
 
Join Date: Feb 2008
Location: Louisiana
Posts: 113
The cover we put back on was from the old engine and was the thin one. I ordered a replacement through a dealership after noone online seemed to have the part in stock and was 2 weeks out. Dealer quoted 4 days. Search of the local junkyards also truned up nothing.

After talking to the folks at S&S (who I bought the engine from) the camshaft timing set up they sent me required the camshaft thrust spring (not included)
After finding out the parts numbers I found them online:

Thank you for placing an order with moparpartsamerica.com

Items Ordered:
Item: SPRING CAMSHAFT THRU
Price: $1.13
Tax: $0.00
Qty: 1
Total: $1.13

Item: PIN CAMSHAFT BOLT T
Price: $1.38
Tax: $0.00
Qty: 1
Total: $1.38

I didn't order until 5 PM cdt yesterday so no word on whether it comes back out of stock or backordered. Just have to keep my fingers crossed.

Thanks for the help.
EtownCJ5 is offline   Reply With Quote
Old 03-15-2008, 12:34 PM   #7
EtownCJ5
Registered User
1982 CJ5 
 
Join Date: Feb 2008
Location: Louisiana
Posts: 113


The spring is no longer available from Mopar.

Anybody know where to source this?

Thanks.
EtownCJ5 is offline   Reply With Quote
Old 03-15-2008, 04:11 PM   #8
ctm
Registered User
1990 YJ Wrangler 
 
Join Date: May 2007
Location: Boston MA
Posts: 1,385
did you try ordering by the package number in my previous post
"A replacement Pin Package is available from Chrysler under the Part #83502890"

a google search turns up a few sites:

http://www.hesco.us/shop.asp?action=details&inventoryID=45343&catId=


http://www.amxfiles.com/archive/show.cfm?postid=118452&row=2
ctm is offline   Reply With Quote
Old 03-15-2008, 06:11 PM   #9
EtownCJ5
Registered User
1982 CJ5 
 
Join Date: Feb 2008
Location: Louisiana
Posts: 113
Thanks. They updated my order to that same part number. So now I don't know if I'm getting the spring or not.

Edit: I just went ahead and order the part from HESCO for insurance. Thanks a bunch CTM.

Last edited by EtownCJ5; 03-15-2008 at 06:24 PM..
EtownCJ5 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads




Glock Forum



Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.

Copyright © Group Builder, Inc - All Rights Reserved